Rockwell Automation Allen-Bradley MCP Handbuch

Instruction Leaflet for Installation of Q-Frame

Motor Circuit Protector, Type MCP (with Electronic Trip Device)

WARNING

CONTACT WITH ENERGIZED EQUIPMENT CAN

RESULT IN DEATH, SEVERE PERSONAL INJURY,

SUBSTANTIAL PROPERTY DAMAGE. DO NOT

AlTEMPT TO INSTALL

PERFORM

MAINTENANCE ON EQUIPMENT WHILE IT

ENERGIZED. ALWAYS VERIFY THAT NO VOLTAGE

PRESENT BEFORE PROCEEDING WITH THE TASK,

AND ALWAYS FOLLOW GENERALLY ACCEPTED

SAFETY PROCEDURES.

ALLEN-BRADLEY

NOT LIABLE FOR THE

MISAPPLICATION

OR MISINSTALLATION

OF ITS

PRODUCTS.

The user is cautioned to observe all recommendations,

warnings,and cautions relatingto the safety of personnel

andequipmentas well as all general and local healthand

safety laws, codes, and procedures.

The recommendationsand informationcontained herein

are basedon Allen-Bradleyexperienceandjudgement,

but should not be consideredto be all

inclusive or cover

ing every application or circumstancewhich may arise. If

any questions arise, contact Allen-Bradleyfor further

informationor instructions.

INTRODUCTION

to comply with the applicable requirementsof Underwrit-

ers Laboratories,Inc. Standard UL489 and the Interna

tional ElectrotechnicalCommission Recommendations

The MCP is aUL

recognizedcomponent. It is

used primarilyto provide short

circuit protec

tion

as part of acombinationcontrollerwhere othercircuit

protectivefunctions are performed by other devices

within the controller.Since the Q

frame MCP is a non-

sealed device, it is marked LINE and LOADand is not

. IEC947

suitablefor reversefeed applications.

Fig. 1-1 Q

frame TypeMCP Motor Circuit

Protector

INSTALLATION

The installationprocedureconsists of inspectingthe

MCP and, as applicable, installingaccessories, and ter

minals; mountingthe MCP; connecting the line and load

conductors;torquing terminals; and attaching terminal

shields.The MCP, accessories, mounting hardware, and

unmountedterminals may be supplied in separate pack

ages.

installthe MCP, performthe followingsteps.

Note: Internal accessory installation in any type of

circuit breakershould be done beforethe circuit

breaker is mounted and connected. Refer to individ-

40752-081(1) Effective 2/03

Bul. 140M

in 3-pole frames only. The MCP is designed

of 600A. . The MCP is available as Type MCP

Motor Circuit Protector (MCP) (Fig. 1-1) has a rating

The Q-Frame instantaneous (magnetic-only)

General Information

This instruction leaflet (IL) gives procedures for installa-

tion, operation, and field testing of Q-frame MCPs.

For this publication, the term motor circuit protection

(MCP) shall also include instantaneous (magnetic)

only circuit interrupters.

Page

Terminal

Cat. No.

Terminal Screw

Material Head

Body TY Pe

ualaccessory instructionleafletsfor specific instal

lation instructions onfield installable accessories.

1. Compare nameplate data with existing equipment

ratingsand system requirementsto makesure that

the MCP is suitablefor the intended installation.

Priorto mounting,confirm that the MCP has not

been damaged during transit or initial handling.

2. To installinternalaccessories, removecover screws

and cover.

Note: The MCP handle must be inthetripped or

OFF

positionto remove the cover.

3. If not already installed, mountaccessories (if

required) in MCP.

Note: When required to be removed or replaced, sta

tionary interphase barriers can only be installedor

removed with circuit breaker inthe tripped or open

position.

