Rockwell Automation Publication 6000-TG100A-EN-P - September 2020 53
Chapter 5
Isolation Transformer Cabinet
Inspect Isolation
Transformer
1. Verify that the fan is rotating in the proper direction.
2. Verify the incoming and outgoing power cable connections are torqued
to specifications. See Torque Requirements on page 16
.
3. Check the cabinet interior and Isolation Transformer windings and
remove any foreign material. Vacuum dust or debris from the Isolation
Transformer cabinet.
4. Check for any physical evidence of damage or degradation of
components.
Inspect/Replace Voltage
Sensing Board
Replace a voltage sensing board with kit part number PN-569153.
The VSB cable connections and wire connectors must be firmly fastened and
show no signs of damage or accumulation of dirt, dust, or debris.
Replace Voltage Sensing Board (A-Frame)
1. Open the front door of the Junction cabinet.
Topic Page
Inspect Isolation Transformer 53
Inspect/Replace Voltage Sensing Board 53
Inspect/Replace HECS 55
ATTENTION: Wait at least 15 minutes for the stored energy to discharge fully
before performing maintenance on the Isolation Transformer cabinet.
Failure to do so may result in severe burns, injury, or death.
ATTENTION: To prevent electrical shock, disconnect the main power before
working on the Voltage Sensing Board. Verify that all circuits are voltage-
free, using a hot stick or appropriate high voltage-measuring device. Failure
to do so may result in injury or death.
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