When maintenance would be required?

The two (2) important considerable factors* (which ever reached first) for the maintenance are:

1. The number the tap-changer has been in operation.
2. The life time of the tap changer has been in service.
   *The considerable factors varied by the types, models and application of OLTCs.

Serial number, technical specification and the operating number that required for the maintenance of each transformer, specified on the information plates inside the Motor Drive Unit-Model ED and in front of the Motor Drive Unit-Model MA. The Inspection Instruction will be supplied upon your request.

Should the technical support been required, please directly contact our Sales and Services Department with the following information of the OLTC that would be necessary for the indentification of the assistance each customer may need:

1. Serial number
2. Type of OLTC
3. Operating numbers
4. First year in service and last date of maintenance (operating number or year of maintenance)
5. Problems of information that would be required