Training - Motorpact

8/4/2019 Training - Motorpact

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MotorpactMV motor starters

Field Service Training Presentation


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Motorpact IEC_E_V0R8.ppt -Tony Narusevicius 02/2005 2

Motorpact Medium VoltageMotor Controllers

Field Service Training Presentation

Open Page for providing Instructor Information,

Course Identification Number, Etc.


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Outline

Outline 3-8

Objective 9

Safety Precaution Notice 10-11

Introduction 12-13

Main Features. 14-15 Model 1 vs Global Design 16

Applicable Standards & Certification 17

Controller Types 18

Controller Applications 19

Contactor Ratings. 20

Enclosure and Busbar Ratings 21


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Outline

Components 22 Low Voltage Compartment. 23-24

Operator Panel. 25-26

Disconnector . 27

Busbar Compartment.. 28

Load Compartment.. 29-37

Overview. 29

Contactor Cable Connection 30

Load Cable Termination 31

Power Fuses 32

Contactor. 33-34

Instrument Transformer - CT, LPCTs, CPT, VT... 35-37

Interlocks. 38-40

Without earthing switch installed

With earthing switch installed


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Outline

Standard Configurations 41

FVNR - Full Voltage Non Reversing.. 42-44

Mechanical.. 42-43

Electrical.. 44

RVAT - Reduced Voltage Auto Transformer. 45-48

Mechanical.. 45-47

Electrical.. 48

RVSS - Reduced Voltage Soft Start.. 49-52

Mechanical.. 49-51

Electrical.. 52


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Outline

Options 54 Blown Fuse Indication.. 55

Voltage Presence Indication System - VPIS 56-57

Internal Arc Class Enclosure. 58-59

Earthing Switch Assembly 60-61

MDT107 Thermal Diagnostic System 62-63

Back Light 64

Enclosure Incoming Section. 65-66

Contactor Operation 66

Installing and Removing the Contactor.. 68

Closing the Contactor 69-70

Without earthing switch installed.. 69

With earthing switch installed 70

Opening the Contactor. 71

Electrically and Mechanically 71

Closing Coil Voltage & Current 72


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Outline

Initial Start-up (General Information). 73 Preparation. 74

Low Voltage Circuits. 75

Setting and Testing Protective Relays 76

High Voltage Circuits. 77-79

Corrective Maintenance.. 80

Troubleshooting. 81-82

General. 81

Mechanism 82

Parts Replacement 83-86

Replacing Power Fuses. 83-84

Replacing & Adjusting Vacuum Interrupter. 85

Replacing Trip Latch 86

Preventive Maintenance. 87

Cell Interlocks 88

Contactor .. 89-90


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Outline

Preventive Maintenance (continued) Barriers 91

Main busbar 92-93

Low Voltage Controls 95

Protective Relays.. 96

Motor Currents - Reference chart 97-98

Instruction Bulletins 99-100

Abbreviations 101-102

Hands-on Workshop 103-104

Addendum 105

Installation of Escutcheon. 106

Removal of Escutcheon 107-108 Earthing Switch Adjustment Procedure 109-113

Pivot Lever not Releasing Interlocks.. 114


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Objective

The objective of this training is to prepare Schneider Field ServiceEngineers on the servicing of Motorpact medium voltage motorcontrollers.

Training in this presentation will cover:

an introduction to Motorpact (FVNR, RVAT, RVSS)

operation of Motorpact and components

startup

preventive maintenance and troubleshooting

Information provided in this training is intended to service as an

information supplement to Instruction Bulletins and should never

be used as a replacement for Instruction Bulletins.


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0

Safety Precaution NoticeDANGER: Hazard of Electrical Shock, Explosion or Arc Flash

Only qualified employees who can recognize and can avoid hazards associatedwith Medium Voltage Systems and are familiar with the its construction andoperation should operate, test, calibrate, maintain or trouble shoot this equipment.

The information in this presentation is not a replacement for switchgear instructionmanuals or component manuals. Always refer to the appropriate instructiondocumentation provided by Schneider Electric and other suppliers prior to servicingequipment. It is the intent of this manual to provide an overview of MotorpactMedium Voltage Motor Control Equipment.

It is assumed preventive or corrective maintenance is performed on the switchgearat intervals of 1 to 5 years depending on severity of operating conditions.

All Instructions contained within this presentation assume no preventive or correctivemaintenance will be done until the switchgear has been placed in an electrically safecondition.

All sources of energy and loads have been identified.

The loads have been removed then proper disconnects have been opened.


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1

Safety Precaution NoticeDANGER: Hazard of Electrical Shock, Explosion or Arc Flash

The disconnects have been locked out, tagged out,

Then tested for absence of voltage, using properly rated test equipmentand personal protective equipment.

And busbar is earthed using procedures appropriate for the equipment.

All low voltage circuits are de-energized and tested to insure no voltage ispresent.

Control fuses are removed.

Qualified persons must wear appropriate personal protectiveequipment (PPE) and follow safe electrical work practices wheneverworking on or near exposed energized parts. See NFPA 70E orServices Electrical Safety Procedure latest editions.

Always read and understand HAZARD labels provide on the equipmentand in documentation.


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2

Introduction


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3

Introduction

Motorpact is the name of the new line of 3 phase 50/60 Hzmedium voltage motor controller released by Smyrna, TN in 2002

Motorpact Brands

IEC

NEMA

Medium voltage motor controllers are normally used to start(switch) induction motors (Squirrel Cage) 225 kW and up becausethey do so at lower cost than low voltage motor controllers. P=E*I,when E is large, I is smaller. Therefore, cables can be smaller and

less expensive. I2R losses are also less, so operating costs areless. In some cases the cost of MV to LV transformers can beeliminated.


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4

IntroductionMain Features

Main features of Motorpact motor controllers are as follows: Rated 2400 to 7200 volts AC, line to line, 50/60 hertz.

Motor Ranges are from 75 kW (100 hp) to 3800 kW (5,100 hp).

Motor Types - Induction (Squirrel Cage).

Enclosure Types.

IP3X

IP4X

NEMA1

NEMA1A or NEMA 1 Gasketed

Internal Arc Classification Type AFLR available as an option.

Main busbar tin plated copper as standard with ratings up to 3150A.

Two basic contactor types available.

Standard - magnetically held closed.

Optional - mechanically latched closed.


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5

IntroductionMain Features

Contactors are rated 200, and 400 amperes continuous (450NEMA)

Controller interlocked for safe operation.

Standard controller cubicle width is 375 mm

500 mm and 750 mm - NEMA only

One high construction only, 950 mm deep by 2300 mm high.

Metric hardware supplied as standard.

Earthing switch available as an option

VPIS available as an option.

MDT107 thermal monitoring system available as an option.


