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User Instructions UM582127000
Spec. No. 582127000 (Model 721NPBB) Issue AC, January 2, 2013
Chapter 4. Troubleshooting and Repair Page 31
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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 TPL-B Fuse
Procedure
Note: Refer to Figure 4-5 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 case from the mounted fuse block by grasping its handle and
pulling it straight out.
3) Open the fuse case.
4) Remove the open fuse from the fuse case and replace it with the same type and
rating.
5) Close the fuse case.
6) Push the fuse case securely back into the mounted fuse block.
7) Replace the alarm fuse located in the front of the TPL-B fuse block. Replace
only with a fuse of the same type and rating. Ensure that a plastic safety cover is
installed on the alarm fuse.
8) Close the distribution cabinet’s front door. Turn the latch clockwise to secure the
door.
Figure 4-5
Replacing a TPL-B Fuse
Fuse Case
Open Fuse Case View
TPL Fuse
Fuse Installed in
Open Fuse Case
(rear view)
Fuse Installed in
Closed Fuse Case
(rear view)
Fuseblock
(P/N 516241)
GMT-18/100AAlarm Fuse
(P/N 248610301) and
GMT-X Safety Fuse Cover
(P/N 248898700)
(Both are provided
w/ fuseblock)