• Reliability, Safety, Economy.

• Modularity (up to 32 analogue or144 digital channels) andexternal compatibility.

• 12/16 bits resolution and 1,2 to 10 kHz/0.1 to 50/60 Hzsampling rates.

• Integrated fault location function

The purpose of the electricalgeneration, transmission anddistribution systems is to provide theelectrical power end users with safe,reliable and dependable electricity.This in turn requires that thecompanies and industries installhigh performance monitoring anddiagnostic systems.

This instrument is the result ofconsiderable experience combinedwith the most advanced micro-processor-based technologies,in order to meet the users' needsand requirements.

Indeed, the consequences ofdisturbances on the electricalnetwork can occasionally result inconsiderable financial losses bothfor the power generation companiesas well as the end users.

"Managing", i.e. working to preventand eliminate disturbances byevaluating them via the use ofMiCOM M840 disturbancerecorders, has become one of thekey elements to improve thereliability of electricity companiesand industries alike.

However, further to the diagnosissystems evolution, the volume ofdata to be processed increases, aswell as the amount of analysis workrequired. This is where theMiCOM M840 can best beapplied.Its’ capabilities considerably reduceanalysis time without sacrificing anyother of its’ functions.

Feature enhancementsdesigned to improveperformanceAccelerated fault diagnosis andsource finding by analysis oftriggering on calculated channels,negative, positive and zerosequence voltages and currents,etc), representative of the realphenomena encountered on thenetworks and in the industries.

Ability to register very short durationtransient disturbances Samplefrequency:

• from 1.2 kHz to 10 kHz (50Hz)

• from 1.44 kHz to 9.6 kHz (60Hz)

• Capacity to register slowdisturbances, set samplefrequency: 6.4 kHzRecording period:• from 10s to 15 days, 12 hours,

49 min. and 37s (50 Hz)corresponding to: from 0.012Hz to 50 Hz

• from 10s to 12 days, 22 hours,41 min. and 21s (60Hz)corresponding to: from 0.014Hz to 60 Hz

16-bits resolution on the ACanalogue channels, therebyguaranteeing extremely accuratemeasurements.

Fault location function incorporatedinto the recorder,thus instantly available.

Modular and expandable system,able to satisfy future needs.

Records stored on a protected,internal mass memory so as to avoidany spurious loss of information.

Reduction in communication time bymeans of high performance datacompression and transmissionprotocols.

Compatibility of the system withother devices such as recording andfault simulation instruments(IEEE COMTRADE).

Access protection using passwords.

2

MiCOM M840

The configuration can be fully madeby software, on the front panel(option), locally or remotely via aPC, in order to minimize the on siteoperations.

Designed to integrate asystemThe architecture of theMiCOM M840 is based on the useof standardized components (VMEbus, etc.) which enables integrationinto existing electrical installationautomation and protection systemsand allows it to interface with thefollowing components:

• Battery power supply,

• Switched or privatecommunication networks (opticfibers, hertzian network, etc.),

• Synchronization and timeresetting (compatible with externaltime pulse, IRIGB, GPS, etc.).

Adaptable capacityThe MiCOM M840 is fully modularand can therefore be configured toaccomodate the number of analogueand digital channels to be monitored.With a maximum unit capacity of32 analogue channels and 64 digitalchannels, or alternately only 144 digital channels, Win DRManager recorders can be linkedand synchronized together to providemonitoring of large electricalnetworks.

Recording of faultycharacteristicsThe response time required for thefaults to be recorded by the MiCOM M840 can be either fixed,or automatically adjusted to suit thechoice of application, so as to takeinto account the full scope of thefault. Adjustable hysteresis, reboundfiltering and repetitive fault devicesare also provided to guard againstrecording spurious phenomena.

• Integrated computation functions(harmonics, RMS values, table ofpower values, etc.),

• Vectorial representations,

• Optimized fault location,

• Black and white or colourprintout,

• Import export ability with otherfault processing devices incompliance with IEEECOMTRADE standard format.

3

Win DR Manageranalysis

and operatingstation

Other faultanalysis andsimulationdevices

Colourprinter

Colourprinter

Additional Win DR Manager

station

Other ALSTOMrecorders

Externalsynchronization

(Time pulse, GPS,IRIGB, etc)

Modem

Modem

IEEECOMTRADE

Private line,telephone

line

M840 M840M840M840

Modem

Modem

Optic fibersLocal networkPrivate line,Telephone line,Hertzien beam

Private line,Telephone line,Hertzien beam

Modem

O.F. ModemAdaptor

Operating and analysisunitInstalled on a standard PC, the WinDR Manager software enables localor remote configuration of therecorders, as well as the analysisand viewing of the data acquiredby any recorders of the ALSTOMrange (TPE 2000, EP-EPC, MiCOM M840):

• Retrieval of records, either inmanual or automatic mode,

• Multi-windows graphic analysis,

Win DR Manager

General

• Basic configuration expandableby modules,

• Front panel with optionalkeyboard and screen (VT 100emulation),

• Database generation/modificationon front panel or by PC in local orremote mode,

• Autotest with visual or externalalarm (relay),

• External time pulse, GPS, IRIGB…compatible synchronization,

• Settings and software informationstored in mass memory,

• Alarm relays and externalcontrols.

