How and when do you reform or trickle charge capacitors on an ATV61 or ATV71 Drive that has been setting in storage for a long time?
All serial numbers for ATV61/71 series
Procedure for applying voltage to an Altivar after a long duration storage:
As a function of the length of storage, you must re-apply voltage progressively
to the product to re-form the capacitors. Calculate the storage time from the date code of the product and not from the date of delivery.
Up to 1 year:
Apply voltage normally
More than 1 year (performed without a motor connected and without a run command):
Use a variable AC power supply to increase the voltage in such a fashion so as to have:
- 25% of nominal voltage for 30 minutes
- 50% of nominal voltage for 30 minutes
- 75% of nominal voltage for 30 minutes
- 100% of nominal voltage for 30 minutes
Warning: This process MUST be followed and is not optional. Applying full line voltage immediately could result in serious damage to the drive, and possible personal injury (when the drive has been sitting for more than 1 year).