OLM installer user manual r29.pdf

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OLM Installer version 2.9

User manual

ELCON REG. NO R90895-04, 1998Edition 5, 2005-07-08

Information in this document is subject to change without notice. No part of this documentmay be reproduced or transmitted in any form or by any means, electronic or mechanical, forany purpose, without the express written permission of Elcon International AB.

OLM is a Registered Trademark of Elcon AB Sweden


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Table of contents

Introduction ................................................................................................................................ 3The OLM Installer ................................................................................................................... 4

Program installation and basic usage ................................................................................ 5High voltage circuit breakers ..................................................................................................... 8

OLM switch monitor equipments.......................................................................................... 10Switch monitor equipment installation.............................................................................. 13Diagram window controls ................................................................................................. 28

The OLM-server engine........................................................................................................ 30Install and configure a server engine ............................................................................... 31

OLM2 switch monitor measurements ................................................................................... 36Test and calibrate an OLM2 switch monitor .................................................................. 37

OLM2 switch monitor parameter data................................................................................... 43OLM2 hardware specification summary ............................................................................... 45Declaration of conformity......................................................................................................... 47


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Introduction

The object of this manual is to describe both the fundamentals of an OLM supervisorysoftware adaptation and how to use the OLM Installer program. The disposition however is,in the first hand, directed to be an instruction for use.

For a detailed description of OLM switch monitor equipments and the OLM Explorersoftware refers to the respective user manuals. For detailed description of high voltage circuitbreakers (switches) refers to the manufacturer documentation and general literature on thissubject.

No information how to connect and configure a specific supervisory equipment installation isin this manual. For such information refers to the suppliers documentation.

Version is the number before and revision is the number after the decimal point of theprogram version label.


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The OLM Installer

The OLM Installer is one of the programs, of the licensed software, supplied together withOLM supervision equipments. The program is mainly used as a tool to configure and test

OLM equipment installations. Included are also functions to install and maintain OLMserver engines. The program can additionally be used to do function-tests on, and tocalibrate, separate OLM2 switch monitors.

PC computerThe OLM Installer can be used on most PC computers under Microsoft Windows operatingsystem. Since the Installer program mainly is used at field installations a notebook computercould be practical. On the computer should be at least one free USB or RS232 serial port.

CommunicationOLM switch monitors communicate through a kind of serial interface normally connected to

an OLM-bus. An OLM-bus consists physically of a twisted pair screened copper cable andcan be daisy-chained between one server and up to 31 OLM switch monitor units. Atinstallations however usually the OLM Switch monitors are connected separately.

Supervised objectsThere are several different types and configurations of high voltage circuit breakers in themarket. These breakers, also called switches or just objects in the following documentation,consist of one or more sub-units. Common for an installation usually is one switch monitor persub-unit. The OLM Explorer supervision software can handle up to three such sub-units asa common object. At installations however each, switch monitor provided, unit are handledseparately.

Switch monitoring equipmentAn OLM switch monitor is a sort of data acquisition unit especially designed for switches inhigh voltage environments. External signals as of contacts, power lines, current-shunts andtransformers, travel encoders, gas-density and temperature sensors are connected directly tothis unit. The OLM Installer is used to set the unit conversion factors of these externalsensors as well as some function flags and the internal alarm conditions of the monitor.

ServerThe OLM server engine is a software driver (system service routine) dedicated gathering,buffering and forwarding data of OLM switch monitor acquisitions. This server engine isresident on a computer connected directly or indirectly to one or more OLM-busses and

usually with some sort of Internet connection. The computer, which normally is located in thecontrol room of a substation, is an ordinary PC running a Microsoft Windows operatingsystem. The OLM Installer can be used to both install and maintain such server engines.

CalibrationAll OLM2 switch monitors is tested and calibrated from factory. Under normal circumstancesthen no more calibration is necessary. Test and calibration of switch monitors however can bedone with help of the OLM Installer program.

Gauge unitsGauge units used in this program are limited to SI-standard base and derived units. In the

OLM Explorer, supervision and analysis software, several other common internationalgauge units can alternatively be used.


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Program installation and basic usage

On the OLM system installation CD is documentation and installation files for the OLMExplorer and the OLM Installer programs. There is also the OLM server program, which isincluded in all installations. It can additionally be some supplementary information files there.

Sometimes these installation files are supplied on an equipment suppliers documentation CD.In addition an installation file also can be downloaded directly from the Elcon homepage.

Hardware demandsA conventional PC-computer with a CD-ROM, 100-Mb free hard-disk space and an USB or anRS232 serial communication port is sufficient. 256-Mb or more of internal memory isrecommended.

Software environment demandsMicrosoft Windows operating systems 2000 and XP are supported. No other software, exceptthe OLM Installer itself, is necessary. About the basics of and how to use the operatingsystem its own documentation should be consulted.

Basic functionsThe OLM Installer is used to install, test and calibrate OLM2 switch monitors. It can alsobe used to install and maintain OLM server engines. An installation engineer can be guidedthrough the whole necessary software-adjustment procedure. Additionally all measuringinputs on OLM switch monitors can be calibrated, also with help of a guide.

Installation procedureInsert the OLM system installation CD into the CD-drive of the computer. Usually aninstallation window then appears after a few seconds. If however nothing happens then openthe Run command window under the Start menu and type the letter of the CD-ROM drivefollowed by setup as D:\setup. Then follow instructions, in the OLM software Install ShieldWizard, to complete the installation.

Communication interfaceBefore the start of OLM Installer an OLM switch monitor unit should be connected. Thecommunication between the used computer and the switch monitor is done through astandard RS232/RS485 or USB/RS485 bus converter with automatic direction control.

The converter is then connected, with the supplied cables, to the RS232 or USB serial portson the computer and the OLM-bus terminals to the switch monitor. Also connect power to

the switch monitor and to the converter through its belonging AC-adapter. Communicationcan now be established.

Usually the switch monitor is mounted in a breaker cabinet as a part of OLM supervisionequipment and with an OLM bus already connected. This connection then first has to betemporarily removed.

Unit configuration and related file creation however can be done without a connected OLMswitch monitor as a convenience in preparing installations.

OLM Installer main windowStart the OLM Installer by the OLM Installer icon on the desktop. The OLM Installer main

window is showed. In front of it is also the Connect to OLM switch monitor dialoguewindow showed. Select the number, of the COM-port used, and then click the Connect


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button. If the following try, to connect the switch monitor, is successful the Connect windowdisappears and the communication is established.

If the message Connection failed is showed then something is wrong. First try to connect byselect the respective other communication ports available in this window. If this not helps is itprobably a hardware problem. Check carefully the connections, the cables, the converter and

the AC-adapter. If nothing of this helps consult the supplier of the equipment.

Now most functions, of the OLM Installer, are available.

MenusThere are five categories on the menu bar: File, Installation, Calibration, Server andHelp. Detailed information for use of each function under the Installation, Calibration andServer menus are in its respective section of this manual.


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File menuFunctions under the File menu are the Connect switch monitor dialog and a separateDisconnect switch monitor function.

Clear Alarm is used to clear an alarm state in a switch monitor. Used mainly for testingpurposes. Change password is used to change the password used by an authorized to

calibrate switch monitors. Upload New Program is a command to store new program codein a switch monitor.

Print Calibration is used to print the internal calibration factors for a switch monitor. Quitis used to leave the OLM Installer program.