Direct channels

• Modules with 8 AC voltages anddirect current analogue channels, 16 bits resolution and galvanicinsulation,

• Modules with 4 AC/DC voltagesand current analogue channels, 12 bits resolution and galvanicinsulation,

• Modules with 16 digital channelsfitted with anti-rebound filters andisolated by photocouplers,

• Frequency modules (optional).

4

Functional characteristics

ANALOGUE ACQUISITIONBOARDS

(1 to 32 channels)Galvanic insulation

U

IAnalogue

inputs

Analogueinputs

Hz

Synchronizationclock and time pulse

Externaltriggering

48-120 VDC220 VDC110 VAC220 VAC

DIGITAL ACQUISITIONBOARDS

(1 to 64 channels or 144channels). Insulation by

photocouplers

CPU BOARD…WITH COPROCESSOR

WITH 16 MB RAM

FRONT PANEL(SCREEN/KEYBOARD)

(optional)

Alarms,external commands

B&W/printer

Modem, Win DR Managermaster station

Local link, Win DR Managermaster station orVT100 emulation

> 2 Gb HARD DISK(extension optional)

BUS

VME

BUS

SCSI

SERVICINGBOARD

FILTERED POWERSUPPLY

MiCOM M840 INTERNAL BLOCK DIAGRAM

Computed channels

• Zero sequence voltages and/orcurrents,

• Positive sequence voltagesand/or currents,

• Negative sequence voltagesand/or currents,

• Phase to phase voltages.

Triggering

• Up to 3 programmable triggeringcriteria for each direct orcomputed analogue input:

• min and/or max thresholds,

• variation (derived),

• frequency variation (option),

• 2 programmable triggeringcriteria per digital channel

• rising edge status change,

• and/or falling edge,

• By external contact (dry contact orapplication of a voltage from 24to 250V DC) triggering can beinitiated on request or by anotherrecorder in the case of highcapacity systems.

Fault locationThe M840 incorporates a faultlocation function on the monitoredline, whether the fault is initiated insingle phase, two phase, threephase, in isolated or earthedconfiguration. The distance to thefault location is documented onprintout or during graphic analysis.Mostly, location accuracy is within 2%.

Sampling

• Sampling rate: to beprogrammed:

• slow sampling rate in RMSvalues from: 0.1 Hz to 50/60Hz (option)

• from 1,200 to 10,000 Hz, (50 Hz) or from 1,440 to, 9,600 Hz (60 Hz).

Duration of recording andstorage capacity

• Pre-fault time to be programmedfrom 0.1 s. to 2 s.,

• Post-fault time to be programmedfrom 0.3 s. to 20 s. with choice ofautomatic extension(retriggerable),

• Storage on > 2 Gb mass memory,for example 1000 x 1 secondrecords sampled at 10 KHz, on 16 analogue channelsand 32 digital channels.

Printout

• Locally or remotely, on most blackand white printers,

• All records can be printed outeither fully or partially,automatically or on request, by thefollowing ways:

• when starting a recording andwhen a fault is located,

• selection of particular channelsonly,

• selection of a portion of a record,

1

2

4

5

6

7

M840

3

8

9

10

5

1 - Simplified record header:A detailed header can beprinted out on request. Itcontains the description ofeach channel and its’ nominalvalues, and other data.

2 - Pre-fault recording

3 - Triggering (Instant 0)

4 - Fault recording

5 - Post-fault recording

6 - Fault cause and location (type,distance) with furtherinformation described indetailed header.

7 - Header for each channel

8 - Amplitude markers:Values for each channelindicated in the detailedheader.

9 - Graduation at 10 ms intervals.Value indicated at 100 msintervals, negative beforetriggering, positive after.

10 - Triggering of a protection(digital channel, no.1).

• Sub-sample restoration (at a lowersampling speed than for theacquisition sampling),

• restoration of curve ranges,

• full restoration.

Communication/Interfaces

The MiCOM M840, designed tocommunicate, contains interfacesthat enable the following functions:

On input:

• Synchronization by external timepulse, GPS and IRIG B clock, andtime resetting function,

• Transmission of records and dataautomatically or on request, by:

• standardized local network(optional),

• private line, hertzian network, etc.,

• telephone line, STN,

• optic fiber, etc.

