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Vertiv
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+24 VDC Power System User Manual (Section 6013)
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Rev. G
178
Replacing a TPS/TLS-Type Fuse
NOTE!
Applies only if power system is equipped with TPS/TLS-type fuses.
A defective TPS/TLS-type fuse is replaced by removing the fuse carrier from the bullet nose-type fuseholder,
and replacing the defective fuse.
Refer to SAG581126000 for part numbers.
If required, pre-charge any load capacitors before installing a replacement fuse. If the List 79 Pre-charge
Assembly is provided, use the furnished clip cord lead to connect to the fuseholder terminals. Then refer to the
Pre-Charge Assembly instructions (Section 5823). This document is provided in the document set furnished
with your system.
Procedure
NOTE!
as this procedure is performed.
1.
Open the Distribution Cabinet's front door by turning and holding the captive fastener in the
counterclockwise position.
2.
Remove the fuse carrier from the mounted fuseholder body by pulling it straight out.
3.
Replace the open fuse with the same type and rating, or equivalent.
4.
Replace the alarm fuse located in the front of the fuse carrier. Replace only with a fuse of the same type
and rating. Ensure that a plastic safety cover is installed on the alarm fuse.
5.
When done, push the fuse carrier back into the 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 cabinet's front door. The door can be shut without turning the captive fastener.