18
Instruction Book
IB182221EN September 2017 www.eaton.com
GE AM [Cable or Hard Bus Application]
Ground and Test Device
SECTION 5: INSPECTION & INSTALLATION
DANGER
BEFORE PLACING THE GROUND AND TEST DEVICE IN SERVICE, CAREFULLY
FOLLOW THE INSTALLATION PROCEDURE BELOW AND THE SAFE
PRACTICES SET FORTH IN SECTION 2. NOT FOLLOWING THE PROCEDURE
MAY RESULT IN INCORRECT G&T DEVICE OPERATION LEADING TO DEATH,
BODILY INJURY, AND PROPERTY DAMAGE.
When the G&T device is first used and each time it is used in the
future, it should be carefully examined and checked to make sure it
is operating correctly.
5.1 EXAMINATION FOR DAMAGE
Examine the Ground and Test Device for loose or obviously damaged
parts. Never attempt to install nor operate a damaged Ground and
Test Device.
5.1.1 NAMEPLATE VERIFICATION
Verify the information on the new G&T device matches the
information on the purchase order. If any discrepancies exist,
notify Eaton’s Electrical Services & Systems for resolution prior to
proceeding.
5.2 DEVICE AMPERAGE CONVERSION PROCEDURE
The primary circuit terminals of the Ground and Test Device consists
of cycloaliphatic bushings with silver plated copper conductor
‘knobs’. (Figure 3.3) Primary disconnecting contacts are attached
to the knobs; these primary disconnects are configured to engage
the circuit breaker compartment primary disconnects. It is critical
to confirm that 1200A primary disconnects are installed prior to
insertion in 1200A circuit breaker compartments; likewise for tests
in 2000A circuit breaker compartments. THIS CONVERSION ALSO
REQUIRES A CODE PLATE CHANGE PRIOR TO RACKING THE G&T
INTO ITS CIRCUIT BREAKER COMPARTMENT. Follow the procedure
below to convert from one primary current design to the other.
a. Move the Ground and Test Device to an appropriate work area. It
must not be inside the switchgear circuit breaker compartment
when this procedure is performed.
ote:
N
The primary disconnects of the G&T are stamped with the circuit
breaker stationary primary disconnect they are designed to fit; 1200A or
2000A.
b. Remove the existing primary disconnects installed on the G&T
using only the bushing wrench (Figure 3.3.c) provided. Any other
wrench could damage the primary disconnect knobs; they should
be avoided. (Figure 5.1)
Figure 5.1. Removing Bushing Knob
Figure 5.2. Bushing Knob Storage Area
(AM4.16 250 G&T Shown)
Figure 5.3. Bushing Knob Storage Area
(AM13.8 G&T Cable Type Device Shown)
Figure 5.4. Code Plate (AM4.16 250 G&T Shown)