Help menuUnder the Help menu is the User manual item which opens the on line documentation forthe installer software. There is also the Online Support which, if the computer is connectedto Internet, directly opens the OLM home page with the default Internet browser.

Additionally there is the About OLM Installer item, which opens a window that shows the

version of the program and a button to view the system configuration of the computer used.The About OLM Switch Monitor item is used to shows some common information about aconnected switch monitor.


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High voltage circuit breakersHigh voltage is in this case defined as higher than 35 000 Volt.

Basic object configurationsA circuit breaker installation can consist of one or more breaker units. In configurationsconsisting of more than one unit they usually are of the same type. The most commonconfigurations are one three-pole unit, three one-pole units and three two-pole units.

Each separate unit of an OLM supervised circuit breaker usually is provided with a separateswitch monitor.

Basic construction typesLive-tank circuit breakers are characterized of its contacts high voltage strength. The contactchamber enclosure is isolated from earth and floating. The power lines are connected directlyto contacts on this enclosure. This is the most used type in the world.

Dead-tank circuit breakers are characterized of its compact construction. The contactchamber enclosure is of conductive material and connected to the units frame. The powerlines are connected through bushings from this enclosure. Current transformers, of thisreason, can be integrated directly in the unit. This is the most common type in Northern

America.


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Circuit breakers used in gas isolated switchgear (GIS) environments have a constructionsimilar to dead-tank breakers.

Pole constructionsEach pole of a unit can have one or two internal contacts. The most common isolation, andarc extinguish, medias used are SF6-gas, oil and air. The contact design and size, in

combination with forced- or self- blast techniques, then decides its current and voltagecapacity.

SF6-gas leakage is one of the most common problems in modern breaker constructions.Each separate OLM2 switch monitor can supervise up to three different gas chambers. Theleakage rate and a recommended last date to refill then can be calculated.

Contact degradation or wear can be calculated, from the pole tripping current, if the relation isknown. Different methods can be used in the OLM Explorer to calculate this contact wears.

Operating mechanism typesThe most commonly used technique to mechanically operate a breaker is through a forcedspring. Usually an electrical motor through a gear then charges this spring at each close

operation. Electrically operated clutches, commonly called operation coils, then releaseenough of the spring energy to do the contact movements. This type of operatingmechanisms is very reliable and has no fundamental weak points.

Another way is to use a hydraulic spring accumulator charged by an electrical forcedhydraulic pump. Electrically operated valves then release the necessary energy, troughhydraulic cylinders, to operate the contacts. This type of operating mechanisms can operatevery fast and can store energy enough to perform complex operation series. Disadvantagesare the internal energy loses (oil leakage) that must be compensated by a repetitively use ofthe hydraulic pump.

Other techniques and variations of this both may exists but the basic principal is, with use ofelectrical signals operate a contact, through release appropriate portions of an electrically

charged energy-accumulator.

An OLM2 switch monitor can record operation travel, coil currents, motor current and forhydraulic mechanisms even an energy accumulator travel. The condition of such importantparts as the, operating latches, damping arrangement, motor, spring, operating valves andhydraulic tightening then can be calculated.

Inverted breakersClose is the common system operating state of a circuit breaker. For some applicationshowever the opposite is true. Inverted breaker units can replace common breaker units insuch cases. Poles of these switches also then usually are optimized to connect capacitiveloads.

Synchronized switchesA special variant of three-pole switches has a mechanical contact delay between its poles. Atthree-phase operations then the poles, of these units, are switched at the same or at theclosest opposite phase-angle.

For switches, consisting of one ore more units per phase, instead corresponding electricaldelays between their operating signals are used. With a synchronization device then theoperation phase-angle, of these switches, is optimized for each application.

The most common object of all synchronization methods is to minimize contact wear!

LiteratureMore detailed information about high voltage circuit breakers can be found in common

technical literature on this subject. For details of a specific breaker type consult the breakermanufacturers documentation.


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OLM switch monitor equipments

Depending of the configuration of the switch to monitor, OLM equipments can consist ofdifferent number of switch monitors. Signals to and from a switch as of contacts, power lines,

current shunts and transformers, travel encoders, gas density and temperature sensors andcommunication lines are connected directly to these units. A specially designed field bus, theOLM-bus, then transmits the acquisition data from such installations. On a computer in thecontrol room, this bussed data is gathered and stored. Through network or Internet the datafrom these servers then are transported to the places for OLM Explorer supervision.

OLM2 switch monitorsAn OLM2-switch monitor is a small measure and data acquisition unit designed for use inswitchgear environments. It is adapted to be mounted and connected in the cabinet of thehost object. All communication with the world around is done through an electrical bus.

A switch monitor is continuously waiting for events. Possible events are operations, statusalarms and commands. As soon as an operation occurs is an acquisition and evaluationperformed. The operation record then is saved in memory to be forwarded on command. Astatus alarm record, which occurs at specified conditions, is saved in the same way.Communications are always initiated on command from an external computer. All informationnecessary for external use is fetched in this way. A two level alarm output is also signalingunder specified conditions.

A switch monitor unit can be mounted in the cabinet of the host object without any specialbrackets. It can withstand the intense vibrations that occur for more than 10 000 operations.

Except for the emission and immunity requirements stated for CE-marking an OLM-switchmonitor can manage all those special electrical disturbances that occur in switchgear

environments. Input terminals are also protected for faulty connections possibly done atinstallations.


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The kernel of a switch monitor is built around a signal processor and programmable logic. Theprogram, logic codes and data are stored in a flash memory. Around this kernel is the analogI/O system located. Between the analog interface and the connecting terminals is theprotective logic. This electronic circuit, built on a single PC-board, is then mounted into anEMC shielding aluminum-profile housing.

The internal program and logic-code is downloaded to the switch monitors memory on aspecial command.

Operation monitoringAn operation data acquisition starts with a coil trig signal on at least one coil. If the breaker isin open and both close and some of the trip coils are engaged, at the same time or within aspecified maximum time, then travel data is saved as a close-open operation. In all othercases travel data is saved as separate operations. The last eight operation data records arekept in the switch monitors memory.

A motor operation data acquisition starts and stops with a signal at the spring contact input or

the motor trig input. The last sixteen motor operation data records are kept in the switchmonitors memory.

External interfaceDigital or analog, linear or angle travel transducers can be used. A digital angle or linearencoder usually is used for the mechanical travel. The analog transducer input alternativelycan be used to record spring travels or oil pressure in hydraulic operated breakers.

Conversion functions, of external software, then can convert angular mechanical travels totheir corresponding linear contact travels. The conversion function depends of the place, ofthe mechanism, where these transducers are mounted. The equipment suppliers usually holdboth the conversion data and travel transducers complete with its mounting arrangements.

Each of the coil trig channels, close, trip1, and trip2 has two basic functions. Indicate coiloperation impulses and do acquisition of coil currents. If the operation coils are provided witha resistor to the supply then this coil also can be supervised. Coil currents are preferablymeasured with shunts or Hall element devices but current transformers can be used howeverwith some signal distortion.

Time of the spring contact low impulse is always measured. If some coil supervision channelis used for motor supervision the motor current also is sampled. Motor current usually ismeasured with a shunt but for AC motors even current transformers can be used.

The voltage for up to three power lines can be monitored on each OLM provided sub object.One of this also is the power to the switch monitor itself.