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6

IntroductionModel 1 vs Global Design

Motorpact units built prior to February 2004 are referred to as theModel 1 (Series A) product. Motorpact units built after February2004 are referred to as the Global (Series B) product. Thefollowing chart identifies the differences between the two designs.

Feature Model 1 Global Comments

Market NEMA NEMA & IEC

LV Compartment Drawout Panel Fixed Panel

Top Wireway NoneMounted above LV

Compartment

Contactor Truck Track need cubicle width need cubicle width Not Interchangeable

Built Prior Feb. 1, 2004 After Feb. 1, 2004


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7

IntroductionApplicable Standards & Certification

Applicable IEC standards (STL qualification) IEC 60694 Common specification for high-voltage switchgear and controlgear IEC 62271-200 AC metal-enclosed switchgear and controlgear for rated voltage above

1 kV and up to and including 52 kV(replaces IEC 60298 standard)

IEC 60470 High voltage alternating current contactors and contactor based motorstarters

IEC 60282-1 High voltage fuses: limiting fuses IEC 62271-102 Alternating current disconnectors and earthing switches IEC 60255 Electrical relays IEC 60044-1 Instrument transformers - Part 1: current transformers IEC 60044-2 Instrument transformers - Part 2: voltage transformers IEC 60044-8 Instrument transformers - Part 8: low power current transformers IEC 61958 High-voltage prefabricated switchgear and controlgear assemblies

Voltage Presence Indicating Systems

Other standards UL 347, CSA 22.2, #14 and #31, NEMA ICS 3 part 2, EEMAC E14-1 IBC 2000 Seismic Standards E11 International Association Of Classification Societies (Marine)

Other certification cULus UL certification to NEMA and CSA standards


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8

IntroductionController Types

Direct On Line (FVNR) Non-reversing

Mechanically latched

Reduced Voltage Non-Reversing(RVSS, RVAT)

Motorpact SoftStart

Auto Transformer


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9

IntroductionController Applications

Compressor

Pump

Chiller

Fan

Conveyor

Chipper

Transformer Feeder

Capacitor Feeder


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0

IntroductionContactor Ratings

Minimum Voltage (kV) 2.4Max. Design Voltage (kV) 7.2

BIL (kV) 60

Frequency (Hz) 50/60

Continuous Amps 200/400A

Electrical Endurance (number of operations) 250,000

Mechanical Endurance (number of operations):

Standard

Latched type only

2,500,000

250,000

Short Circuit Interrupting Amps (RMS Sym.) 5000

Short Circuit Withstand at Rated Voltage (kA peak) 60

Short Time Rating (kA) Symmetrical:

1 Second

30 Seconds

7.5

3.0

Chopping Current (Average RMS Amps) 0.5

Switching Frequency (Ops Per Hour):

Standard

Latched type only

1200

300

Maximum Closing Time 80 ms or Less

Maximum Opening Time 25 ms or Less


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1

IntroductionEnclosure and busbar Ratings

Minimum Line to Line Voltage (kV) 1.0

Maximum Line to Line Design Voltage (kV) 7.2

BIL (kV) up to 3300 feet (1000 m) 60

Frequency (Hz) 50/60

Continuous Amps 200/400A

Short Circuit Withstand at Rated Voltage (kA Peak) Main Bus toFuse Line Side Terminal

130

Short Time Rating (kA) Symmetrical:Main Bus (2 Seconds)

0.25 Second through IM to Main Power Fuse

50

50

Dielectric Withstand (kV 1 Minute) 20

Disconnector Mechanical Life 5000


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2

Components


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3

ComponentsLow Voltage Compartment

Low Voltage Panel Protective Relay

Circuit Monitor or Power Meter

Interior Component Panels

Painted White

Provides a Mounting area for LV

control components Isolated from MV Compartment

Earthed Metal Partitions

Top Wireway

Provides termination point for LVfield wiring

Provides a 3 passage inter-unitWireway for Communication,Control and LV Power


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4

ComponentsLow Voltage Compartment


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5

ComponentsOperator Panel

Disconnector Closed Disconnector Open


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6

ComponentsOperator Panel

A: Contactor Control Panel

B: Voltage Presence Indication System - VPIS(optional)

C: Push Button for Back Light (optional)

D. Disconnector Viewing Port.

E. Indicator of Disconnector Status

F: Location for Earthing Switch OperationPadlock (optional)

G: Disconnector Operating Access Port

H. Earthing Switch operating Access Port

(optional)

I: Location for Disconnector Operation Padlock

J: Interlock Shuttle (Not provided in Model 1)

K: Procedure Pictogram

A

BC

D

G

J

E

I

H

F

K


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7

ComponentsDisconnector

Means for disconnecting controllerfrom the line or source to allow forinspection and testing.

Two position - Closed and Earthed.

Non-load break device

can interrupt CPT loads to 7 kVA

Mechanical interlock with contactor.

Viewing window for visual inspectionof the contacts. Light is available asan option.

Endurance - 5000 operations.

Arc-resistant, flame-retardanthousing.

Supports top fuse holders.


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8

ComponentsBusbar Compartment

Tin Plated Copper

No Riser busbar

Up to 3150 Amperes

Busbar Insulation available

Mounted and supported on disconnector

Single busbar for up to 5-375 mm cubicles

Reduces joints and maintenance

50 kA (2 sec) busbar Bracing


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9

ComponentsLoad Compartment Overview

Load Termination Box

Power Fuses

Vacuum Contactor

LPCT or CT

CPT and VT

CPT and VT Fuses


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0

ComponentsLoad Compartment - Contactor Cable Connection

Contactor connected to cabletermination pads

Single non-spliced InsulatedFlexible busbar System

Eliminates Joints and

Maintenance

Uses a 360 radial-Swaged cold-fused Compression Connectionat all Terminal Ends

Maintenance Free

High Reliability


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1

ComponentsLoad Compartment - Load Cable Termination

Front Access or Front and RearAccessibility

Full Height Cable Pulling Area

Load Cable Box allows for up to1-240 mm2 or 2-120 mm2

Shielded Cables /

Features a Formex flap over

cable terminations

Provides dielectric protection atthe cable terminations


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2

ComponentsLoad Compartment - Power Fuses

Power Fuses provide short circuitprotection for motor controller.

Independently mounted from Contactor

Easy to inspect and maintain

Optional Insertion and Removal Tool


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3

ComponentsLoad Compartment - Contactor

A device for starting and stopping large 3phase motors and interrupting lockedrotor currents when required.

200 A, 400 A, 450 A

DC solenoid operated

3 NO and 3 NC auxiliary contacts

furnished as standard. Lightweight at approximately 20 kg

Magnetically Held or MechanicallyLatched

Closing coils energized via an electronicdrive unit that reduces the coil currentelectronically approximately 200

milliseconds after closing coils areenergized. Dip switch on drive unitallows closing coils to be energized fromdiscreet voltages of 100 to 250 volts, ACor DC.


