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Amphenol Network Solutions
All rights reserved. 12.20.19 130316-8
509.926.6000 — amphenol-ns.com
High-Power GMT
Series Fuse Panel
WARNING! Use only UL-listed circuit breakers or UL-recognized component secondary protection
devices.
22. Insert the proper sizes of GMT fuses in the designated fuse holders using the designation card to identify
circuits. If applicable, install color-coded designation pins to match the fuses.
23. Check the voltage and polarity at
input of loads.
24. After all the designated GMT fuses have been installed, check that the
FAIL ALARM
LED is still green.
Again, test the alarm relay contacts at the R, V, A, F ALM pins on the rear of the panel. As before:
•
Expect continuity (0
Ω
) between Terminals
C
and
NC
•
Expect an open circuit (
∞Ω
) between Terminals
C
and
NO
25. If available, replace one of the fuses with a blown fuse and check that the
FAIL ALARM
LED changes to red.
Check the R, V, A, F ALM pins again:
•
Expect an open circuit (
∞Ω
) between Terminals C and NC
•
Expect continuity (
0Ω
) between Terminals C and NO
26. When finished, re-install the operable fuse.
27. If desired, wire wrap the remote external audio/visual alarm indicator wires (solid copper wires, #22 to #18
AWG) to the alarm terminals.
28. One by one, re-enable the load equipment and verify proper operation.
29. Re-install the terminal cover.
1.4.2 Replacing the Alarm Board
If the alarm LEDs or other alarm functions are not operating
properly, you may remove the alarm circuit board and
replace it at the front of the fuse panel.
It is not necessary to remove power or otherwise take the
fuse panel or the equipment it is feeding out of service to
perform alarm board replacement.
Contact the factory for a replacement alarm board. (See
“Parts & Accessories” below.) When replacing an alarm
board, ensure that the keyed connector at the rear wall of
the panel mates properly with the new board.
Plastic clips hold
alarm board to
front of the panel
Fig. 9: Alarm board