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Component Definition and Maintenance
D.C. Link / Fan / Control
Components (cont.)
7000A-UM151E-EN-P - October 2018
2. Follow appropriate safety steps to isolate the equipment from medium
voltage.
3. Verify that there is no voltage present on the capacitor by using a hot
stick or any other appropriate voltage-measuring device.
4. Perform visual inspection to ensure there is no oil leak or bulge in any
of the capacitors.
5. Using a DMM measure the capacitance across each phase-to-neutral
of capacitors without removing any connections. If the difference
between the highest and the lowest readings is below 15% then all
capacitors are in good condition.
6. If the difference between the highest and the lowest readings is off by
15% or more, then you might have a bad capacitor.
7. Before disconnecting the capacitors, note the location of all the cables
and mark them accordingly.
8. Disconnect power cables/bus bars from the capacitor terminals on all
four bushings and isolate them from the capacitor. (Refer to "Filter
Capacitor Replacement" guidelines in the Classic User Manual -
Component Definition and Maintenance chapter (chapter 6) for using
proper torque when reconnecting the capacitors)
Second Method
1. Ensure there is no power to the equipment before testing the
capacitor.
To prevent electrical shock ensure the main
A T T E N T I O N
A T T E N T I O N
power has been disconnected before working on
the capacitor. Verify that all circuits are voltage
free using a hot stick or appropriate voltage-
measuring device. Failure to do so may result in
injury or death.
7000 "A" Frame
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