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4

ComponentsLoad Compartment - Contactor

ContactorConnectedPosition

ContactorRailExtended

ContactorWithdrawnPosition


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5

ComponentsLoad Compartment - Instrument Transformer - CT, LPCT, CPT, VT

LPCT or CTmounted on contactorfixed contact mouldassembly

Optional VT for protectionand metering(floor mounted)Optional fused CPT(floor mounted)

CPT and VT fuses are enclosed(Easily accessible from the front)(floor mounted)


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ComponentsLoad Compartment - Instrument Transformer - CT, LPCT

3 CTs are cast together as a 3phase assembly

Mounted behind the primary stabsin the rear of contactorcompartment.

The CT leads are permanently

attached to the CTs. There areno screw connections on the CTs

in the rear. CT connections aremade in the LV compartment.

LPCT provides low voltage (mV)output, proportional to load

current, directly to Sepam relays. Caution: CT boots (white tubes)

required to pass 60 kV BIL. Donot remove.

CT Leads

CT

CT Boot


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ComponentsInterlocks

Interlocks are mechanical parts topromote safe operation of the equipmentby not permitting the disconnector to beclosed or opened unless:

The contactor is open and the mediumvoltage door is closed and latched and the

earthing switch (optional) is in theunearthed position.

Not permitting the contactor to be closedunless:

The disconnector is closed, the mediumvoltage door is closed and the earthingswitch (optional) is in unearthed position.

The contactor (test position)can be testedthrough auxiliary circuits that are suppliedas part of the NEMA offer.

Verify Schematic)Lower Interlocks - interface withcontactor interlocks (See page 39 & 40)


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Main Interlocks - Human interface(Escutcheon removed for clarity)

Interlock connection linkagewith lower contactor interlocks

Cradle

Lower Interlocks - interface withcontactor interlocks


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Upper Interlocks Lower Interlocks

Linkage blockscontactor interlocks

Indicator arm is part of the interlocksand is attached to the operating shaft

of the contactorDisconnector Port Hasp

Moving the Disconnector PortHasp to the right moves thelinkage as shown


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Standard Configurations


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Standard ConfigurationsFVNR - Full Voltage Non Reversing - Mechanical

FVNR - Full Voltage NonReversing motor controller is themost common motor controllerconfiguration. It contains thefollowing major components

connected in series: Disconnector

HRC fuses

Vacuum contactor

Configuration is also known as acombination motor starter.

375 mm wide


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Standard ConfigurationsFVNR - Full Voltage Non Reversing - Mechanical

A: LV Control Entry

B: Inter-unit Wireway

C: LV Compartment. Door

D. LV Instrument Compartment.

E. 120 VAC Test Plug (typically NEMA)

F: Operator Panel

G: Load Terminal Pads

H. MV Compartment. Door

I: Vacuum ContactorJ: CPT and VT Fuses

K: Top Cable Entry Plate

L. Arc Resistant Vent Flaps (optional)

M: Surge Arrester location (not shown)

N: Main busbar location (not shown, mounted ondisconnector)

O: Disconnector

P: Rear Access Covers (top & bottom)

Q: Power Fuses

R: Full Height Cable Pull Area

S: LPCT or CT

T: CPT and VT

K

J

I

H

G

F

E

D

B

C

A

T

S

L

M

N

O

P

Q

R


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Standard ConfigurationsFVNR - Full Voltage Non Reversing - Electrical

FVNR 3-Line Diagram FVNR Control Circuit

These diagram examples are taken from

the following standard drawings which arenot included in the presentation. They areshown for reference purposes only.

46033-752-00 - FVNR 3-Line Diagram. 46033-641-00 - FVNR Control Circuit.

GDisconnector

IFU

CPT

CT

42M

MFR


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Standard ConfigurationsRVAT - Reduced Voltage AutoTransformer - Mechanical

RVAT - module contains theautotransformer in the bottomcompartment.

The Start and Run Contactors arein the top. They start the motor onreduced voltage.

Main contactor and disconnectorare located in the adjacent 375 mmwide cubicle .

RVAT module is available in 1125mm and 1500 mm width dependingon the size of the autotransformer.

Autotransformer is shippedseparately

NEMA also has a 750 mmenclosure

Run Contactor

Start Contactor

Autotransformer


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Typically in the NEMA markets, taps of50%, 65%, and 80% of rated voltageproduces starting torque of 25%, 42%, and64% of rated voltage starting torque.

In the IEC market, taps are generally notsupplied. The auto transformer is usuallydesigned with a specific voltage reductionto start the specific motor.

The RVAT module doors are keyinterlocked with the main contactor anddisconnector.

Surge protection is included.

50/60 Hz375 mm

Main1125 mm or 1500mm

Module


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7


A: Arc Resistant Vent Cover (optional)

B: LV Control Cable Entry Plate

C: MV Upper Door

D: Run Contactor

E: Start Contactor

F: LV Door

G: MV Lower Door

H: Drawout Cradle

I: Main busbar Compartment

J: Main busbar Access Cover

K: Earth busbarL: Door Interlock

M: Autotransformer


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8

Standard ConfigurationsRVAT - Reduced Voltage AutoTransformer - Electrical

RVAT 3-Line Diagram RVAT Control Circuit

Note: Closing Coil Driver connected for 30ms drop-out (42M)and Closing Coil Driver connected for 300ms drop-out (42S & 42R).

These diagram examples are taken fromthe following standard drawings whichare not included in the presentation.

They are shown for reference purposesonly.

46033-794-00 - RVAT 3-Line Diagram.

46033-697-00 - RVAT Control Circuit.


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9

Standard ConfigurationsRVSS - Reduced Voltage Soft Start - Mechanical

RVSS - module contains the 3phase Soft Start SiliconControlled Rectifier (SCR) stackslocated in the bottom. They arefor starting motors byelectronically controlled reducedvoltage.

Bypass contactor is located inthe top. It bypasses theelectronic module once the motorhas reached speed.

The main contactor and

disconnector are located in theadjacent 375 mm cubicle.

RVSS module is 750 mm wide.

Soft StartBypass Contactor

RVSS SCRStack Assembly


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0


The RVSS module doors are keyinterlocked with the main contactor anddisconnector. The main contactor anddisconnector must be locked open to openand access the auxiliary cubicle.

Electronic package by Motortronics Corp.

Protective relays and metering are built intothe Soft Start module.

50 / 60 Hz

Benefits, to mention a few:

Reduced Torque Starting

Smooth Acceleration

Overload, thermal capacity, undercurrent / load loss, phase imbalance

For additional information refer to InstructionBulletin 46032-700-04.

