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UM582127000 User Instructions
Issue AC, January 2, 2013 Spec. No. 582127000 (Model 721NPBB)
Page 26 Chapter 4. Troubleshooting and Repair
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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 Distribution Device
General
Replace distribution devices with the same type and rating. Refer to System Application
Guide SAG582127000 for part numbers.
Distribution Fuse “Alarm Fuse” Replacement
If a distribution fuse opens, the associated alarm fuse opens. Replace the distribution
fuse before replacing the alarm fuse.
Procedure
1) An alarm fuse is removed by pulling it straight out of the fuseholder. If the alarm
fuse is located in a modular fuse carrier, hold the fuse carrier in place with your
thumb while pulling on the alarm fuse to prevent the entire carrier from
inadvertently being pulled out.
2) Safety fuse covers are provided for all Bussmann GMT type fuses installed in the
system. These covers snap onto the fuses and provide protection from exposed
electrical terminations when a fuse opens. Insure that the safety fuse cover is
installed after replacing a fuse. Refer to Figure 4-1 for installation details.
Figure 4-1
Installation of Safety Fuse Covers
Safety Cover
P/N 248898700
(GMT-X)
Safety Cover
P/N 102774
(GMT-Y)