4
Instruction Book
IB182221EN September 2017 www.eaton.com
GE AM [Cable or Hard Bus Application]
Ground and Test Device
SECTION 1: INTRODUCTION
The purpose of this book is to provide instructions for receiving and
handling, storage, installation, operation and maintenance of the
General Electric Type AM-4.16 and 13.8 Ground and Test Devices.
This Ground and Test (G&T) device is designed to be used in existing
General Electric Type AM-4.16 and 13.8 metal-enclosed switchgear.
GE AM manual Ground and Test Devices are designed for insertion
into the circuit breaker compartment to gain access to the primary
stationary contacts. It provides convenient means to:
1. Ground a circuit for maintenance work;
2. Apply potential for cable testing; and,
3. Access both bus and line circuits for “phasing out” tests.
CAUTION
BECAUSE OF THE UNIQUE APPLICATION AND VAST VARIETY OF SYSTEM /
USER REQUIREMENTS, SPECIFIC SAFE OPERATING PROCEDURES FOR THE
USE OF THIS DEVICE MUST BE DEVELOPED BY THE USER.
WARNING
SATISFACTORY PERFORMANCE OF THESE GROUND AND TEST DEVICES
IS CONTINGENT UPON PROPER APPLICATION, CORRECT INSTALLATION
AND ADEQUATE MAINTENANCE. THIS INSTRUCTION BOOK MUST BE
CAREFULLY READ AND FOLLOWED IN ORDER TO OBTAIN OPTIMUM
PERFORMANCE FOR LONG USEFUL LIFE OF THE GROUND AND TEST
DEVICES.
THESE GROUND AND TEST DEVICES ARE PERSONNEL PROTECTIVE
DEVICES, AS SUCH, THEY ARE MAXIMUM RATED DEVICES. THEREFORE,
THEY SHOULD NOT UNDER ANY CIRCUMSTANCES BE APPLIED OUTSIDE
THEIR NAMEPLATE RATINGS.
1.1 AVAILABLE GE AM GROUND AND TEST DEVICES
Refer to Table 1.
Table 1. GE AM Ground and Test Device Availability and Interchangeability
Nominal Voltage Class
(kV)
Existing Circuit Breaker
MVA Rating
Existing Circuit
Breaker Rated
Continuous Current at
60 Hz (Amps)
Rated Short-Circuit Time Current
kA / RMS / Symmetrical
Rated Momentary Current
kA / Peak
BIL Capability
(kV)
4.16 (Hard Bus Type Device)
250
1200 / 2000
36
97
60
4.16 (Hard Bus Type Device)
350
3000
49
132
60
13.8 (Cable Type Device)
500
1200
23
62
95
13.8 (Hard Bus Type Device)
500
1200 / 2000
23
62
95
13.8 (Hard Bus Type Device)
750
1200 / 2000
36
97
95
