We take up retrofitting jobs for all makes and designs of disconnectors and air break switches. The major components during retrofitting include:
- Male and female contacts for double break disconnectors
- End terminals for center break disconnectors
- Clamps due to a change in conductor sizes and/or wear and tear
- Change in insulators from cap and post to solid core type
- Change in insulators required due to higher Creepage
- Support structures
- Auxiliary contacts
- Motor & Gear assemblies
- Motorization of existing manual type switches
We can also provide services for any other make of disconnectors other than our own as we have our in-house design, casting, and fabrication shop where we can manufacture any part as required.
Surge arresters need 'upgrading' at various sub-stations and lines due to a change in energy handling capacity and proneness to lightning activity. The major retrofitting of surge arresters tasks include:
- Change from porcelain type to polymer type for better hydrophobic properties
- Change of 5kA arresters to 10kA arresters due to heavy switching activities
- Upgrading to a higher class of arrester for higher energy handling capacity
- Installation of surge monitors to examine the leakage current and surge frequency
- Replacement of disconnectors and surge arresters as a whole
We also provide testing facilities of surge arresters to clients who wish to check the present health of their arresters. The testing includes:
- Power frequency test
- Residual voltage test
- Impulse voltage test
- Reference voltage test
- Accelerated ageing test
