33kV 34.5kV 35kV 36kV ONAN Grounding Transformers

Product Introduction

Grounding Transformers are intended to establish an artificial neutral point for ungrounded three phase power systems.

The kVA rating of an earthing transformer is contingent upon the normal line-to-neutral voltage and the magnitude of fault current for a specified duration, typically ranging from seconds to minutes. In the event of line-toground faults, these transformers offer a direct path for fault currents to ground, thereby constraining fault currents and transient over-voltages.

Grounding Transformers typically handle short-circuit ground current until the circuit breaker resolves the fault. Consequently, they are equipped with short-time ratings. We have hermetic type, dry type and oil type transformers.

Product Parameters

Test List

• Visual & Dimensional Check
• Measurement of Voltage Ratio
• Measurement of Winding Resistance
• Measurement of Zero Sequence Impedance
• Measurement of No-Load Loss and Current
• Measurement of Short-Circuit Impedance and Load Loss
• Dielectric Tests
• Separate Source AC Withstand Voltage Test
• Induced AC Withstand Voltage Test
• Lightning Impulse Test
• Temperature Rise Test
• Final Check
• For special tests, please contact us.