Door Interlock

SCR Stacks

Bypass ContactorLocation


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1


A: Arc Resistant Vent Cover (optional)

B: LV Control Entry Plate

C: MV Upper Door

D: LV Door

E: HMI Soft Start Control Interface Module

F: MV Lower Door

G: Heater

H: Customer Conduit Wireway

I: By-pass ContactorJ: Earth Fault Board (optional)

K: Terminal Control Board

L: Main busbar Compartment

M: earth busbar

N: Control Power & CPU Boards

O: Main busbar Access Cover

P: LV CompartmentQ: Door Interlock

R: Ring Transformers

S: Silicone Control Rectifier Stacks


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2

RVSS 3-Line Diagram RVSS Control Circuit

GDisconnector

CPT

To ControlCircuit

IFU

VTA

B

C

Main Board (MB)Terminal Block42M

42B

Soft StartSCR CKTS

Motor

PhaseB

PowerStack

PhaseC

PowerStack

PhaseA

PowerStack

120 VAC

42M

42BBX

MX BX

ContrTB

ContrTB

1

1 2

2

3

3

4

4

10 9 8 7

Soft Start TCB Board

Start Stop

1 6 7 8 9

MX

Standard ConfigurationsRVSS - Reduced Voltage Soft Start - Electrical

These diagram examples are taken from thefollowing standard drawings which are notincluded in the presentation. They are shownfor reference purposes only.

46033-727-00 - RVSS 3-Line Diagram.

46033-721-00 - RVSS Control Circuit.


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3

Standard ConfigurationsRVSS - Reduced Voltage Soft Start - Electrical

= MV

= 120V

= 28V

= Fiber Optic

GateDrive

SensingSystems

OpticalIsolation

MagneticIsolation

LVControls

Motor


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4

Options


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5

Blown Fuse Indication Assembly

OptionsBlown Fuse Indication

Blown Fuse Indication is optional.

Assembly fits on top of power fuse clipassembly and couples to an insulated shaftthat actuates a microswitch used to openthe contactor or signal a fuse has blown.

Striker pin on end of power fuse actuatesthis blown fuse indicator assembly.

Provides Mechanical and ElectricalIndication of Blown Fuse Condition

2 Form C contacts can be used for:

Blown Fuse Tripping (back-up protection forrelay)

Blown Fuse indication only

Viewing Window in MV Door for mechanicalstatus indication

Available on all controller types


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6

OptionsVoltage Presence Indication System - VPIS

VPIS is equipped with 3 neon lamps toindicate voltage presence

Basic Option, VPIS module

is located on the front of the escutcheon(operator panel) shown in the picture tothe right. (Also see Detail A on nextpage).

VPISs are wired to capacitive dividersthat are located on the load connectionbase. (See Detail B on next page).

An additional option allows for capacitivedividers to be installed near the mainbusbar/line side of the disconnector.These capacitive dividers are mountedin a cylindrical insulator. VPIS modulefor this application is mounted in the LVCompartment Door (Not Shown).

VPIS Module

O


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Motorpact IEC_E_V0R8.ppt -

Tony Narusevicius 02/2005 57

OptionsVoltage Presence Indication System - VPIS

VPIS test ports are locatedbelow the neon lamps andsuitable for testing voltagewith proper rated voltage-sensing device. Thevoltage whenever the lampsare illuminated will be 40 -600V.

Warning - VPIS is not areplacement for testing ofvoltage prior to accessingthe MV compartment.Properly rated voltagesensing device must beused to ensure no voltage is

present before performingany maintenanceprocedures.

Refer to Instruction Bulletin46032-700-01 or 06.

L1 - C

L1 - B

L1 - A

Load Connection Base

Capacitive dividers usedfor Main busbar/Line Sidconnected VPISs.

Capacitive dividers

Escutcheon

VPIS Module

VPIS Module

O i


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OptionsInternal Arc Enclosure Type AFLR

Controllers can be provided with an arc-resistant TypeAFLR rating up to 50 kA on all four sides(Front,Lateral, and Rear).

Pressure relief vent flaps for venting. Tunnel (plenum)can also be available.

Gasketing throughout enclosure, roof, rear panels, end

sheets, MV door, and between frames 8 point latching door with heavy duty vault style door

handle.

Natural interlocking of door hinge side.

3 mm sheet metal end sheets.

Compartmentalized construction.

Bolted interlocked rear panel to frame construction.

Top and bottom access panels.

Caulking of seams throughout enclosure.

O i


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Open door viewing window(IEC standard)

OptionsInternal Arc Enclosure Type AFLR

Pressure Relief Vent Flaps

Interlocking Hinge SideBolted Interlock Rear Panel

8 point latching door withheavy duty vault style doorhandle.

O ti


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OptionsEarthing Switch Assembly

Earthing switch is to earth the load cables. The earthing switch is interlocked and

cannot be closed until:

the contactor is in the open position.

the disconnector is open and in earthedposition.

the disconnector operating access port isclosed.

the shuttle is moved to the right.

When conditions are met, the earthingswitch access port can be opened and thehandle inserted to close the earthing switch

Approximately 10 turnscounterclockwise ofthe handle closes the switch and earths thecables.

Turning the handle clockwise opens theearthing switch

Disconnector Port Hasp

Shuttle

Earthing SwitchPort Hasp

O ti


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Load Box

Earthing SwitchSprings

Earth Bar

OptionsEarthing Switch Assembly

The earthing switch is housed withinthe insulating base (load box).

The earthing switch is a springoperated quick making device, capableof closing 5kA symmetrical current ( 14kA peak) at 7.2 kV 5 times.

No interrupting capability. It earths the energy in cables, motor or

transformer.

A single earth bar is located behind theface of the load box and is forced bysprings to simultaneously engage all

three phase fingers attached to thecustomers load terminal pads.

Refer to Instruction Bulletin 46032-700-06 for additional operation and safetyinstructions.

O ti


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OptionsDT1 Thermal Diagnostic System

This system provides a means of monitoring and indicating conductor temperature rises in the controllers so

corrective action can be initiated for a preset alarm or opening the contactor if over temperatures occur.

The DT1 system consists of a MDT107 electronic module (readout) and (2) CFO733 temperature sensors.The MDT107 module mounts in the LV compartment. Each temperature sensor has 3 sensor heads forattaching to the busbar.

Refer to Instruction Bulletin 46032-700-01 or 06 for rating and operation.

A. Temperature buildup setting switches

B. Ambient temperature correction setting switch

C. Red indicators (6) identifying the sensor (zone A or B) and thecircuit/sensor at the origin of the alarm

D. Green power on indicator and red 'wrench' fault indicator

E. Power supply terminals 24-250 V dc and 110-240 V ac

F. Module grounding terminal

G. Relay output dry contact connection terminals PRE-ALARM

(1NO, 20-21) ALARM' (1NCNO; 22-23-24)

Terminals 25 and 26 not used

The module's screw type connectors accept 2 wires withmaximum cross-section of 2.5 mm2.

G FE

C

B

A

D

O ti


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OptionsDT1 Thermal Diagnostic System

O ti


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OptionsBack Light

The back light assembly consists ofLEDs, a pushbutton and batteries.When the back light pushbutton ispressed, the back light illuminatesthe blades of the disconnector forvisual inspection through theviewing port.