AWG Wire

Range

MetricWire Wire

Range (MM') Type

After any internal accessories are installed, and

with the MCP inthe tripped position, makesure that

stationary interphase barriers are properly installed

in base. Installcover and secure with panhead

screws. Torque to 20

22 Ib

in. (2.26

2.49 N.m).

If not already installed, mountwire connecting ter

minalsas shown in Fig.2

1. Securetheterminals to

the MCP usingtwo panhead slotted screws and

lockwashers. Torque to 6

8 Ib

ft. (8.14

10.85 N.m).

With the MCP mountedand beforethe conductors

are installedand conductor clamping screws

inserted,the terminal mountingscrews may be

checked for correct torque.

Table

Terminal Types

000

Aluminum Socket

Copper Socket

WARNING

250

350

400

500

250

350

THE VOLTAGES INENERGIZED EQUIPMENT CAN

CAUSE DEATH

SEVERE PERSONAL INJURY.

BEFORE MOUNTINGTHE MCP INAN ELECTRICAL

SYSTEM, MAKESURE THERE IS NO VOLTAGE

PRESENTWHERE WORK ISTO BE PERFORMED.

Note: Dependingontheequipmentconfiguration, the

MCP can be mounted usingdifferent styles of hard

ware. Thefollowing steps describe howtomountthe

MCP usingstandard hardware.When special hard

ware isneeded(for example, with the motor opera

tor), the instructionleaflet describing the accessory

also describes the special mounting arrangements.

6. To mount the MCP, performthe following steps:

120

185

240

120

300

For individualsurface mounting,drill mounting

panel using the drilling plan shown in Fig. 2

For panelboard mounting,only load end support

mounting holes are required. For dead front

cover applications,cut out cover to correct

escutcheon dimensions,see Fig. 2-3.

If MCP includesfactory or field installed internal

accessories, make sure accessory wiring is

accessiblewhen the MCP is mounted.

Note: Labels with accessory connection schematic

diagrams are provided onthe side of the MCP.

c. PositionMCP on mounting surface.

Torque Value

in. (N.m)

275 (31.l)

400 (45.2)

The maximumwidth nonstandardwire connector (tang

type) or bus bar connectorthat can be usedwithout reducing

electrical clearance and creepage distances between phases is

1.690

inches.

hardwareor connector should be installed in a mannerto reducethe electrical clearance betweenthe underneath side

of the phasetermination (line or load) and ground without the addition of supplementary insulation.

The metric conductor sizes indicatedare the minimum/maximum sizes that can be inserted inthe terminal. Largersize

conductors may be requiredto satisfy ampacity requirementsfor local installation rules.

40752-081(1) Effective 2/03

140U-QTLA2

140U-Q-TLC2

Aluminum Socket

Aluminum Socket 4-4/0 25-120 Cu/Al

Cu/Al

Contact Allen-Bradley for availability.

4/0-600 275 (31.1)

Page

d. InstallMCP mounting screws and washers.

Tighten screws firmly, but

not exceed28 Ib

in.

(3 N.m).

CAUTION

WHEN ALUMINUM CONDUCTORSARE USED,THE

APPLICATION

A SUITABLEJOINT COMPOUND

RECOMMENDEDTO REDUCETHE POSSIBILITY

TERMINAL OVERHEATING.OVERHEATINGCAN

CAUSE NUISANCETRIPPING AND DAMAGETO THE

MCP.

Connect line and loadconductors and accessory

leads.

8. After the MCP is installed,check all mounting hard

ware and terminal connecting hardwarefor correct

torque loading.Torque valuesfor line/loadterminals

are given inTable 2

1 and on the MCP nameplate.

9. Installlineterminal cover on MCPcoverwith mount

ing screws provided.Torqueto 20

22 Ib

in. (2.26-

2.49 N.m).

2-10. When step

type terminals are used

terminal shields(suppliedwith terminals) must

be installed on the MCP (Fig. 2

4) and secured

using retainerand screws includedwith theterminal

shield kit. Warning labelsupplied with the kit must

be attachedto the MCP cover.

