Allen-Bradley 140M Installation Instructions Manual

C

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Installation Instructions for 140M JD-Frame
Motor Circuit Protector

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DO NOT ATTEMPT TO INSTALL OR PERFORM
MAINTENANCE ON EQUIPMENT WHILE IT IS ENER­GIZED. DEATH, SEVERE PERSONAL INJURY, OR
SUBSTANTIAL PROPERTY DAMAGE CAN RESULT
FROM CONTACT WITH ENERGIZED EQUIPMENT.
ALWAYS VERIFY THAT NO VOLTAGE IS PRESENT
BEFORE PROCEEDING WITH THE TASK, AND
ALWAYS FOLLOW GENERALLY ACCEPTED SAFE­TY PROCEDURES.

ALLEN-BRADLEY IS NOT LIABLE FOR THE MIS­APPLICATION OR MISINSTALLATION OF ITS
PRODUCTS.

The user is cautioned to observe all recommendations,
warnings, and cautions relating to the safety of person­nel and equipment as well as all general and local
health and safety laws, codes, and procedures.

WARNING

BUL. 140M

The recommendations and information contained herein
are based on Allen-Bradley experience and judge­ment, but should not be considered to be all-inclusive or
covering every application or circumstance which may
arise. If any questions arise, contact Allen-Bradley for
further information or instructions.

1. INTRODUCTION

General Information

The JD-frame instantaneous (magnetic)-only
motor circuit protector (MCP) (Fig. 1-1 ) has a rating of
250A for application with NEMA motor starter sizes 4
and 5. The MCP is available in 3-pole frames
only. The MCP is designed to comply with the
applicable requirements of Underwriters Laboratories,
Inc. Standard UL489 and the International
Electrotechnical Commission Recommendations No.
IEC 157-1 .

The MCP is a UL-recognized component under file
E7819. It is used primarily to provide short-circuit pro­tection as part of a combination controller where other
circuit protective functions are performed by other
devices within the controller. Since the JD-frame MCP is
a non-sealed device, it is marked LINE and LOAD and
is not suitable for reverse feed applications.

Figure 1-1 JD-Frame Motor Circuit Protector

40752-165(1) Effective March 2008

This instruction leaflet (IL) gives procedures for installa­tion, operation, inspection, and field testing of JD-frame
MCPs. For this publication, the term motor circuit
protector (MCP) shall also include instantaneous (mag­netic)-only circuit interrupters.

2. INSTALLATION

The installation procedure consists of inspecting the
MCP and, as applicable, installing accessories, inter­phase barriers and terminals; mounting the MCP; con­necting the line and load conductors; torquing terminals;
and attaching terminal shields. The MCPs, accessories,
mounting hardware, and unmounted terminals may be

supplied in separate packages.

NOTICE

Internally-mounted accessories are listed for field
installation under UL File E64983. Accessory instal­lation should be done before the MCP is mounted
and connected. Refer to individual accessory
instruction leaflets.

To install the MCP, perform the following steps.

Page 2

2-3. Install accessories.

CAUTION

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WHEN REMOVED AND REINSTALLED, THREAD­FORMING SCREWS WILL TRY TO REFORM THE
THREADS IN THE BASE. CARE SHOULD BE TAKEN
EVERY TIME A THREAD-FORMING SCREW IS USED
TO ENSURE THE SCREW STARTS IN THE ORIGI­NAL THREADS. DAMAGED THREADS CAN RESULT
IN IMPROPER MCP COVER RETENTION.

TA250KB Terminal

Terminal
Connectors

Collar

2-1. Make sure that the MCP is suitable for the intended
installation by comparing nameplate data with existing
ratings and system requirements. Inspect the MCP for
completeness, and check for damage before mounting.

NOTICE

Perform Steps 2-2, 2-3, and 2-4 only if installation of
internal accessories is required.

2-2. Remove cover screws and cover.

①

➁

➁

①

➁

➁

Also
Used
with
4-Pole
Circuit
Breaker

Collar

Socket
Screw

Flat Head
Screw

T250KB Terminal

Figure 2-2 Terminal Installation

2-4. Install cover and secure with pan-head screws, fol­lowed by thread-forming screws, as shown in Fig. 2-1.

