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User Instructions UM582127000
Spec. No. 582127000 (Model 721NPBB) Issue AC, January 2, 2013
Chapter 4. Troubleshooting and Repair Page 27
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Systems, North America, Inc. Any copying, use, or disclosure of it without the written permission of Emerson Network Power, Energy Systems, North America, Inc. is strictly prohibited.
Replacing a TPS/TLS Fuse
Procedure
Note: Refer to Figure 4-2 as this procedure is performed.
1) Open the distribution cabinet’s front door by turning the latch in the
counterclockwise position.
2) Remove the fuse carrier from the mounted fuseholder body by pulling it straight
out.
3) Remove the open fuse from the fuse carrier and replace it with the same type
and rating.
4) Replace the alarm fuse located in the front of the fuse carrier with the same type
and rating. Ensure that a plastic safety cover is installed on the alarm fuse.
5) Push the fuse carrier securely back into the mounted fuseholder body. Note that
a polarizing key on the bottom of the carrier prevents the carrier from being
inserted upside down.
6) Verify no Fuse Alarms are active.
7) Close the distribution cabinet’s front door. Turn the latch clockwise to secure the
door.
Figure 4-2
Replacing a TPS/TLS Fuseholder and/or Fuse
Fuseholder Assembly
Longer Side
to the Bottom
Shorter Side
to the Top
Fuse Carrier
Fuseholder Body
TPS/TLS Fuse
Polarizing Keyway
Matches Key on
Bottom of Fuse Carrier
Fuseholder Assembly
Exploded View
Fuseholder Assembly (P/N 117201) includes
body & carrier, alarm fuse, and alarm fuse safety cover.
Insert these terminals
into corresponding sockets
on distribution panel.
GMT-X
Safety Fuse Cover
(Replacement
P/N 248898700)
GMT-18/100A
Alarm Fuse
(Replacement
P/N 248610301)