Current transformers (CT)
- Ratio, burden and polarity
- Phase and magnitude error
- Excitation curve
- Winding resistance
- Secondary burden
- Dielectric withstand voltage
(2 kV AC)
- CT circuit continuity
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Voltage transformers (VT)
- Ratio, burden and polarity
- Phase and magnitude error
- Excitation curve
- Winding resistance
- Secondary burden
- Dielectric withstand voltage
(2 kV AC)
- VT circuit continuity
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Transformers
- Ratio
- Winding resistance
- Tap changer test
- Excitation current
- Short circuit impedance
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Lines and cables
- Impedance (k-factor)
- Transformer coupling
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Grounding systems
- Ground impedance
- Step and touch voltages
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Circuit breakers
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