Commissioning of:

1. Electrical installation and equipment up to and over 1000V

• protective grounding resistance
• insulation resistance
• lightning protective grounding resistance
• power frequency withstand tests
• contact resistance

2. Electrical installation and the equipment next to 1000 V

• loop impedance – Zs
• Earth leakage circuit breakers

3. Safety equipment: isolate bars (manipulation, measuring, for portable grounding); isolated clamps; voltage detectors; current clamps; protective gloves, protective boots and galoshes; dielectric carpets and paths.

• electric strength of insulation by AC voltage and leakage current and the threshold voltage indication

4.Power cable lines up to 20 kV

• insulation resistance
• power frequency withstand tests

5. Capacitor installation up to and over 1000V

• value of current and evenness of loading of the individual phases
• absence of body compound
• HV withstand tests

6. Voltage transformers up to 35 kV

• insulation Resistance
• power frequency withstand tests
• winding resistance
• transformer oil – breakdown voltage
• transformer ratio
• polarity check

7. Relay protection devices, electrical automation, telemechanics and secondary circuits

• insulation resistance
• check of relay protection settings (direct or alternative(start up and return) current, direct or alternative(start up and return) voltage, time delay, impedance(start up and return))
• functional test (correct, incorrect act or functioning fail of the device)
• active resistance
• circuits integrity

8. Electric motors for direct and alternative current

• insulation resistance
• HV withstand tests
• winding resistance (stators and rotors)
• current and losses of idle running motor

9. Power measurement transformers up to 400kV

• Capacitance and dissipation factor (tgδ)

10. Optic cables and fiber optic lines

• Inserted loss from splices, connectors and macro bendings in fiber optic line.
• Total loss (Optic power)
• Optical return loss
• Length of fiber optic line