2-5. If not already installed, mount terminals as shown in
Fig. 2-2. When using aluminum body terminal (Catalog
No. TA250KB), secure the terminal to the MCP using a
1/8-inch socket wrench, and torque to 6-8 Ib-ft (8-11
N.m). After mounting the MCP and before installation of
the conductors, check or retighten the terminal mounting
screw through the terminal. Conductor securing screw
must be removed for this check. When using non-alu­minum body terminal (Catalog No.T250KB), secure the
terminal to the MCP using screw and flat nut. Torque
the screw to 8-lb-in (1 N.m.).

Nut

①

① Screw, .190-32 x 3.13 Inch, Pan-Head, Cross-Recessed
➁ Screw, No. 8 x 1.88 Inch, Pan-Head, Cross-Recessed,

Thread Forming

Figure 2-3 Cover Screw Installation Positions

40752-165(1) Effective March 2008

①

THE VOLTAGES IN ENERGIZED EQUIPMENT CAN
CAUSE DEATH OR SEVERE PERSONAL INJURY.
BEFORE MOUNTING THE MCP IN AN ELECTRICAL
SYSTEM, MAKE SURE THERE IS NO VOLTAGE
PRESENT WHERE WORK IS TO BE PERFORMED.

!

WARNING

1.375
(34.37)

.688
(14.47)

Page 3

a. For individual surface mounting, drill mounting panel
using the drilling plan shown in Fig. 2-3. For deadfront
cover applications, cut out cover to correct escutcheon
dimensions. (See Fig. 2-4.)

4.078
(103.58)

C MCP

7.250
(184.15)

C MCP

L

Handle

L

Handle

.250-20
(M6-1.0) Tap
(4 Holes)

Figure 2-3 MCP Mounting Bolt Drilling Plan

1.562

.344R
(8.74)

.718

.188R
(4.77)

(39.67)

.781
(19.84)

2.922
(74.22)

C Circuit

L

.875

.350

(88.90)

C Circuit Breaker Handle

L

(22.22)

Breaker
Handle

b. If MCP includes factory- or field-installed internal
accessories, make sure that accessory wiring can be
reached with the MCP mounted.

NOTICE

Labels with accessory connection schematic dia­grams are provided on the side of the MCP. A note
should be made of the diagrams if the labels cannot
be seen when the MCP is mounted.

c. Position MCP on mounting surface.
d. Install MCP mounting screws and washers. Tighten

screws firmly, but do not exceed 28 pound-inches (3 N.m).

CAUTION

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WHEN ALUMINUM CONDUCTORS ARE USED, THE
APPLICATION OF A SUITABLE JOINT COMPOUND
IS RECOMMENDED TO REDUCE THE POSSIBILITY
OF TERMINAL OVERHEATING. TERMINAL OVER­HEATING CAN CAUSE DAMAGE TO THE MCP.

2-7. Connect line and load conductors and accessory
leads.

2-8. If required, install interphase barriers.
2-9. If required, install terminal shield on MCP cover

with mounting screws provided.

Figure 2-4 MCP Escutcheon Dimensions

NOTICE

Depending on the equipment configuration, the
MCP can be mounted using different styles of hard­ware. The following steps describe how to mount
the MCP using standard hardware. When special
hardware is needed (for example, with the electrical
operator), the instruction leaflet describing the
accessory also describes the special mounting
arrangements.

2-6. To mount the MCP, perform the following steps:

40752-165(1) Effective March 2008

2-10. After the MCP is installed, check all mounting
hardware and terminal connecting hardware for correct
torque loading. Torque values for line/load terminals are
given in Table 2-1 and on the MCP nameplate.

3. MANUAL OPERATION AND TRIP DEVICE
ADJUSTMENT

Manual Operation

Manual operation of the MCP is controlled by the MCP
handle and the PUSH-TO-TRIP button in the trip device.
The MCP handle has three positions, two of which are
shown on the cover with the international symbols 1/0
and raised lettering to indicate ON and OFF. On the
sliding handle barrier, ON, OFF, and trip are also shown

E