WARNING

HAZARDOUSVOLTAGE CONDITIONSCAN CAUSE

DEATH

SEVERE PERSONAL INJURY. MAINTAIN

ORIGINAL ELECTRICALCLEARANCEAND

CREEPAGE SPACINGS AT TERMINATIONS.

Panhead Screws

Panhead 140U-Q-TLC2 and Lockwashers

Screws or (Installed before

and 140U-Q-TLA2 Cable Clamping

Terminal Lug Lockwashers Terminal Lug Screws)

Fig.

TerminalInstallation

Line End

0.250-20

(M6

.O)

Tap

Holes)

Pole MCP

Load End

Dimensions in Inches

(Millimeters)

Fig.

Pole MCP Mounting Bolt DrillingPlans

40752-081(1) Effective2/03

Page

Line End

Pole

MCP

3.438

(87.33)-w

1.719

(43.66)

3.281

(83.34)

2.292

(58.22)

Load End

Fig.2

3 MCP Escutcheon CutoutDimensions

for

pole

MCP

REPLACEMENT

EXISTING MOTOR CIRCUIT

PROTECTORS

Panel EscutcheonCutout Sizes

Existingcutouts must be modifiedto agree with

requirementsshown in Fig.

Existing handle mechanisms may needto be

modifiedor replaced.Consult Allen-Bradley for

additional information.

Only Q

Frame accessories may be

used.

Motoroperators must be replaced.

Key interlock mountingbrackets must be

replaced.

Consult Allen-Bradley for replacementstyles.

Terminals must be replaced, see Table

for

replacementtypes.

Unless noted above, all other physicalcharacter

isticsare the same.

HandleThrow Positions

InternalAccessories

ExternalAccessories

Terminal Wire Connectors

Other

WARNING

CONTACT WITH ENERGIZED EQUIPMENT CAN

RESULT IN DEATH, SEVERE PERSONAL INJURY,

SUBSTANTIAL PROPERTY DAMAGE.

NOT

ATTEMPT TO INSTALL

PERFORM

MAINTENANCE ON EQUIPMENT WHILE IT

ENERGIZED. ALWAYS VERIFY THAT NO VOLTAGE

PRESENT BEFORE PROCEEDING WITH THE TASK,

AND ALWAYS FOLLOW GENERALLY ACCEPTED

SAFETY PROCEDURES.

Note:When replacingan existing

MCP

or circuit

breaker

the types listed above, make sure the volt

age, continuous current, and interrupting rating

the new

MCP

are suitable.

40752-081(1) Effective 2/03

Page

MANUAL OPERATIONAND TRIP UNIT

ADJUSTMENT

ManualOperation

Manualoperation of the circuit breaker is controlled by

the MCP handle and the PUSH

TRIP button in the

trip unit. The MCP handle has three positions,two of

which are shown on the cover with raised letteringto indi

cate

and OFF. On the handle,

ON,

OFF, and TRIP

are also shown by a color

coded strip for each MCP han

dle position: red for

ON,

white for TRIP, and greenfor

OFF (see Fig. 4

1).

MCP Reset

After a trip operation, the MCP is reset by movingthe

MCP handleto the Reset (extreme OFF) position.

Note: Inthe event of an automatictripping operation,

no MCP should be reclosed until the cause of trip is

known and the situation rectified.

PUSH

TRIPButton

The PUSH

TRIP buttonoperatesthe MCP tripping

function and may be usedto periodicallyexercisethe

operating mechanism.The rating plug in electronictrip

unitscontains the PUSH

TRIPbuttonwhich is oper

ated by finger pressure.

ElectronicTrip Unit Adjustment

The instantaneoustrip level of the trip unit can be

adjusted by rotatingthe adjustment switchon the front

face of the trip unit with a screwdriver. The switch has

several settings as indicatedon the nameplatewith let

ters A through H (Fig.4

1). The ampere settings are

shownonthe MCP nameplateand in Table4

1. To adjust

the setting, rotatethe switch clockwise until arrow on

switch pointsto desired setting.