A switch monitor has three inputs for measuring of the main line currents. These currentsusually are measured with current transformers on the secondary of the main currenttransformers. For single-phase units two of these inputs are free and can be used for heatercurrent supervision. The current for up to two heaters then can be monitored, provided thecurrent type is AC.

For measuring of the ambient and the cabinet temperatures are PT100 sensors used. Twopoints measuring method is used, as their connecting cables are intended to be short.

For measuring of SF6 gas density is a special sensor used. This sensor can also measure thetemperature of the gas. The temperature-normalized and the real pressure then can becalculated from this density. Up to three such sensors can be used on each sub-unit.


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OptionsAt measuring on electrical synchronized switches an extra time measuring function is used.Status inputs then are used on the switch monitor mounted on the earliest phase (master).These inputs then are connected to the coil trig signals for the respective following phases.For synchronized close the close coils and for synchronized open the trip coils.

Internal alarmsThere are two identical groups of alarm conditions in a switch monitor. Each group has theirown alarm contact output. For each alarm event an alarm record also is saved in the switchmonitor memory. The last thirty-two alarm records are kept.

MeasuringAll internal measuring data is calibrated to and saved as SI standard units. Both the mantissaand the exponent of the value are saved as signed 16-bit integer values. The exponent is afixed value for each separate measuring parameter.

All internal measuring parameters are calibrated from factory. Under normal circumstances is

no more calibration necessary.

Unit conversion factors for external sensors are specified at installation. Temperature anddensity sensors however need no conversion factors and are connected directly.

CommunicationCommunication to and from switch monitors is by a modified RS485 port. To communicatewith a computer directly an OLM-bus converter must be used in between. In fixedinstallations an OLM-bus is used.

Exception faults

The supervision of internal hardware and externally connected sensors are done with logicallimits.

A watchdog timer handles software malfunctions in OLM switch monitors. If of somereasons the program crashes it is picked up by an exception handler. After that it retries tostart a limited number of times. Retries and internal errors are logged and saved. After a nonrecoverable error process the program goes to a special loop. Any try to communicate withthe switch monitor after that indicates a fault status. A program download is after that the onlycommand recognized by the switch monitor. Alarm contacts also can be programmed tosignal for such faults.


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Switch monitor equipment installation

The following installation instruction is general and includes all the possibilities available tomonitor different parameters of a circuit breaker. There is no hardware installation instructionprovided except, as suggestions, when they are close to the related software adjustmentprocedure. For a specific installation however information about the included possibilities for itis necessary. The equipment supplier provides the necessary information for this.

Supplier installation informationTogether with a certified type-data file is information describing how to connect and install theOLM supervisory equipment. This information is necessary since the configuration datausually only is valid for a specific application. Common files that always should be includedare:

A certified OLM Explorer type-data file

Configuration files, or instructions, for the OLM switch monitor

Mounting and connection drawings with part-lists for the OLM equipment

Physically install a switch monitorFollow instructions, from the supplier, how to physically mount and connect the switchmonitoring equipment on the switch units. First after that this work is finished is time toconfigure the switch monitor software.

CommunicationRemove temporarily the OLM-bus from the switch monitor and then connect the usedcomputer through the RS485 bus converter.

Start the OLM Installer and connect to the switch monitor. From the OLM Installer, always

use the OLM-bus address 0 and the baud rate 115 200 bd. Also see chapter Programinstallation and basic usage.

Switch unit supervision equipment software configurationStart the Configuration Guide under the Installation menu.


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Clear switch monitor dataIt is recommended to always clear the switch monitor memory for old data before starting theconfiguration of new equipment. However do not clear data for already configured and testedinstallations. Use the Clear All Data button.

Restore factory settings

If it should be necessary, the factory settings can be restored. If used, all configurationsettings and calibration values will be restored as they where when the monitor vas deliveredfrom factory. Use the Restore Factory Settings button.

Step to the Next window

Switch monitor power inputThe next window showed is used to configure the Switch monitor power input measurementsand label. On the switch monitor figure at the OLM Installer main window these inputterminals also are marked. Select the type of the power current and if necessary change thesignal name. Step to the Next window.


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Status signal inputsThis window is used to configure the status signal inputs. Most of these signal inputs arededicated standard status contacts in circuit breakers. The a and b status contacts arerespective the closed and the open position indications. The spring status contact is the

spring charged indication. The press status contact is for extra pressure supervision. Thealarm and block contacts are the internal supervisory signals for SF6 gas fill pressure. Theres1 and res2 inputs are for optional use. These inputs are used in electricallysynchronized breaker installations and can in other installations for example be used to checkextra contacts or just a voltage existence at a DC power line. Mark enable, for all used inputs,and if necessary change their names. Step to the Next window.

SF6 gas density and temperature transducer inputsThese inputs are only for Trafag 8774 density sensors. This sensor returns, on its power line,a current pulse train timed as a function of the gas density and the temperature. Enabledesired functions of the used transducers. Step to the Next window.


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Temperature measuring inputsThese inputs are for standard PT100 temperature sensors. Enable used temperature inputsand, if necessary, change their names. Step to the Next window.

Line current monitoring inputsThese inputs (ct1, ct2, and ct3) are intended for line current monitoring with a currenttransformer (ct) usually on the secondary line of the main ct. Only one of these inputs is usedin single-phase switch units so then ct2 and ct3 are free and can be used to for example

heater current monitoring.

Choose the desired function of these inputs. Specify their conversion constants in theChange conversion constants dialogue window opened by a click in the Conversionconstant field.


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The constants for used cts are usually provided by the monitoring equipment supplier.Optimal conversion ratio however is 100 mV out for the full-scale current input. Optimalconstruction is a separated current transformer, connected with a twisted pair cable and theburden resistor close to the switch monitor terminals. This arrangement then prevents fromprevailing electrical disturbances.

Type the new constants and Apply then leave this window with OK button.

Step to the Next window.

Travel transducer inputsThere are two different types of travel transducers that can be used: digital position encodersand analogue position transducers.

Digital position encodersThis type of transducers is incremental but uses a two-phase signal combination that makes itpossible to detect the direction of a move. A counter in the switch monitor then keeps order ofthe physical position of the encoder shaft.

Analog posit ion t ransducersThese types of transducers are of absolute type. The output is a voltage divider with a ratioproportional to the transducer position. Because an analog transducer is not so reliable andaccurate as a digital encoder it shall be used, for mechanical travel recording, only ifabsolutely necessary.

Optionally this analogue input can be used for a pressure transducer if checked (0 40 MPafor 4 20 mA out with use of a 250 ohm shunt resistor).


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Mechanical travelChoose the type of transducer used for the mechanical travel and click the conversionconstant box for the type.

For angle encoders specify the conversion constant directly or use the internal phases per

revolution (PPR) to count per Radian calculation tool for it. For linear digital encoders thepulses per Meter is specified directly.

For analogue transducers first set the switch in open position. Then specify the travel strokein Meter or Radians and click the Calculate button. Operate the breaker to the close positionand click OK. The conversion constant then is calculated and saved.

Spring travelSpring travel recording usually is used only for hydraulic operated switches. For the springtravel an analogue transducer always is used. It means that, when used, the mechanicaltravel has to make use of a digital encoder.

Operate the spring accumulator to its most loaded position. Specify the stroke of the travel, in

Meter or Radians. Operate the spring accumulator to its most unloaded position and clickOK. The conversion constant then is calculated and saved.

