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1.5.2 Installing GMT Fuses
ALERT
!
ALERT! Only install UL-listed or R/C Supplementary Protectors in the output fuse
holder positions.
Install GMT fuses by pushing them into place. Insert “phoney” fuses in unpowered circuits. Verify
output circuit polarity at the equipment end, using standard techniques. Correct as needed.
1.5.3 Testing the Fuse Alarm Relays
ALERT
!
ALERT! Never use fault current to test fuses or the fuse alarm system! Doing so can
cause hazardous conditions, equipment damage, or equipment service interruptions.
Test fuse alarm relays using standard operating company procedures.
1.5.4 Fuse Alarm Visual Indicator Test
Observe the KLM-PDP’s alarm card while performing the following test for fuse alarm
visual indicators:
Figure 6 - Fuse Alarm Card
1. Install a known, good, correctly rated fuse in any KLM position. The alarm card’s Alarm LED
for that position is off (unlit).
2. Remove the fuse you just installed. The alarm card’s Alarm LED for that specific KLM will turn
on (RED). (GMT LED will remain off.)
If the red KLM Alarm LED does not illuminate,
a. Verify that the fuse is absent or a “phoney” fuse is present.
When the fuse is...
Remote Alarm relay
closure status is...
Visual indicator (KLM Alarm
LED) is...
Activated, Blown, or Absent
C-NO
ON (RED)
Present and good
C-NC
GREEN
