Keywords:
Electrical testing, Electrical insulation, Instrument transformers, Electrical measuring instruments, Rated voltage, Grades (quality), Type testing, Short-circuit currents, Ratings, Temperature-rise limit, Overvoltage tests, Partial discharges, Withstand voltage, Electrical protection equipment, Windings, Marking, Potential transformers, Power output, Test equipment, Three-phase transformers, Circuits, Accuracy, Transformers, Rated frequencies, Impulse-voltage tests