Step to the Next window.

Communication portIn installations, this port is connected to the OLM-bus. This bus can have up to 32 unitsconnected including the bus converter of the server. Set a unique address and select thebaud rate for the used OLM-bus, usually 115 200 baud. For switches, which consist of morethen one unit, always use following addresses i.e. L1, L2 and L3. Do not use address 63,which is reserved for the server or 0, which is the broadcast address. Step to the next

window.

Internal alarms

In the standard version of OLM2 switch monitors the internal functions for alarms are limitedto static parameter supervision except for the operation and motor operation times. This is


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because the OLM2 shall be able to fit all type of circuit breakers from any manufacturer. Allother supervision is done externally with the OLM Explorer. An externally calculated alarmstatus however can be transferred back for a switch monitor alarm. See also the OLMExplorer user manual.

Switch monitor alarm conditionsThere are two identical groups of alarm conditions in a switch monitor. Each group has theirown alarm contact output. The only difference between the groups is the alarm signal contact.For alarm group 1 is the alarm contact normally open (no) and for group 2 it is normallyclosed (nc). Select the low and high priority alarm group with regard to power loose indication.

Use the Alarm priority high checkbox, in each group, to select this. For each alarm groupthen the following can be set.

Alarm out function is the contact action performed at alarm. One of the followingalternatives can be used, Disabled, Closing or Opening.

The operation coils can be supervised if a bleeding resistor is connected across itsoperation contacts. Enable the Coil supervision checkbox if an alarm, for suchmalfunctions, is desired.

The motor circuit can be supervised if a bleeding resistor is connected across itsoperation contacts. Enable the Motor circuit supervision checkbox if an alarm, for such

malfunctions, is desired.

If an alarm is desired for internal malfunctions, of the switch monitor itself and itsconnected sensors, then enable the Sensor fault checkbox.

If a command, based on externally calculated alarm conditions, shall be permitted to setalarm of this group then enable the Remote alarm checkbox.

If an action, from some of the status inputs a, b, spring, press, alarm, block, res1 andres2, shall be used to set alarm, it is set here. For each of those signals one of thefollowing alternatives can be used, Disabled, Low -> high, High -> low and both flanks.


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Level supervisionThe values of the following measuring parameters can be supervised with a low limit, a highlimit or in some cases the both. A limit value left blank means not used. For all values SI-standard base units are used.

If heater current monitoring is used then the high and low supervisory limits of Ih1 and Ih2

are specified here.

If the cabinet temperature (Tint) is used then the high and low supervisory limits arespecified here.

The operation time supervisions, for the close, open and close-open operations; high andlow limits are specified here. This function however can only be used if the contactpositions are specified as, in its window, below.

The spring tension time (tm) high limit is specified here

Time between two following motor operations, done without a preceding operation, lowlimit is specified here. Used only for hydraulic operated switches.

The low limits for the power voltage inputs pow, u1 and u2 is specified here.

The travel stroke low limit is specified here. A deviation, of the stroke, can be anindication of a mechanism, a bracket or a transducers malfunction.

When all desired settings, for both alarm groups, is done proceed to the Next window.

Voltage monitoring inputs u1 and u2These inputs can be used to monitor two optionally power voltages. They are differential andcan be connected directly. These voltage inputs also are sampled under operations. Enableinputs to use with its checkbox select current type and if necessary change their names.

In some cases it is necessary to measure voltages higher than the range of monitor inputs(FS). An external resistor is then used in serial with the input. A rough estimation of the

resistor value is (Ufs 280) /273E-6 (ohm) where Ufs is the new Full Scale AC voltage of theinput. For DC voltage exchange Ufs to Ufs/2 in the above formula. Supply the value in the


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External resistor field, with at least 0.1 % precision, and type the Calc button. TheConversion constants (V/V) for the inputs then is calculated and showed. Also be sure that aused serial resistor is fully isolated and rated for the used voltage. Step to the Next window.

Operation coil supervisory inputsThese three input groups, close, trip1 and trip2 are intended for coil trip/current supervisionbut one of them can optionally be used for motor time/current monitoring as below.

Coil Configurations

Inputs Coil config 1 Coil config 2 Coil config 3 Coil config 4

Close Close1 Close1 Close1 Close1

Trip1 Trip1 Trip1 Trip1 Trip1

Trip2 Not used Trip2 Motor Close2

Res1/Res2 Not used Not used Not used Not used


Close Motor Motor Close1 Close1

Trip1 Trip1 Trip1 Motor Motor

Trip2 Trip2 Trip2 Close2 Close2

Res1/Res2 Close1 Res1 Close1 Res2 Trip1 Res1 Trip1 Res2


Close Close1 Close1 Close1 Close1

Trip1 Trip1 Trip1 Trip1 Trip1

Trip2 Motor Motor Motor Motor

Res1/Res2 Trip2 Res1 Trip2 Res2 Close2 Res1 Close2 Res2

The trg signal inputs on each group is for the operating coil impulse and the cur is for the

coil current. The ref input is the common for these two signals. A current measuring shunt orHall sensor device is connected between the cur and ref inputs. A current transformer (ct)


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optionally can be used instead but because this signal is a relatively long DC pulse somesignal distortion then occurs. These current inputs are also sampled under operations.

For motor monitoring are there four different time ranges, 20, 40, 80 and 160 seconds.

Note!Motor sampling is always 200 points and setting the sample time to long just results in

poor resolution. Example 20 sec sample time equals one sample every 0.1 sec and for 40 sec0.2 sec etc.

If Use spring for motor trig is checked the motor sampling starts when the St1 Spring inputsignal changes state from high to low.

Choose the desired function for the inputs and specify the conversion constants. For shuntsspecify just the resistance in ohm and for cts and Hall sensor devices the ratio in V/A. Themonitoring equipment supplier usually provides the constants for the used devices. Optimalconversion ratio however is 100 mV out for the full-scale DC pulse input. For AC motormonitoring 70 mV out is used for the full-scale RMS current input.

Optimal construction, with use of shunts, is the shunt as close to the switch monitor terminals

as possible and connected with a twisted pair cable. Optimal construction, with use of cts, isa separated ct connected with a twisted pair cable and the burden resistor close to the switchmonitor terminals. These arrangements then prevents from prevailing electrical disturbances.

Type the new constants and Apply then leave this window with OK. Step to the Nextwindow.

System configurationSome system properties are necessary to know, for both the switch monitor and the OLMExplorer software, to treat the monitoring data correctly. In this window most settings for thatare collected.


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Unit configuration is the usage, of the monitored sub-unit, in a breaker configuration.Select the use of the unit as, Triple, L1, L2 or L3.

Sync is for monitoring of electrically synchronized breakers. The purpose of this functionis to view the operation parameters in a time relative perspective and not to supervise a

used synchronization device. Choose between the following alternatives, Disabled,Master close-sync and Master open-sync.

AC voltage is the alternate current frequency of the electrical system. Choose between50 or 60 cycles per second.

Max time to open for close-open is the maximal delay time allowed, between the closeand the open signals, for the operation shall be treated as a close-open operation.

Disable close-open operations is done by mark this checkbox. If this function is used allclose-open operations are separated to and saved as close and open operations.

Inverted breaker a check here tells the system that the breaker shall be treated as an

inverted breaker.

Thats all, step to the next window.