The batteries should be replacedevery four years for properoperation.

Remove the escutcheon to accessbatteries.

Back lightpushbutton

Viewingport

Options


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Cable connections: Incoming Line Sections

1250, 2500 or 3150A.

500 mm or 750 mm wide.

500mm Left and RightLocated in lineup.

Bottom Entry only.

750 mm Left, Center andRight. Located in lineup.

Top or Bottom Entry.

Pull Box -430 mm High.

Busbar connections:

Direct busbar connection to

other MV equipment viatransitions to MCset,MasterClad, HVL, HVL/cc,VisiVac and Model 4 motorcontrollers.

OptionsEnclosure Incoming Section

Incoming Cable Connection

Controller Bay375 mm Wide FVNR

Incoming Section500mm wide

Options


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OptionsEnclosure Incoming Section

Internal Arc Vent Cover (optional)

B: LV Control Cable Entry Plate

C: MV Upper Barrier

D: MV Upper Door

E: MV Lower Door

F: VPIS Indicator Box (optional)G: MV Lower Barrier

H: LV Inter-cubicle Top Wireway

I: Capacitive Divider, VPIS (optional)

J: Surge Arresters (optional)

K: Earth busbar

L: Main busbar Lug Pad

M: Earth (earth) Riser Connection

N: Current Transformer (optional)

O: MV Cable Support Clamps (bottom entry)


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Contactor Operation

Contactor Operation


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Contactor OperationInstalling and Removing Contactor

The disconnector must be in theopen position to open the mediumvoltage door for installation orremoval of the contactor.

To Install Contactor:

Pull rail assembly down.

Place contactor on rails.

Push contactor into cell unit until thecontactor stops.

Pull rail handle up, to rack contactor intofinal connected position (approximately.10 kg force).

To Remove Contactor:

Pull rail assembly down. Contactor willdisconnect from the contacts.

Pull contactor out from the cell on therail assembly.

Lift contactor to remove from rails.Contactor Rail Assembly shown pulled down

Contactor Operation


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Contactor OperationClosing Contactor without an earthing switch Assembly

Close and latch the medium voltage door

Slide the disconnector access port hasp tothe right

Install disconnector handle in port and rotatehandle clockwise to close disconnector

Slide the disconnector access port hasp tothe left

Press the RUN pushbutton on disconnector

front operator cover to close contactor

Contactor Operation


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Contactor OperationClosing Contactor with optional earthing switch Assembly

Check that earthing switch is earthed.

Close and latch MV door.

Slide shuttle to right.

Open earthing switch port.

Insert operating handle and rotate 10 turns

clockwise to open earthing switch.

Remove handle & close earthing switch port.

Slide shuttle to left.

Open disconnector port.

Insert handle and rotate clockwise to move

disconnector blades from earthed to closed.

Remove handle and close disconnector port.

Press RUN pushbutton on pushbutton panel

above disconnector to close contactor. Earthing SwitchPort Hasp

Shuttle

DisconnectorPort Hasp

Contactor Operation


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Contactor OperationOpening the Contactor

To electrically open the contactorpress the STOP pushbutton on

front of the Disconnector operatorpanel.

Mechanically Latched Only

When control power is notavailable, to open the contactorpress the mechanical trip button onthe medium voltage door.

Contactor Operation


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Contactor OperationContactor Closing Coil Voltage & Current


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Initial Startup

(General Information)

Initial Start-up


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Initial Start-upPreparation

Prior to Start

Obtain Protective and overload relay settings from the customer.

If Sepam or other electronic relay is supplied, obtain a laptop computer and software(Sepam or other) for loading and testing relay settings.

Obtain and study all drawings (FVNR, RVAT, RVSS) associated with the motorcontrollers being installed.

Obtain and study all instruction bulletins, leaflets for motor controllers, meters, relays

and other components being installed.

At Start-up

Inspect equipment for shipping and/or handling damage. Report any damage.

Inspect controllers for proper installation

Shipping skids are removed.

Equipment is installed level and bolted or welded to the pad.

Check that all litter, tools, etc. are removed from the equipment.

Verify mechanical and electrical interlocks work on each cubicle.

Verify that the controller nameplate information matches motor nameplate dataconcerning nominal voltage, FLA, HP, etc., cubicle by cubicle.

Verify correctly rated CTs, LPCTs, CPTs, and VTs are installed per drawings.

Initial Start-up


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Initial Start-upLow Voltage Circuits

With high voltage source disconnected and earthed and all LV sourcesdisconnected, proceed cubicle by cubicle with the following:

Verify that all low voltage connections are tight and insulation is clean.

Hi-pot low voltage wiring at 1200 VAC for 1 second to verify insulation is good.

Connect test power through test plug. Do not energize high voltage circuit.

If RVSS is supplied, install and verify that Soft Start controller settings are correct per

customers specifications. Note: Special training is required to set Soft Startcontrollers.

Test that the START and STOP pushbuttons close and open the contactors.

If RVAT is supplied, verify closing and opening sequences of relays and contactorsare correct.

Placing a jumper across the CTR contact, pressing the start button should cause the relaysand contactors to pick up in this sequence: ISR, 1CR, SR, 42S, MR, 42M. This simulates the

motor starting on reduced voltage. Removing the CTR jumper causes the SR relay to drop out, 42S to drop out, ISR to drop out,

42S NC contact to close and pick up RR, 42R. This simulates the motor running on fullvoltage with main contactor 42M and run contactor 42R main contacts closed in series withthe motor. Start relay SR and start contactor 42S should be open.

Pressing the stop button should drop out all relays and contactors.

Initial Start-up


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Initial Start-upSetting and Testing Protective Relays

Install Sepam, or other protective relay, settingsper customer specifications. A laptop computerand Sepam software # SFT2841PC isrecommended for installing, or changing relaysettings, and/or testing in a Windowsenvironment.

Test Sepam relays and actually trip the contactor

by injecting simulated overcurrents (10 to 50amps) into the CT secondary terminals on eachphase which feed the relay.

Measure and record relay times.

Follow testing instructions as outlined in SepamBulletin 63230-216-208B1.

When relay is fed from LPCTs, test Sepam relayby injecting currents through an ACE917adapter. Refer to Sepam manual.

Separate training for setting and testing Sepamrelays is recommended.

Sepam 1000+base unit with fixedadvanced UMI

CCA783

SPT2842parameter settingand operating softwareSPT2826disturbance recordingdisplay software

Initial Start-up


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Initial Start-upHigh Voltage Circuits

Check each cubicle for the following:

Power fuses are the correct size per the drawing for that cubicle and thatthey have continuity.

High voltage connections are tight.

Insulation is clean and undamaged.

Load cable connections are tight.

All barriers are correctly installed.

