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UM582127000 User Instructions
Issue AC, January 2, 2013 Spec. No. 582127000 (Model 721NPBB)
Page 30 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 TPH Fuse
Procedure
Note: Refer to Figure 4-4 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 grasping its
handle and pulling straight out.
3) Remove the open fuse from the fuse carrier and replace it with the same type
and rating.
4) Push the fuse carrier securely back into the mounted fuseholder body.
5) On the distribution panel, locate the open alarm fuse associated with the TPH
fuse being replaced. Replace the alarm fuse with the same type and rating.
Ensure that a plastic safety cover is installed on the alarm fuse.
6) Close the distribution cabinet’s front door. Turn the latch clockwise to secure the
door.
Figure 4-4
Replacing a TPH Fuse
Fuse
Fuse Carrier
Fuseholder Body