Contact positionsMain contact positions, for the monitored breaker type, usually are supplied together with theinstallation instructions from the supplier. If the breaker is checked as a triple unit, as in aprevious window, there are three groups. For single-phase units (L1, L2 and L3) there is onlyone group. The supplier of the equipment usually holds this data.

Optionally this values can be calculated from data measured with a temporarily use of theres2 input on the switch monitor. Use for example a 1 500 ohm 10 W resistor from a 110 VDCvoltage supply (+) to the non-grounded main contact connection of the breaker. Then alsoconnect the st2 res2 (32) input on the switch monitor to this point. Connect then the st2 ref(31) to ground. The return of the power supply (-) shall also be grounded. Operate the breakera few times. The contact positions then can be calculated and stored with the Calculatebutton. For triple units repeat this procedure for the other two poles. Step to the next window.


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System informationAll information necessary to identify an OLM supervised object and the specific unit or sub-unit, which is host of this switch monitor, is here. Most, of the following, information texts canbe up to 32 characters.

Note! If there is more than one OLM monitor for an object preferably use the L1 assigned

monitor for Notes and eventually the Unit serial for all sub units. This is because the OLMexplorer software only shows System Information for the L1 unit.

Object mark is the designation label of the switch.

Manufacturer is the manufacturer of the switch.

Object type is the type of switch used.

Unit serial is the serial number of the sub-unit.

Install date is the switch monitor installation date.

Owner is the owner of the substation.

System function is a short description of the function for the switch in this substation.

Station is the name of the substation.

Region is the name of the region or community where the substation is situated.

Country is the country, state or province of the region.

Time zone is the time zone of the substation.

Longitude and Latitude are the geographical position of the substation.

Notes is a field for free notes. This field can hold up to 254 characters.

Most of this information is used to identify the object for a future supervision with externalsoftware. Longitude and latitude are used to geographically locate a substation and the timezone is used to calculate the local time.


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Finish the guide.Click the Save button and the configuration is finished. If necessary repeat this guide or usethe Configuration.. function, under the Installation menu directly, to complete or change aconfiguration.

ConfigurationIn this window are all the views of the installation guide collected as folders. Click the tab forthe desired function to configure. It is, from this window also, possible to load and saveconfiguration data as files. This function can be useful at switch installations consisting ofmore than one switch monitor provided unit. It can also be a good practice to always saveconfiguration data.

Multiple unit switchesAt installations with more than one switch-monitor it can be practical to save the configurationfor the first unit. This configuration then can be used for the following units, as they arebasically using the same data. Settings, which are different as the unit function, bus addressand serial no, for example then, are adjusted accordingly.

Set timeNow it is time to, check and if necessary, adjust the calendar clock time. Use the Set timefunction in the Measurements.. window under the Installation menu.


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Operation testsWhen the software configurations are finished then it is time to do some operation tests.Operate the switch a number of times to acquire some operation data.

Switch monitor data

A switch monitor keeps data internally for a number of the latest events. These records areorganized in three categories as, Alarms, Operations and Motor operations. Each time data isfetched from a switch monitor also a record of the momentarily input Status data is included.

Open the Monitor data window under the Installation menu. The Switch monitors internally

saved data then are transferred to the computer memory. Included is also a Status datarecord of the command moment. In the four folders, of this window, are the most recent of theswitch monitors data acquisitions available.

Status dataEach time a read data command is sent to a switch monitor, is a status input data imagereturned. At opening, the Switch monitor data window, the status data folder is showed. Allavailable parameters are showed either with its values, or if unused marked Disabled.Values of the status parameters are updated each time the Refresh button is clicked.

The other data folders are reached through their respective tabs. Click the Alarm data tab.

Alarm dataAn alarm data record consists of a status data image, of the alarm moment, with the status

code indicating the alarm cause. A switch monitor keeps the latest 32 alarm records in itsmemory. Use the Refresh button to fetch eventually new alarm data records. Use the down


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arrow on the Show box to select between different alarm records. See the OLM2 switchmonitor parameter data section, of this manual, for more details about parameter records.

Click the Operation data tab.

Operation data

Each time a switch operation is performed, is a record of its data created and saved. A switchmonitor keeps the last eight operation records in its memory. Use the Refresh button tofetch eventually new data records. Use the down arrow on the Show box to select betweendifferent operation records.

A vector parameter cannot be showed as a single value. With the Show graph button in thisview all Enabled vector parameters are showed graphically. See chapter Diagram windowcontrols below, for available diagram settings. Also see the OLM2 switch monitorparameter data section for more details about recorded parameters.

Click the Motor operation data tab.

Motor operation dataEach time a motor operation is performed is a record of its data created and saved. A switchmonitor keeps the last sixteen motor operation records in its memory. The functions of thisview are the same as for Operation data above.

MeasurementsThe Measurement function under the Installation menu can be used to test and verify thefunction of the Switch monitors measuring inputs. See chapter Test and calibrate an OLM2switch monitor.


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Diagram window controls

Following are some controls and settings, for the graphical window, that can be done with useof the Mouse and Keyboard.

The mouse can be used as follows.

Single-Clicking the mouse over windows will give that window the input focus.

Controlling window scrollbars, selecting Hot Spots, and moving the Data-Cursor.

Right-Button Single-Clicking invokes a popup menu.

Double-Clicking a data point shows the value of the data point.

Double-Clicking inside a graphs grid shows the coordinates clicked.

Double-Clicking desk portion of window invokes the customization dialog.

The windows can also receive the following keyboard commands.

Q Shows a popup menu.S Switches between monochrome and color styles.

T Toggles between custom and original parameters.X Shows the export dialog.M Maximizes the window to fit the screen.P Shows the print dialog.D Shows the Text/Data export dialog.Z Undo ZoomARROWS Scrolls vertical/horizontal scrollbars and moves cursor.PG-UP/PG-DOWN Pages vertical scrollbar.SHIFT+PG-UP Pages horizontal scrollbar to the right.SHIFT+PG-DOWN Pages horizontal scrollbar to the left.HOME Moves vertical scrollbar to its first position.END Moves vertical scrollbar to its last position.SHIFT+HOME Moves horizontal scrollbar to its left-most position.SHIFT+END Moves horizontal scrollbar to its right-most position.

CustomizationsAll windows have their own individual customization dialogs. The customization dialogs allowthe user to adjust visual, and functional attributes of the window as well as gain access to theExport and Maximization dialogs.

ExportingAll windows have the same exporting capabilities. Windows can export the following formatsto the listed destinations.

Format DestinationsMetafile Clipboard, File, and Printer.Bitmap Clipboard, and File.OLE Object Clipboard. (16 bit only)Text/ Data Clipboard, and File.JPEG File.

By Pressing 'X' when the window has the focus, or selecting the Export button from theCustomizations Dialog.

1. Select the type of export desired.2. Select the destination of the export.3. If available, select the size of the image to export.

4. Press the Export/Print button.


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If information is to be exported to a file, then a target filename must be entered. Click themouse over the Browse button to show the File Save As Dialog. Enter a filename and selectOK to close the File Save As dialog.

If a metafile is exporting to the printer, pressing the Print button will show the Print Dialog.Use the Print Dialog to make changes to the selected printer, orientation, paper bin, and other

printer options.

When exporting an OLE Object, the object is pasted into an OLE container. The object issupported by the OLE MiniServer PEGRPSVR.EXE.

When exporting Text/Data, pressing the Export button launches the Text/Data Export Dialog.

