User Instructions UM582127000
Spec. No. 582127000 (Model 721NPBB) Issue AC, January 2, 2013
Chapter 4. Troubleshooting and Repair Page 27
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Replacing a TPS/TLS Fuse
Procedure
Note: Refer to Figure 4-2 as this procedure is performed.
1) Open the distribution ca binet’s front door by turning the latch in the
counterclockwise position.
2) Remove the fuse carri er from the mounted fuseholder body by pulling it straight
out.
3) Remove the open f use 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 s ecurely 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 Alarm s are active.
7) Close the distribut ion 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
FuseCarr ier
FuseholderBod y
TPS/TLS Fuse
Polarizing Keyway
MatchesKey on
Bottom of Fuse Carrier
Fuseholder AssemblyExploded View
FuseholderAssembly (P/N 117201) includes
body& carrier, alarm fuse, and alarmfuse safety cover.
Insert these terminals
intoco rresponding sockets
ondist ribution panel.
GMT-X
SafetyFuse Cover
(Replacement
P/N248898700)
GMT-18/100A
AlarmFuse
(Replacement
P/N248610301)