Cutler-Hammer GMCP Installation Instructions

Cutler-Hammer
Installation Instructions for GMCP Motor Circuit Protector
!
DO NOT ATTEMPT TO INSTALL OR PERFORM
MAINTENANCE ON EQUIPMENT WHILE IT IS ENER-
GIZED. 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 SAFE-
TY PROCEDURES.
CUTLER-HAMMER IS NOT LIABLE FOR THE MISAP-
PLICATION OR MISINSTALLATION OF ITS PROD-
UCTS.

1-0 INTRODUCTION

The user is cautioned to observe all recommendations,
warnings, and cautions relating to the safety of person-
nel and equipment, as well as all general and local
health and safety laws, codes, and procedures.
Figure 1-1 G-Frame Motor Circuit Protector
Effective December 1998 Supersedes I.L. 15579A dated December 1993
WARNING
The recommendations and information contained herein
are based on Cutler-Hammer experience and judge-
ment, but should not be considered to be all-inclusive or
covering every application or circumstance which may
arise. If any questions arise, contact Cutler-Hammer for
further information or instructions.
General Information
The G-Frame instantaneous-only (magnetic) motor cir-
cuit protector (MCP) (Figure 1-1) is available in ratings
from 3A to 63A continuous current for motor starter
sizes 0 through 2. 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 pro-
tection as part of a combination controller where other
circuit protective functions are performed by other
devices within the controller. The MCP is suitable for
reverse feed applications. For more information, see
T.D. 29-321.
This instruction leaflet (IL) gives procedures for installa-
tion, operation, inspection, and field testing of G-Frame
MCP's.

2-0 INSTALLATION

The installation procedure consists of inspecting and
mounting the MCP, connecting and torquing the line and
load terminations, and attaching terminal shields when
required. To install the MCP, perform the following steps:
NOTICE
G-Frame MCP's are factory sealed. UL489 requires
that internal accessories be installed at the factory.
Mounting hardware (where required) is supplied in a
separate package.
2-1. Make sure that the MCP is suitable for the intend-
ed installation by comparing nameplate data with sys-
tem requirements. Inspect the MCP for completeness
and damage before mounting.
I.L. 15579B