MaximizationMaximization is the process of resizing the window to use the entire video display. Whenmaximizing the window, the window is actually copied to a maximized dialog. The dialog(maximized window) can be closed by pressing 'Escape' or by using the mouse to click thetitle bar. Making customizations to the maximized window will not affect the original (non-

maximized) window.


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The OLM-server engineThe OLM-server engine is a software driver dedicated to gathering, buffering and forwardingdata of OLM monitor data acquisitions. The server engine is resident on a computerconnected directly or indirectly to one or more OLM-busses and with some sort of network

connection. The computer, normally located in the control room of a substation, is an ordinaryPC. The PC is not locked up, for normal use because of the server engines work, so it can beused for other tasks at the same time.

CommunicationAn OLM-server engine is configured and started ether with the OLM Installer or with theOLM Explorer software. This server then continuously scans all OLM-bus connectedOLM monitors for new data. Object data fetched in this way then is compressed and savedas files in a special folder. All communications between this server and other programs isdone trough files located in this folder or a subfolder of that. The server engine itself has nouser interface but uses a built in monitor that is a part of both the OLM Installer and theOLM Explorer. All statuses from and commands to a server are also passed, through files in

this folder. A server engine is always configured and controlled in this way.

InternetIf Internet communication is used then the contents of this folder also automatically aresynchronized with the contents of another similar folder at a specified FTP address.Monitoring data can be transported, and an OLM-server can be remotely controlled andsupervised, globally in this way.


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Install and configure a server engine

The OLM server software is installed together with the other OLM programs on the OLMinstallation CD as a Windows system service routine. The OLM server is then controlledeither with the OLM Installer or the OLM Explorer program. A configuration, with use ofOLM Installer, is done as follows.

The OLM-server computerA conventional PC-computer with a CD-ROM drive, 1-Gb free hard-disk space and at leastone serial communication port is necessary. A 1 GHz or higher processor and 512-Mb ormore of internal memory is recommended. The computer should also be connected to a localarea network (LAN), indirectly to Internet or by other means directly to Internet.

Microsoft Windows operating systems 2000 and XP are supported. No other software, exceptthe OLM Installer itself, is necessary. About the basics of and how to use the operatingsystem consult its own documentation.

The OLM-busAll communication between a server and switch monitor equipments is by an OLM-bus.This field bus consists physically of a special screened twisted pair cable, which can be daisy-chained between up to 31 units and a server. Follow instructions from the switch equipmentsupplier how to connect the OLM-bus.

The OLM-bus converterA converter is used to convert signals of a conventional serial port, on a PC-computer, to theOLM-bus format. An ordinary RS232 or USB to RS485 signal converter, with automaticdirection control, is used. Galvanic isolation between the sides is also strongly recommended.Consult the manufacturer documentation how to configure USB/RS485 serial port adapters.

Install and start an OLM-server engineFirst install the OLM software on the server computer. Start the OLM installer program butdo not connect by the Connect OLM in the File menu. In the Server menu, then click theRun OLM Server On Startup. A server engine is now started and running. To stop theserver, just click the Run OLM Server On Startup again.

Change data pathWith the Change data path.. in the Server menu is a file dialog opened. Choose or create anew folder to store the data files collected by the server. The compressed files from themonitors connected to the server are all saved in this folder. The path to this folder is also

showed in the server configuration window.


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Scan for new monitorsWith the Scan for new monitor(s).. in the Server menu is a window with some functions forthe OLM bus setup. First the connected (enabled) serial ports on the computer are shoved.The baud rate for the busses can be changed and the address interval. Do not use a slowerbaud rate then absolute necessary due to the increased data transfer time. The addresses toscan between to pick up connected monitors can be specified to speed up the scanning.

Event logWith the Event log.. in the Server menu is the information/error window for the serveropened.

OLM server configurationThere are three categories of settings for an OLM server, the OLM-server properties, theOLM-bus connections and the Internet connection. All this must be configured correctly, toallow an OLM server to work properly. Open the OLM Server Config.. window under theServer menu. There are three tabs. Under the first tab are the settings for the server itself.


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Server settingsThe following are basic settings for the server.

Server IDThe first to do is to set the id of the server. The Name, Owner, Country and the Installation

date are typed in their respective fields. This information is used to mark data from the server.A remotely connected user then can make use of this information to identify the server.

Remote controlling a serverIf the Enable remote control checkbox is checked, an external user can take control overmost functions of this server. A condition is that this user can supply a valid password. Apassword, for this, then also must be specified. The password is typed in the dialogue boxopened with the Set password button.

Server dataThe path to the OLM data folder is showed in the Data path field. It cannot be changedand is for information only. This information is used when the data transfer is done directlythrough a network.

Set password

If remote control is enabled a password optionally can be assigned to protect fromunauthorized changes of the server settings.


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OLM-bus settingsUnder this tab are all settings for the OLM-busses collected.

Add remove an OLM-busAll available OLM-busses are automatically added at restart and power on of the OLM

server computer. The number of the OLM-bus is the same as the number of the computersCOM-port used.

Disable a Switch moni torThe server searches all available busses for new Switch monitors each time the Scan BusFor New Monitor(s).. button is clicked. All new monitors found are then added to theconfiguration three. To remove a Switch monitor, just physically disconnect it and click theScan Bus For New Monitor(s).. button. To disable a Switch monitor, mark its entry in theconfiguration tree and set the priority to zero.

Change baud-rateThe baud rate of a bus, which at default is 115 200 baud, can be changed by first mark it inthe configuration tree and click the Change baud-rate button. In the appearing dialogue box

then the new baud rate is selected. Do not slow down the baud-rate, if not absolutelynecessary, due to increased data transfer time.

Change save periodicityThe status data save periodicity, for this server, is set by the value of the hour and minuteboxes. The OLM busses however are always scanned as fast as possible.

Change scan priorit yThe scan priority can be adjusted for a marked switch monitor. At default is the highest priority(1) set.


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Internet settingsThe contents of the internal OLM data folder can automatically be synchronized withanother similar OLM folder located at an Internet server. The communication then is donethrough the common FTP-protocol.

Each time a synchronize operation is performed independent if there is data to exchange the

server status file is updated. The purpose is both to remotely supervise the server engineitself and to control that the used FTP connection is running.

Set synchronize periodicit yA synchronize is done periodically, if specified by the hour and minute boxes, and at all newevents and/or alarms, if checked.

Internet settingsThe Internet address and login for the OLM data folder (Ftp 1), is specified here. For otherInternet settings are the MS Windows built-in functions used.

The address of an OLM folder at an alternative Internet server (Ftp 2) can additionally bespecified. If specified, this folder also is synchronized and contains the same data. In case aremotely connected user cannot reach the first folder, this folder alternatively can be used. Itis also possible to remotely change an Internet server address if such backup is used.

The FTP port number usually is set to 21. It can be changed, if necessary as in instructionsfrom the supplier or from an Internet service provider.

Internet communication testAfter all necessary settings have been done the file transfer communication can be tested.Use the button Test file transfer to do that.


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OLM2 switch monitor measurementsThe most important function and the base of all monitoring systems are the measuring. Theperformance and reliability of these functions decides the quality of the whole system.

