UPS 120, UPS 150, UPS 250, UPS 300, UPS 301, UPS 500, UPS 600, UPS 750 and UPS 900 Uninterruptible Power Supplies Caterpillar


Fuse (Flywheel Cabinet)

Usage:

UPS 250 APZ

Description



Illustration 1g01275782
Location of the left panel fuse
(1) Fuses (F25 - F28)
(2) AC input fuses (F1 - F3)


Illustration 2g01275787
(3) Field coil driver fuses (F29 - F30)
(4) Filter fuses (F4 - F6)

The left panel of the cabinet holds the following fuses: four transformer fuses and three AC Input fuses. The middle of the cabinet contains three Inductor fuses. The upper portion of the cabinet contains two field coil driver fuses. Refer to Systems Operation, Testing and Adjusting, RENR9988, "General Information (Flywheel Cabinet)" for illustrations of the location of the left panel in the cabinet. Refer to Illustration 1 for the location of the fuses on the left panel. Refer to Illustration 2 for the location of the field coil driver fuse and the Inductor fuse in the cabinet.

Table 1
Fuse  Component 
F1  K1 contactor (Phase A) 
F2  K1 contactor (Phase B) 
F3  K1 contactor (Phase C) 
F4  K1 contactor (Phase A) 
F5  K1 contactor (Phase B) 
F6  K1 contactor (Phase C) 
F25  K1 transformer (primary input) 
F26  T1 transformer (primary COM) 
F27  T1 transformer (primary input) 
F28  T2 transformer (primary COM) 
F29  Field coil driver board DC + (J3) 
F30  Field coil driver board DC - (J4) 

Note: The Torque specification on the Line Fuse (F1 - F3) nuts is 22 N·m (16 lb ft).

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