APPENDIX – 1, SHEET 1 OF 1

HISTORY CARD FORMAT FOR MAINTENANCE OF VARIABLE SPEED DRIVE (VFD) PANELS

Make Type Sr. No. / TAG NO.

Date Issued By

Sr.No.

Component Test Result or Condition as found

Action Test Initial

1. Operational / Functional Checks for all circuits and annunciations

2. Cleanliness / Condition of Panels

3. Operational / Functional Checks for Protective Devices and Change Over Circuits

4. Insulation Resistance Test for Power and Control Circuits before and after High Voltage Test

5. High Voltage Test 6. Testing and calibration of

all the Instruments / Meters / Protective Relays / Devices forming part of the VFD Panels

7. Correctness of rating / setting range for Power / Control Circuit Fuses, Contactors, Overload relays, Outgoing Cable size, etc

8. Effectiveness and correctness of Earthing Connections

9. Checking of Cooling System & its Flow

10. Preventive Maintenance and Condition Monitoring Tests as per VFD Vendor