Hardware performance and reliabilityIt is a careful design and use of high quality components that obtain the extremely highreliability of the OLM2 switch monitor measurements. Used operational-amplifiers, dataconversion units and resistors are selected with the best long time stability and lowestpossible temperature drift. Input protection circuits and filters are designed for a conversionlinearity better, or at least equal to, the bit resolution for the analogue conversion. Theanalogue bit resolution also is chosen, several times, higher than the specified accuracy ofthe measuring parameters.

Time measurement and sample interval accuracy is several times higher than specification.The sample rate however is chosen as a compromise between the time resolution of aparameter and its data size but it is sufficient for currently evaluated parameters.

As a switch monitor is intended to supervision of switches, a maintenance free life is required.A switch monitor is calibrated from factory and under normal circumstances then no morecalibrations are necessary.

Software calibration and methodsAll measuring values fetched from an OLM2 switch monitor are in calibrated SI standardunits. For each separate measuring parameter there is a fixed signed integer exponentrepresenting the magnitude of the value (SI-exponent). The value itself then can fit in a singlesigned integer. For each measuring parameter there are also two integer calibration constantsA and B. As the internal measuring value (imv) conversion is linear the values of theseconstants can be determined at calibration as:

The offset correction: a = A * 2^ SI-exponentAnd the gain correction: b = B * 2^ (SI-exponent -14)

If the measuring value: MV = a + b * imv

And the reference value: RV = (a + ) * b * * imvThen for two points (1, 2)

Gain correction adjustment: = (RV1 RV2) / (MV1 MV2)

And offset correction adjustment: = RV1 a * (MV1 a)

For some of the measuring inputs (those for external sensors) there also is a unit conversionfactor. The SI-exponent, A and B constants of such inputs then also are converted by thesefactors.


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Test and calibrate an OLM2 switch monitor

MeasurementsThe Measurement window under the Installation menu has functions to test and verify mostmeasuring inputs, of the OLM2 switch monitors.

Calendar time calibrationUnder the Time tab is a tool to calibrate the calendar clock of an OLM2 switch monitor.

Calendar time of the connected computer is used.

Density t ransducer inputsUnder the Density tab the measuring values, with theirs corresponding density andtemperatures, from connected transducers are showed.

Digital I/OUnder this tab is all contact status inputs showed as lamps. There are also two buttons to testthe both alarm contacts with.

Temperature sensor inputsUnder the Temperature tab is the cabinet and ambient temperature with their correspondingresistances showed. The switch monitor internal temperature is also showed here.

Analogue inputsUnder this tab is all voltage measuring inputs shoved. Only DC values of these inputs arehowever calculated.

Transducer inputsThe positions and their corresponding measuring values, for both the digital and the analoguetransducers, are showed here. Used for testing purposes only.

CalibrationA switch monitor is calibrated and tested from factory. Under normal circumstances is nomore calibration necessary. In case it is necessary to modify or repair a switch monitor the

manufacturer usually do it. However a calibration can always be done as follows, to verify itsaccuracy. A quality system also claims ability to track the calibration reference of all


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measuring systems. Even if OLM2 switch monitors always are delivered with a calibrationcertificate it also can be a way, in some cases, to better harmonize with specific quality rules.

Reference instrumentsUse calibrated reference instruments with the following minimum ranges and accuracy.

Voltage meter

Range: (0 400) V DC, accuracy: < 0,1 % of reading or < 0,1 mV

Current meter

Range: (0 1) mA DC, accuracy: < 0,1 % of reading or < 0,1 A

Time meter

Range: > 12,5 s, accuracy: < 0,25 ms

Pulse generator

Pulse width: (2 3) ms, accuracy: < 2 s

Frequency: (10 253) Hz, accuracy: < 0.01 Hz

Output: (0 18) V, impedance < 600 ohm

Optionally a time- and frequency-meter can be used together with the pulse generator, ifnecessary, to improve the accuracy.

Precision resistors

Resistor 1: 70 ohm, calibrated and marked with its value 0.01 %

Resistor 2: 135 ohm, calibrated and marked with its value 0.01 %

DC power unitVoltage output range: (0 400) V DC, ripple < 0,1 % of output or < 1 mVPower output: > 20 W

AccessoriesResistors, diodes etc as in the following points

The calibration guideStart the Calibration guide under the Calibration menu. Select the first point Voltagemonitor inputs.

Voltage monitor inputs (Pow, U1 and U2)Except for pow these inputs are used only for power voltage monitoring. Statuses read fromthese inputs are returned as, for DC voltages the value and for AC voltages the true RMS

value. Under operation these inputs are sampled and saved as vectors of momentarilyvalues.

Input specification:

Measuring range is 280 V AC/DC

Accuracy is better then 1 V

Bit resolution 0,19 V

All AC-values are calculated as the root of the mean value for the squared samples of 100ms, TRMS. The current type must be specified for each of these monitor inputs before use.Available types are DC and AC (50Hz/60Hz).


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Inputs used for line currents are sampled under operations and no TRMS values arecalculated within the switch monitor. Status AC-values are calculated as the root of the meanvalue for the squared samples of 100 ms, TRMS.

Calibration procedure

Connect the DC power unit and voltage meter or a voltage calibrator output to the inputs ct1,ct2 and ct3. The source is connected in parallel to these three input terminals and thereturn is connected to the ct ref. Follow the guide.

Analogue travel voltage inputThis input is specially designed for a resistive linear or angle transducer. If the power output(5 V) of this port is used, as reference, also a possible voltage variation to the transducer isfully compensated. At calibration and when used as a voltage measuring input however, thiscompensation is disabled.

This input also can be used as a general analogue input.

Input specification:Measuring range is (0 5) V

Accuracy is better than 10 mV

Bit resolution 1,22 mV

Calibration procedureConnect the DC power unit and voltage meter or a voltage calibrator output to the inputs trvlwip and trvl ref. Follow the guide.

Resistance measuring inputsThese inputs are adapted for PT100 class B temperature sensors with two-terminalconnection. The resistance of these sensors is a function of its temperature.

Input specification:Measuring range is (70 135) ohm

Accuracy is better than 0,1 ohmNominal measuring current is 0,56 mA

Calibration procedureConnect the DC power source and a voltage meter or a voltage calibrator output to the inputsT int and T amb in parallel. Terminal T ref is then connected to the DC power andmeasuring return. Follow the guide.


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Frequency and pulse width inputsThese inputs (dens1, dens2 and dens3) are specially designed for Trafag 8774 SF6-gasdensity sensors. This sensor returns a current pulse train on its power lines. The frequency ofthe pulses is a function of the gas density and the pulse width is a function of the temperature.

Input specification:

Frequency measuring range is (10 253) HzFrequency measuring accuracy is better than 0,1 Hz

Pulse width measuring range is (2 - 3) ms

Pulse width measuring accuracy is better than 2 s

Calibration procedureConnect these inputs (dens1, dens2, and dens3) to the pulse generator output. Use aseparate circuit, as below, between the generator and each of the three inputs. Resistor R1 iscalculated as 1 800 ohm subtracted by three times the generator output impedance and R2 is8 000 ohm. Rectifier D1 is an ordinary signal diode. Adjust the generator output voltage asbelow. Follow the OLM Installer calibration guide for Frequency inputs.

Then follow the OLM Installer calibration guide for Time inputs.

Sample period timing

The sample period time is the reference for all switch monitor time measurements. Internalsample timing reference can be calibrated in counts each on 40 ns.