Trip Units

For additional informationon electronictrip units, referto

INSPECTIONAND FIELDTESTING

MCPs are designedto provideyears of almost

maintenance

freeoperation.The following procedure

describes how to do a limited amount of field inspection

and testing of an MCP.

Inspection

MCPs in service should be inspectedperiodically.The

inspectionshould includethe followingchecks 5

through

WARNING

THE VOLTAGES IN ENERGIZEDEQUIPMENTCAN

CAUSE SEVERE PERSONAL INJURY

DEATH.

BEFORE INSPECTINGTHE MCP IN AN ELECTRICAL

SYSTEM, MAKE SURE THE MCP

SWITCHEDTO

THE

OFF

POSITIONAND THAT THERE

VOLTAGE PRESENTWHERE WORK

TO BE

PERFORMED.

CAUTION

SOME COMMERCIAL CLEANING AGENTS WILL

DAMAGETHE NAMEPLATES

MOLDED PARTS.

MAKE SURE THAT CLEANINGAGENTS

SOLVENTS USEDTO CLEANTHE MCP ARE

SUITABLE FOR THE JOB.

5-1.

5-2.

5-3.

5-4.

5-5.

Remove dust, dirt, soot, grease, or moisturefrom

the surfaceof the MCP using a lint

free dry cloth,

brush, or vacuum cleaner.

not blow debris into

MCP. If contamination is found, look for the source

and eliminatethe problem.

Switch MCPto

and OFF several times to be

sure that the mechanical linkagesoperatefreely

and do not bind. If mechanicallinkagesdo not oper

ate freely, replace MCP.

With the MCP in the

position, pressthe PUSH-

TRIP buttonto mechanicallytrip the MCP. Trip,

reset,and switch MCP

several times. If mecha

nism does not reset each time the MCP is tripped,

replacethe MCP.

Check base,cover, operating handle,and handle

barrierfor cracks, chipping, and discoloration. MCP

should be replaced

cracksor severe discoloration

is found.

Checkwireconnectingterminals andothertype bus

bar connectors for loosenessor signs of overheat

ing.Overheatingwill show as discoloration,melting,

or blisteringof conductor insulation,or as pitting or

meltingof conductorsurfacesdue to arcing. If there

is no evidenceof overheatingor looseness,do not

disturb or tighten the connections. If there is evi-

40752-081(1) Effective2/03

Instruction Leaflet 40752-072

Page

5-6.

5-7.

5-8.

dence of overheating,terminations should be

cleaned or replaced.Before re

energizingthe MCP,

all terminations and cablesshould be refurbishedto

the originally installedcondition.

Check MCP mounting hardware, and tighten

nec

essary.

Exposureto certain types of chemicals can cause

deteriorationof electrical connections. Check area

where MCP is installedfor any safety hazards,

includingpersonalsafety and fire hazardsand take

requiredprecautionary actions.

The operationof MCPswith electronictrip unitscan

be field tested periodically using the electronic test

kit. Contact Allen-Bradley for details.

FieldTesting

Any field testing should be done in accordancewith appli

cable NEMA Standard.

Table

InstantaneousTrip Settings(Amperes)

Cam

Setting

MCP Catalog Number

1800

2400

3000

3600

4200

4800

5400

6000

1000

1250

1500

2000

2500

3000

3500

4000

500

600

800

1000

1250

1500

2000

2500

Handle

Position

Indicator

International

Symbols

-ON

Color: Red

OFF

White

TRIP

Green

OFF (Reset)

lnstahtaneous

Trip PUSH

TRIP

Adjustment Button

Electronic Switch

Trip Unit

Fig.

MCP Manual Controls

40752-081(1) Effective 2/03

140M-Q8P-D60 140M-Q8P-D40 140M-Q8P-D25

Page

NOTES

40752-081(1) EffectiveJ2/03

Page 8

40752-081(1) Effective: 2/03

Printed in USA/TQC

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