V-BELT 5B8473 - Caterpillar

There are two sets of Current Transformers that are used in order to measure the current going to the load.The primary set of three Current Transformers surrounds each phase of the output bus bars in the top part of the cabinet. The primary Current Transformer ratio is 2000:5.The secondary set of three Current Transformers takes the output of the primary Current Transformers and further reduces the current that is fed to the External Source Sync Board in a 5:0.1 ratio. These Current Transformers are located on the fan plenum shield, above the fans in version 1 hardware and on the top component panel in version 2 hardware.Current from the secondary Current Transformers is sent as signals to the ESS on the fan plenum shield, which is used to meter the output power of the 4-Wire Transformer and send the information to the APC-2 via the Multi-Drop Network.
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4-Wire Transformer Cabinet Current Transformer Locations, Version 1 Hardware (1) Primary Current Transformers (2) Secondary Current Transformers
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4-Wire Transformer Cabinet Current Transformer Locations, Version 2 Hardware (1) Primary Current Transformers (2) Secondary Current Transformers
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Removal Groups (Primary Current Transformer)
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Phase A Primary Current Transformer Removal Parts (5) Frame (6) Red Insulating Spacer (7) Horizontal Bus Bar (8) Vertical Bus Bar (9) Transformer Output Bus (10) Red Insulating Frame Cross-BracePrimary Current Transformer Removal
The Primary Current Transformers fall in three removal groups. Refer to Illustration 3 for the group locations. Each removal group is made up of the following components: Current Transformer, Vertical Bus Bar (8), Horizontal Bus Bar (7), Red Insulating Spacer (6), Red Insulating Frame Cross-Brace (10), Transformer Output Bus (9) and Transformer Output Bus Frame. Refer to Illustration 4.The following removal steps are for the Phase A Primary Current Transformer removal. The removal of the Primary Current Transformer on the other phases is similar.
Perform steps in the Systems Operation, Testing and Adjusting, "Internal Component Preremoval Steps (4 Wire Transformer Cabinet)" in order to de-energize the system and gain access to internal components.
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Remove the four bolts (15) that hold the Vertical Bus Bar to the 4-wire transformer outputs.
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Remove the two bolts (16) that hold the Vertical Bus Bar to the Red Insulating Frame Cross-Brace.
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Remove the three (17) bolts that hold the Vertical Bus Bar to the Horizontal Bus Bar.
Move the Vertical Bus Bar downward, out of the way.
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Red Insulating Spacer Assembly
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Spacer Hardware Connections (20) Bolt (21) Split Washer (22) Washer
Remove the two bolts (20) that hold the Red Insulating Spacer to the Horizontal Bus Bar.Note: Removal of the Phase C (lower left) Primary Current Transformer requires the removal of two Red Insulating Spacers.
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Remove the two cross tip screws that hold the Current Transformer to the red corner bracket and to the Horizontal Bus Bar.
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Remove the two wires that connect to the "X1" and "X2" terminals of the Current Transformer. The wires locations are labeled. Verify the labeling. Refer to Illustration 14.
Slide the Current Transformer off the Horizontal Bus Bar to the right.Primary Current