Specification:

Sample time is 500 s

Accuracy is better than 100 ns

Calibration procedureRun the OLM Installer calibration guide for sample period. Connect inputs as in the figurebelow. Resistances R are 1 000 ohm. The reference time meter should start and stop at twosuccessive negative input flanks. Follow the guide.

Push the switch two times with an interval on at least 12,5 s and not more than 25 s.

1/f

18V

0V

t

Generatoroutput

8, 9, 10

11

R1

R2

D1


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Trvl 1

Trvl /1

Trvl ref

Bounce free switch

R

R

R

Trvl +5V

Referencetime meter

The OLM2 calibration is now finished.

Calibration constantsFrom the Calibration constants window under Calibration menu any of the OLM2 switchmonitors calibration- and conversion-constants can be manually modified. This is mainly fortesting and maintenance purposes and must be used carefully. These constants can also beprinted directly from Print calibration under the File menu.

PasswordChanges of the internal calibration factors are password protected. The supervisionequipment suppliers assign passwords for this.


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OLM2 switch monitor parameter data

Status dataEach time a read data command is sent to a switch monitor is a status input data record

returned. A status data record consists of:

Record Number An internal counter to keep order of the readings number.Date/Time Date/time of reading.Status Common status and for alarm events the error code.

Tamb (C) Usually used for the ambient temperature

Tint (C) Usually used for the switch cabinet temperatureHeater Current 1 (A) Heater current monitoring option 1Heater Current 2 (A) Heater current monitoring option 2Pow (V) The power line voltage used for the switch monitor itselfU1 (V) Optional power voltage monitoring 1U2 (V) Optional power voltage monitoring 2SF6 Density dens1 (kg/m3) Gas density in chamber 1

SF6 Density dens2 (kg/m3) Gas density in chamber 2SF6 Density dens3 (kg/m3) Gas density in chamber 3

Gas Temp T1 (C) Gas temperature in chamber 1

Gas Temp T2 (C) Gas temperature in chamber 2

Gas Temp T3 (C) Gas temperature in chamber 3Status a State of status contact a, (low/high)Status b State of status contact b, (low/high)Status spring State of status contact spring, (low/high)Status press State of status contact press, (low/high)Status alarm State of status contact alarm, (low/high)Status block State of status contact block, (low/high)Status res1 State of status contact res1, (low/high)Status res2 State of status contact res2, (low/high)

Operations Number of switch operations doneOperations Motor Number of motor operations doneOil pressure 0 40 MPa hydraulic oil pressureSpare Not used

Alarm dataAn alarm record consists of a status data record, of the alarm moment, with the status codeindicating the alarm cause. The structure of the data is the same as for the previous statusdata. A switch monitor keeps the latest 32 alarm records in its memory.

Operation data

Each time a switch operation is performed is a record of its data created and saved. A switchmonitor keeps the last eight operation records in its memory. An operation data recordconsists of the following numerical values:

Record Number An internal counter to keep order of the records.Date/Time Date/time of operation.Status Common status as operation types and coil

Tamb (C) Usually used for the ambient temperature

Tint (C) Usually used for the switch cabinet temperatureStroke (rad, m) Mechanical stroke of the switchOperations Switch operations counted at closeOil pressure 0 40 MPa hydraulic oil pressure option

And the following time vector values. 250 ms (500 values *0.5 ms):


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Pow (V) The power line voltage used for the switch monitor itselfU1 (V) Optional power voltage monitoring 1U2 (V) Optional power voltage monitoring 2Mechanical Travel (rad, m) Switch operation travelCoil Current (A) Coil current for close+trip1+trip2Line Current 1 (A) Line current monitoring L1

Line Current 2 (A) Line current monitoring L2Line Current 3 (A) Line current monitoring L3Status a Status contact a positionStatus a Status contact b positionStatus spring Status contact spring positionStatus press Status contact press positionStatus alarm Status contact alarm positionStatus block Status contact block positionStatus res1 Status contact res1 positionStatus res2 Status contact res2 positionStatus close trig Status contact close trig positionStatus trip tr ig Status contact trip trig positionStatus trip2/motor tr ig Status contact trip2/motor trig position

The following value is showed but is only used internally for contact-time supervision:

Operation Time (s) Calculated contact time

Motor operation dataEach time a motor operation is performed is a record of its data created and saved. A switchmonitor keeps the last sixteen motor operation records in its memory. A motor operation datarecord consists of the following numerical values:

Record Number An internal counter to keep order of the records.Date/Time Date/time of motor operation.

Status Common status as operation typeTamb (C) Usually used for the ambient temperature

Tint (C) Usually used for the switch cabinet temperatureStroke (rad, m) Full travel of a spring accumulatorSpring Time (s) Spring contact low timeOperations Motor Counted at each motor startOil pressure 0 40 MPa hydraulic oil pressure option

And the following time vector values. (20, 40, 80, 160) s, 200 values *(0.1, 0.2, 0.4, 0.8) s:

Motor Current (A) Motor coil currentU1 (V) Optional voltage monitoringSpring Travel (m) Optional spring travel monitoring

Status a Status contact a positionStatus a Status contact b positionStatus spring Status contact spring positionStatus press Status contact press positionStatus alarm Status contact alarm positionStatus block Status contact block positionStatus res1 Status contact res1 positionStatus res2 Status contact res2 positionStatus close trig Status contact close trig positionStatus trip tr ig Status contact trip trig positionStatus trip2/motor tr ig Status contact trip2/motor trig position

Note: All time vectors is synchronized with the operation start signal.


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OLM2 hardware specification summary

Number of status and timing inputs(a, b, spring, press, alarm, block, res1, res2) 8

Recommended source voltage (24 250) VDCContact voltage level (mean) 15 V

Hysteresis voltage 1 V

Voltage level accuracy 1,5 V

Contact input reaction time


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Power supply input AC (pow) (85 265) VPower supply input DC (pow) (100 300) V

Power consumption 60 daysExpected battery lifetime >15 year


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Declaration of conformity

According to

the EMC Directive 89/336/EEG, 92/31/EEG & the

Low Voltage Directive 73/23/EEG and 93/68/EEG including

amendments by the CE-marking Directive 93/68/EEG

Type of equipment

Switch monitorBrand name or trademark

OLMType designation(s)/Model no(s)

OLM2Manufacturers name, address, telephone & fax noElcon ABHyttrisvgen 27

SE-770 14 Nyhammar, SWEDEN, Tel: + 46 240 64 11 10, Fax: + 46 240 13 19

The following standards and/or technical specifications, which comply with good engineering practicein safety matters in force within the EEA, have been applied:

Standard, EMC Test report/ technical construction file/

normative document

EN50081-1, EN55011 Class B Ref. No: 00182 / Issued by:Elcon ABEN50082-2, EN61000-4-3, -6, -11, Level 3EN50082-2, EN61000-4-2, -5, Level 4EN50082-2, EN61000-4-4, -8, -9, Level 5

Standard, LVD Test report/ technical construction file/

normative document

SS-EN 61 010-1: 1993-09-30 Ref. No: 0011-001 / Issued by:Elcon ABSS-EN 61 010-1/A2: 1996-01-12

Additional informationThe product is CE-marked in 2000

As manufacturer/ the manufacturers authorized representative established within EEA,

we declare under our sole responsibility that the equipment follows the provisions of the

Directives stated above

Date and place of issue Signature of authorized person

Nyhammar 2000-12-06

Documents

OLM installer user manual r29.pdf