(ZIGZAG), ZNYN, YND(OPEN), II0]
Grounding Transformers are designed for providing an artificial neutral point for ungrounded three phase power systems. During the line-to-ground faults, grounding transformers provide an easy path to ground faults to limit the fault currents and transient over voltages.
Grounding transformers normally carry short-circuit ground current until the circuit breaker clears the fault. Therefore, they have short time ratings.
The kVA rating of a earthing transformer depends on the normal line to neutral voltage and the fault current value for a specified time, such as seconds to minutes
For special tests, please contact us.