Verify motor cables type, size and quantity/phase per customerspecifications.

Verity motor terminals are connected to correct phases for requireddirection of rotation.

If supplied; verify RVAT or RVSS cubicles are connected per drawings.The autotransformer is field installed. Refer to Instruction Bulletin 46032-700-06. Verify taps are set on same tap on each phase.

Verify Lightning Arresters (LAs) are installed correctly.

Initial Start-up


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Initial Start upHigh Voltage Circuits

Continued:

With contactor open and out of cell; hi-pot across vacuum interrupters at 10kV AC for 1 minute to verify vacuum is good. If vacuum is lost, bottle willflash over internally and it will be easy to open contact by pressing oninsulating flange. With contactor closed; hi-pot contactor at 10 kV AC for 1minute phase to phase and phase to earth to verify insulation is good. Testall the contactors.

Hi-pot main busbar at 2X rated voltage for 1 minute line to line and line toearth per instructions given under preventive maintenance to verifyinsulation is good. Disconnect VTs, CPTs and LAs during test. Close

disconnectors during this test. Close all doors and panels during this test.

Megger motor leads with 5 kV megger and verify motor circuit insulation isgood.

Disconnect test control power cord from controls.

Reinstall contactors, control fuses, VT and CPT fuses.

Energize the main busbar from actual source and verify voltage magnitudeand phase sequence are correct. Measure phase sequence with phasemeter on VT secondaries.

Initial Start-up


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Initial Start upHigh Voltage Circuits

Continued:

With the motor mechanically disconnected from the load for each motor,bump each motor momentarily to verify that the direction of rotation iscorrect.

With correct motor direction confirmed for each motor, again disconnect allhigh and low voltage from the switchgear and open all contactors anddisconnectors.

Connect the motors to the loads mechanically.

Make one final check that all litter, tools, etc. are removed from theequipment.

Close all doors and install panels.

Energize the switchgear with high voltage and low voltage.

Start-up is complete.

Motors are ready to start.


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Corrective Maintenance



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Corrective MaintenanceTroubleshooting

General Troubleshooting

Condition Action

Cannot open the medium voltage door. Make sure the disconnector is earthed.

Verify that the disconnector access ports are closed.

Check that the earthing switch is closed.

Cannot close the disconnector. Verify that medium voltage door is closed and the door

handle is fully engaged (vertical).

VPIS will not illuminate.

Test for voltage using a properly rated voltage-sensingdevice on two of the test ports on the VPIS.

Verity that the incoming cable is energized.

Cannot operate the earthing switch. Check that the disconnector is open.

Check that the medium voltage door is closed.

Check that the Shuttle is fully to the right

Cannot operate the disconnector. Check that the earthing switch (if supplied) is open.

Check that the medium voltage door is closed.

Cannot open the disconnector accessport.

Verify that the contactor is open.

Verify that the medium voltage door is closed.

Verify that key interlock keys are properly turned.

Cannot close the disconnector accessport.

Verify that the disconnector is fully earthed.

Verify that key interlock keys are properly turned.



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Corrective MaintenanceTroubleshooting

Mechanism TroubleshootingCondition Action Cannot Close the contactor electrically. Verify that the Disconnector is closed.

Verify that the Disconnector access port is closed.

Check for loose terminal connections.

Check for loose plug connector in low voltage compartment.

Check the coil circuit.

Check control fuses.

Check the electrical interlocks (see Equipment drawings).

Check linkage to the contactor and contactor interlock armassembly on the contactor for binding or hanging.

Cannot open a mechanically latchedcontactor electrically.

Check for loose terminal connections.

Check for loose plug connector in low voltage compartment.

Check the coil circuit.

Check control fuses.

Check the electrical interlocks (see equipment drawings).



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Corrective MaintenanceParts Replacement - Replacing Power Fuses

Removal of Fuses:

Always use a properly rated voltagesensing device to confirm that power isoff and wear personal protectiveequipment appropriate for the hazardwhen handling the fuses.

Open the contactor.

Place the disconnector in the earthedposition.

Close the earthing switch (if installed).

Rotate fuse and lubricate the fuse clipswith Mobil 28 red grease.

Grasp fuse by the lower end. While

gently pulling the fuse, rotate the fusebody slightly to help ease the fuseferrule out of the lower fuseholder (seefigure to right).

Note: Refer to Instruction Bulletin46032-700-01 or 06 for additionalinformation and for use of optionalFuse Tool.



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Corrective MaintenanceParts Replacement - Replacing Power Fuses

Removal of Fuses - continued:

After fuse has been removed fromthe lower fuseholder, pull the fusedown to remove the fuse from theupper fuseholder.

Installation of Fuses:

Lubricate fuse clips with Mobil 28

red grease. Grasp fuse by the upper end.

Insert fuse ferrule into the upperfuse holder. (Striker pin assemblymust always point upward).

Insert the lower end of fuse intothe lower fuseholder.

Gently push while rotating thebody to ease fuse into thefuseholder.

Note: Never insert both ends at once

Note: Refer to Instruction Bulletin 46032-700-01or 06 for additional information and for use ofoptional Fuse Tool.



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Corrective MaintenanceParts Replacement - Replacing and Adjusting Vacuum Interrupter

Replacing an interrupter assumes theinterrupter has been determined to bedefective by failing a 10 kV AC Hi-pottest or other means.

Refer to Contactor Instruction Bulletin46032-700-02 for instruction onreplacement and/or adjustment to the

Vacuum Interrupter. The main contact gap for new

interrupters is set by turning theinsulating flange until a gap of 41.5mm is obtained.

Equally important is to reset the gap

dimension on interrupters notreplaced. This is necessary to makethe contacts close simultaneously onall three phases.

Main Contact gap adjustmentof the Vacuum Interrupter

41.5 mm

WearGauge

(supplied)

VacuumInterrupter

ConductiveNut

A (M8 nut)

Insulatingflange



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Co ect e a te a ceParts Replacement - Replacing Trip Latch

Armature

Hex-Bolt (M6 x 12)

Spring Washer

Bolt (M8 x 16)

Spring Washer

Washer (Large)

Roller Assembly

Latch Assembly

Coil Rating

Base of Contactor

Trip Coil

Spring Washer

Bolt (M8 x 16)

Contactor


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Preventive Maintenance



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Cell Interlocks

Inspect and verify that cell interlocks are functioning properly.With the contactor in connected position, cell interlocks should:

Prevent closing the disconnector if the MV compartment access dooris closed, the contactor is open, and the earthing switch (if supplied) isin the earthed position.

Prevent opening the contactor medium voltage door if thedisconnector is closed.

Prevent closing the earthing switch (if supplied) if the disconnector isclosed.


