Maintenance of Electrical Circuits and Protections

Characteristic

Proper functioning of electrical protections makes for reliable operation of both electrical power sources and distribution grid. To ensure the best performance of your electrical protections, we offer their regular testing and maintenance.

Scope of protection maintenance

Adjustment of the protection operating point according to requirements of a standard, distribution grid operator or the protective equipment’s manufacturer.
Verification of the protection operating point, and checking of tripping path and alarm circuit condition by secondary injection tests.
Verification of the protection performance by primary injection tests.
Elimination of revealed defects.
Preparation of the primary and secondary injection test procedures.
Certificate on the protection test and adjustment.
Recorded measurements during the protection tests.
Preparation of a test report.

Tested protections

Voltage protections
- Overvoltage protection
- Undervoltage protection
Frequency protections
- High frequency protection
- Low frequency protection
Current protections
- Short-circuit protection
- Directional short circuit protection
- Overcurrent protection
Differential protections
Phase comparison protectionss
Distance protections
Active and reactive protections
Phase unbalance protections