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Instruction Book
IB182217EN October 2018 www.eaton.com
50 / 75 / 150 DHP [Cable or Hard Bus Application]
Ground and Test Device
4.9 UNIVERSAL 1200A/2000A G&T CONFIGURATION
(OPTIONAL)
A special design of the DHP Ground and Test Device (G&T) allows
the separate grounding of both 1200A and 2000A circuit breaker
cubicles. Since the device can be inserted into either cubicle design,
the finger clusters and the G&T code plate must be matched to the
ampere rating of the cell stabs.
m
DANGER
FAILURE TO CORRECTLY MATCH THE FINGER CLUSTER RATINGS AND
G&T CODE PLATES TO THE CELL STAB AMPERE RATING CAN RESULT IN
DEATH, SERIOUS PERSONNEL INJURY, AND / OR PROPERTY DAMAGE.
Step 1 - Determine the ampere rating of the cell structure that is to
be grounded or tested with the G&T device.
Step 2 - Verify that the code plate is installed properly by referring
to Section 4.5 in this instruction book based on the ampere rating.
If the code plate is incorrectly mounted, remove it and remount to
match the proper ampere rating.
Step 3 - The correct finger cluster (1200A or 2000A) must match
the cell stab ampere rating prior to inserting the G&T device. If the
incorrect finger cluster is mounted on the G&T device, remove it and
install the proper finger cluster.
4.7.1 Changing 1200A Finger Clusters to 2000A
The 1200A DHP finger cluster is easily changed by removing the
5/16” hex head bolt, lock washer, and large retaining washer.
(Figure 4.6 & 4.7) Retain the hex head bolt and lock washer for
re-installation or for mounting a 2000A universal G&T finger cluster.
fingers (Figure 4.10). The finger cluster should be re-waxed each
time a finger cluster is changed or approximately every 50 insertions
and removals. The wax will not form a build-up and will not attract
dirt and contaminants if properly applied.
Figure 4.6. 1200A Finger Cluster Removal
Figure 4.7. Finger Cluster Hardware
Pull the finger cluster assembly off the G&T primary conductor.
Repeat the process for all finger clusters.
Select a 2000A universal G&T finger cluster (Figure 4.8).
Apply a thin film of wax (Johnson’s Paste Wax-available from many
retailers-used for furniture) to the outer surface of the primary
conductors (Figure 4.9) and to the inside contact surfaces of the
Figure 4.8. 2000A Universal G&T Finger Cluster
Figure 4.9. Waxing Primary Conductors
Figure 4.10. Waxing 2000A Universal G&T Finger Cluster