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Contactor

With the contactor removed from the cell:

With contactor closed, measure contact wear ofeach interrupter. Replace interrupter(s) if 2.7 mmthick wear gauge cannot be inserted

With contactor open, hi-pot across vacuuminterrupters at 10 kV AC for 1 minute to verifyvacuum is good. If vacuum is lost, bottle will flashover internally and it is easy to open contact by

pressing on insulating flange.

With contactor closed, hi-pot contactor at 10 kVAC for 1 minute phase to phase and phase toground to verify insulation is good.

Inspect contactor closing coils and trip coils formechanically latched contactors, for evidence ofoverheating. Coil color should remain yellow and

not be turning brown or black. Observe if auxiliary contacts work and do not

show evidence of overheating. Replace asneeded.

Refer to Instruction manual 46032-700-02

WearGauge

(supplied)

Shaft

LowerFlange

Upper

Flange

2.7 mmMinimum

InsulatingFlange



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Barriers

Verify all barriers are properlyin place to meet 60 kV BILimpulse requirements:

Required barriers are located:

Over the load cableterminations at the loadtermination box mounted on

the left hand side of thecubicle.

Above the CPT at the rear ofthe cell.

Between the right handcubicle side sheet and thefuses for double barrel fuseapplications.

Loadboxflexible barrier(removable)

Loadboxflexible barrier(non-removable)

CPT barrier(non-removable)

Loadbox Flexible Barriers



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Motorpact IEC_E_V0R8.ppt -Tony Narusevicius 02/2005

92

Main busbar

De-energize the primary (high voltage) and

secondary circuits (control circuits). For rear accessible enclosures, remove the

outer panel and inner barrier from the rearof the enclosure to access the main busbarcompartment. (refer to illustration to theright).

For front accessible only enclosures you

must access the main busbar through thelow voltage compartment (refer toillustration on next page).

Inspect main busbar insulation andinsulators for cracks, treeing or otherevidence of insulation damage ofdeterioration.

If insulation is wet or damp, eliminatewater leak source. If insulation isdirty wipe clean.

Replace damaged insulation orinsulators as needed.

Accessing the busbar compartment in rearaccessible FVNR enclosure



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93

Main busbar

Continued

Inspect busbar and joints foroverheating such as discoloration.

Check and tighten all busbarconnections to 50 Nm...

Replace any damaged parts.

Prior to hi-potting the main busbar:

Remove the contactors from eachcell.

Do Not remove the power fuses forthis testing. (Can be jumped preventfuse damage)

Remove the VT fuses and CPTs.

Disconnect the LAs.

Close MV compartment doors.

Close the disconnector to the ON

position in each cell.

The earthing switch (if installed) mustbe in the open position.

Remove the Main busbar Access Panelin the Low Voltage Compartment on FVNR



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94

Main busbar

Continued

Hi-pot the main busbar line to lineand line to earth at 2X nominal voltsAC for 1 minute to verify mainbusbar insulation is good. The testvoltage can be injected directly onthe main busbar, or back fed

through one of the contactor cells,after defeating the interlocks.

Reconnect LAs, reinstall VT fuses

and CPTs on completion of testing.

Refer to Instruction Bulletin 46032-700-01 or 06 for additional

instruction.

Insulated Main busbar



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95

Low Voltage Controls

Prior to de-energizing the equipment for

maintenance: Verify that all meters and indicator lights

are working and functioning properly.

During shutdown of equipment.

Replace faulty lights and meters.

Check that all LV connections are tight.

Clean LV wiring and compartment asneeded.

Verify that all low voltage controls workelectrically and mechanically.

Danger: If any CT secondary circuit isopened for any reason duringmaintenance, it is mandatory that atemporary jumper be placed across the

CT at the CT terminal block An opencircuited CT can generate thousands ofvolts on the secondary terminals if theprimary winding is carry any current.

Note:

Following tools/parts needed toinstall and crimp 25 amp. male andfemale pins on blue connectors onrear of contactor:

Crimp tool #9501-0

turret head #9502-1

Insert tool #9099-0-0-0 Remove tool #9081-0-0-0

Male pin #MC114NR

Female pin #FC114NR

Jumpers



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96

Protective Relays

Sepam overcurrent relays do not

require periodic preventivemaintenance or secondary currentinjection test to verify if relays areworking. They continuously testthemselves.

Current injection testing is

recommended to verify Sepamrelays work correctly when themotor controllers arecommissioned.

Refer to Sepam Instruction Bulletin63230-216-208B1.

Sepam 1000+base unit with fixedadvanced UMI

CCA783

SPT2842parameter setting

and operating softwareSPT2826disturbance recordingdisplay software


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7

Motor Currents Reference Chart

Motor Currents


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8

Reference Chart

HP FLA 6 X FLA 15 SEC HP FLA 6 X FLA 15 SEC

300 75 449 3R 300 43 259 2R350 87 524 3R 350 50 302 2R

400 100 599 4R 400 58 346 2R

450 112 674 4R 450 65 389 3R

500 125 749 5R 500 72 432 3R

600 150 898 6R 600 86 518 3R

700 175 1048 9R 700 101 605 4R

800 200 1198 12R 800 115 691 4R

900 225 1348 13R 900 130 777 5R

1000 250 1497 16R 1000 144 864 6R

1250 312 1872 2 X 9R 1250 180 1080 9R

1500 374 2246 2 X 12R 1500 216 1296 13R

1750 437 2620 2 X 13R 1750 252 1512 16R

2000 499 2995 2 X 16R 2000 288 1728 19R

2250 561 3369 2 X 19R 2250 324 1944 2 X 9R

2500 624 3743 3 X 16R 2500 360 2160 2 X 9R

3000 749 4492 3000 432 2591 2 X 13R

3500 873 5240 3500 504 3023 2 X 16R4000 998 5989 4000 576 3455 2 X 19R

4500 1123 6738 4500 648 3887 3 X 16R

5000 1248 7486 5000 720 4319 3 X 16R

PF=.85, EFF.=.85 30 SECONDS MAX ACCELERATION TIME

2400 VOLT 4160 VOLT


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9

Instruction Bulletins

Instruction Bulletins


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0

Description BulletinNumber

Comments

Motorpact Medium Voltage MotorControllers, Model 1 (Series A)

46032-700-01 Model 1 (Series A) Only

Motorpact 200/400/450A VacuumContactors Class 8198

46032-700-02 Bulletin applies to bothModel 1 and Global

Motorpact Medium Voltage Soft

Start

46032-700-04

Motorpact Medium Voltage MotorControllers, Global (Series B)

46032-700-06 Global (Series B) Only

Motorpact Application Guide 8198DB0101 Sales BulletinSepam 1000+ Model 20 DigitalRelay

