UPS 1000S/ UPS 1200S Uninterruptible Power Supplys Caterpillar

Illustration 1	g01275909

There are three fans that are mounted in the middle of the Static Switch cabinet.

Removal

The cables from the Static Switches at the top of the cabinet needs moved out of the way in order to remove a fan.

Note: Only the Static Switch cabling that interferes with removal of the fan to be replaced needs disconnected.

1. Perform steps in the Systems Operation, Testing and Adjusting, "Internal Component Preremoval Steps (Static Switch Cabinet)" in order to de-energize the system and gain access to internal components.

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Illustration 2	g01275927
Static Switch Output Connections (1) Bypass Static Switch Output (2) Static Switch Output Cables (3) Line Static Switch Output

2. Disconnect the five cables coming from the Bypass Static Switch output.

   Refer to Illustration 2.

3. Disconnect the five cables coming from the Line Static Switch output.

   Refer to Illustration 2.

4. Disconnect the two wire harnesses that lead into the top of the fan housing. The wire harnesses locations have labels. Verify the labeling.

5. Remove the four bolts, one at each corner of the fan housing, that hold the fan assembly in the cabinet. Use a 76 mm (3/8 inch) socket.

6. Slide the fan assembly up and out over the frame rail in the middle of the cabinet.

Installation

1. Position the fan assembly into the cabinet by sliding the assembly in over the top of the frame rail in the middle of the cabinet.

   The cables coming out of the fan assembly should be at the top, left side of the fan housing.

2. Attach the fan assembly to the cabinet with four bolts, one at each corner of the fan housing. Use a 76 mm (3/8 inch) socket.

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Illustration 3	g01275935
Static Switch Fan Assembly (4) Fan Control (Black, White, Red) (5) Bolt Location (x4) (6) Fan Power (Blue, Brown)

3. Connect the two wire harnesses to the cabinet wiring according to the labeling.

   Refer to Illustration 3.

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Illustration 4	g01275961
(7) Static Switch Current Transformers

4. Attach the five cables that run through the Current Transformer. The Current Transformer is attached to the cross-member in the middle of the cabinet. Attach the cables to the Line Static Switch output with the hardware according to the diagram in Illustration 4.

   Refer to Illustration 2.

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Illustration 5	g01275550
(10) Nut (11) Belleville Washer (12) Grade 8 Coated Steel Washer (13) Bus Bars (14) Bolt (15) Cable Lug

5. Attach the five cables that run from the bottom of the cabinet, outside of the Current Transformer, to the Bypass Static Switch output with hardware according to the diagram in Illustration 5.

   Refer to Illustration 5.

   Note: In all cases, the side of the Belleville washer that curves inward should be placed facing the bus bar.

6. Tighten the cable to Static Switch output nuts to 95 N·m (70 lb ft).

   Note: Always tighten the hex nut, not the bolt.