• Direct connection to a standardprinter, or to a PC for datatransmission by RS 232 seriallink.

• Triggering on an external pulseeither from another EPMF or fromany other device, by applying aDC voltage or closing a freecontact,

• Configuration of settings locally orremotely via a PC, the Win DRManager or the MiCOM M840front panel.

On output:

• Control of triggering and externalsynchronization,

1

2

4

5

6

7

M840

3

8

9

10

Power supply48-120 VDC , 220 VDC, 110 VAC, 220 VAC, ± 15% 100 VA typical

Analogue inputsAC channels: 8 channels/board

• 16 bits resolution

• Voltage channels: 140 VAC or260 VAC

• Current channels: throughexternal shunts or CTs.

• Burden < 0.1 VA

• Bandwidth 2-2,500 Hz

• Accuracy 0.5%

AC/DC channels: 4 channels/board

• 12 bits resolution

• Voltage channels: 0 to 600 VDC

• Current channels: through shunts

• Burden < 0.1 VA

• Bandwidth: DC - 2,500 Hz

• Accuracy 3%

Fast Sampling rate

• 50 Hz: 1,200 to 10,000 Hz step400 Hz

• 60 Hz: 1,440 to 9,600 Hz step480 Hz

Slow Sampling rate

• 50 Hz: 0.012 Hz to 50 Hzrecord duration: 15 Days 12 Hours 49 Min.

• 60 Hz: 0.014 Hz to 60 Hz record duration: 12 Days 22 Hours 41 Min.

Digital inputs16 channels/board

• Voltages: 24-250 VDC

• Burden < 0.5 mA

• Time resolution:1 ms

Symmetrical components

• Zero sequence, Positive sequence,Negative sequence, voltage andcurrent

Frequency inputs 4 channels/board

• Voltage: 18 - 180 Vrms

• 37.5 Hz - 75 Hz

• Resolution: +/- 0.01 Hz

• Accuracy: +/- 0.1 Hz

Internal clock

• Absolute date, hour, minute,second

Time synchronisation

• GPS / IRIG-B

• Voltage pulse

• Master/slave RS 485 pulse

Recording parameters in fastsampling rate

• Pre-fault time: 0.1 s. to 2 s. step 0.1 s.

• Post-fault time: 0.3 s. to 20 s. step 0.3 s. automatically expandable

Internal memory

• 16 Mb

Mass memory

• 1 Gb, 2 Gb (option)

• Storage of 2,000 s. of faultssampled at 5 kHz for 2 feeders

Setpoints selection fortriggerings

• Analogue channels, Symmetricalcomponents, Frequency channels:minimum and/or maximumthreshold, minimum and/ormaximum of rate of change

• Digital channels: rising and/orfalling edge.

Communication

• Protocol: standard modemprotocol, compatible withWINDOWS™ 95/98/NTenvironment

• Speed: 300 to 19,200 Bauds

• Interfaces: optical fibre (option),leased lines, STN

• Direct transfer to PC

• Corporate LAN link betweenmore than one Master Station

Alarms

• Record in progress

• Memory full (20 - 80%)an internal fault (selfcheck result)

• Loss of synchronization

• CPU memory overflow, etc.

• Type 50 VA resisitive

Environment

• Dielectric withstand (CM): 2.5 kV - 50 Hz , IEC 600255-5

• Insulation resistor: > 100 M Ω(500 VDC CM) , IEC 600255-5

• Electrical shock: 1.2/50 µS, 5 kV , CM and DM ,IEC 600255-5

• Damped 1 Mhz sinus wave: CM2.5 kV, DM 1 kV,IEC 600255-22-1,IEC 61000-4-12

• Fast transient: 2 kV,IEC 61000-4-4

• Electrostatic discharge: contact 4 kV, air 8 kV, IEC 61000-4-2

• Electromagnetic compatibility: IEC 61000-4-3 10 V/m

• Radiated and conductedemission: EN 55011 (CISPR 11)

• Susceptibility: ENV 50141 (IEC 61000-4-6) , ENV 50140 (IEC 61000-4-3), ENV 50204

• Sismic test: IEEE C37 98

• Temperature:operating -10°C + 55°C,storage -20°C + 70°C

• Relative humidity:85% at 40°C (not condensing)

• Other applicable standards:ANSI/IEEE C 37.90

Dimensions and weight

• 19 inch rack, 7U

• Weight: 32 kg maximum

• Dim.: 310 x 419 x 440casing dim.: 310 x 458 x 440(fan)overall dim.: 310 x 490 x 440 (H x D x W).

6

Technical specifications