63230-216-208B1


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0

Abbreviations

Abbreviations


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0

BIL Basic Impulse Level

CT Current Transformer

CPT Control Power Transformer

FLA Full Load Ampere

FVNR Full Voltage Non Reversing

HMI Human Machine Interface

HP Horse Power

HV High Voltage kV Kilo Volt

KVAC Kilo Volt Alternating Current

LA Lightning Arrester

earthing switch earthing switchAssembly

VPIS Voltage Presence IndicationSystem

LPCT Low Power Current Transducer

LV Low Voltage

MV Medium Voltage

O/L Over Load

RMS Root Mean Square

RVAT Reduced Voltage AutoTransformer

RVSS Reduced Voltage Soft Start

SCR Silicon Controlled Rectifiers

VA Volt Ampere

VT Voltage Transformer

(Potential Transformer)


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0

Hands On Workshop

Hands On Workshop


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0

BIL Test

Operate Interlocks

Defeat Interlocks

Install & Operate Contactor

Replace Fuses

Operate earthing switch

Install Trip Latch

Measure Interrupter wear

Replace Vacuum Interrupter

Hi-pot & Test controls

Set & Test Sepam Relay

Set & Test Soft Start Controller Review DT1 Temperature Monitor System


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0

Addendum

AddendumInstallation of Escutcheon


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0

Installation of Escutcheon

Equipment State:

Contactor open

Disconnector open

Earthing switch closed

1. Reference Assembly Drawing. 46035-439-53.

2. Open both the Low Voltage and Medium Voltage Doors.

3. Align Escutcheon with hasps and all other features.4. Push onto Upper Interlocks.

5. Make sure that the Indicator pin is seated in the Indicator Slide.

a. Verify engagement by attempting to move the slide with your finger.

b. Do not tighten any screws until pin is seated in slide.

6. Once the escutcheon is in place, secure the escutcheon and barrier

with four screws and washers (2 at top and 2 on the bottom).

5

AddendumRemoval of Escutcheon when MV door cannot be opened


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0

Removal of Escutcheon when MV door cannot be opened

Option 1 (Preferred) :1. Cut two pieces off bottom flange of the escutcheon.

2. Remove two top screws from upper flange of escutcheon.

3. Pull escutcheon forward to remove.

Note: Uses of a thin sharp tool will be needed to fit between the bottom of the escutcheon and the top of the MV Door.

CUT

AddendumRemoval of Escutcheon when MV door cannot be opened


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0

Removal of Escutcheon when MV door cannot be opened

Option 2:

1. Cut escutcheon horizontally from side to side just below the viewing window.2. Remove the 2 bolts from the top of the escutcheon.

3. Remove the top half of the escutcheon.

4. Relieve any condition that keeps the MV door from opening.

5. Once MV door is open, remove the 2 screws in the bottom flange of the escutcheon.

Cut

AddendumEarthing Switch Adjustment


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0

1/4-3/8(7mm 10mm)Exposed Threads

earthingswitchOperatorLeadscrew

earthing switchThreadedCoupler

earthing switchRodWeldment

Jam Nut

Thread the coupler down tothe jam nut (do not tighten)BEFORE threading thecoupler onto the operatorleadscrew.

Figure 1 Figure 2

Earthing Switch Adjustment

1. With the earthing switch assembly in the closed (earthed) position, turn the Jam Nut on the earthingswitch Rod Weldment to position it 7mm - 10mm (1/4 - 3/8) from the bottom of the threads (Figure 1).

2. Thread the earthing switch Coupler onto the earthing switch Rod Weldment, down to the Jam Nut, but do nottighten (Figure 2).



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1


3. With the earthing switch Operator Leadscrew in the lowered position, thread the

Coupler on to the earthing switch Operator Leadscrew @ 3 - 4 full turns.4. Turn (crank) the earthing switch Operator clockwise to move the earthing switch

to the open Loaded position. After 7 - 8 turns, visually check the position of thetop (head) of the earthing switch Operator Leadscrew - it should be near itsupper limit of travel. Continue turning the Operator SLOWLY until resistance isevident. Visually observe the position of each of the following:

a. Top (head) of the Operator Leadscrew (Figure 3).

b. Position of the earthing switch Pivot Link to the earthing switch RodKeeper (Figure 4).

THE PROPER ADJUSTMENT FOR THE OPEN LOADED POSITION IS

ACHIEVED WHEN THE TOP (HEAD) OF THE LEADSCREW TOPS OUT ATMAXIMUM TRAVEL IN THE EARTHING SWITCH OPERATOR HOUSING(FIGURE 3) AT THE SAME TIME THE EARTHING SWITCH PIVOT LINK TOPS

OUT (OR STOPS) AGAINST THE EARTHING SWITCH ROD KEEPER(FIGURE 4).

If instead, the pivot link tops out against the rod keeper before the Leadscrewtops out, causing the rod keeper to bend or flex, then the earthing switch Couplermust be backed off (counter clockwise) from the Leadscrew to achieve the propersetting.



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1


The relationship of the pivot link to the operator leadscrew is controlled by the turning of the coupler.

A 13mm crowfoot wrench with a socket extension can be used to access and adjust the coupler while the operatorleadscrew is in the top (maximum) position. If such a tool is not available, then the operator leadscrew can be lowered untilthe coupler is accessible with a 13mm open end wrench and incremental adjustments made until proper setting is achieved.

Leadscrew topped out (Max.Travel) in the earthing switchOperator Housing

earthing switchOperator Housing

earthing switch Pivot Linkposition against the RodKeeper Rod Keepershould NOT Bend or Flex

Rod Keeper

Pivot Link

Slot Link

Figure 3 Figure 4



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1


5. When the proper earthing switch open Loaded adjustment is achieved, turn the

earthing switch Operator counterclockwise to move the earthing switch to theclosed (earthed position. After 7 - 8 turns, start visually observing the movementof the pivot link. The pivot link should not move until the slot link hastraveled to the opposite end of the slot and has bottomed out against thescrew/ bushing on the rod keeper (Figure 5).

Continue to Slowly turn the earthing switch Operator until the earthing switch

assembly closes quickly (fires) to the earthed position (Figure 6) and the earthingswitch door interlock retracts to allow opening of the Medium Voltage door.There should be no evidence of binding or resistance during closure/earthing ofthe earthing switch assembly.

6. When all adjustment are complete and proper earthing switch function isachieved, the jam nut must be tightened against the coupler with a 13mm openend wrench.



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1


(1.) Slot Link must travel to opposite (bottom)end, against the pivot screw/ bushing BEFOREthe (2.) pivot link moves away from the rodkeeper.

(1.) Slot Link

(2.) Pivot Link

Figure 5

earthed Position: Indicator

Pin is Bottomed Out inRadial Slot

Tighten jam nut againstcoupler when adjustmentsare complete

Figure 6

AddendumPivot Lever not Releasing Interlocks


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Pivot Lever not Releasing Interlocks

1. Open medium voltage door and defeat interlocks.

2. Inspect the pivot lever attached to the left side sheet fordeformation and function.

3. If deformed replace with new part 46032-907-02.

Pivot Lever

Documents

Training - Motorpact