Hi-Pot Foster Transformer Ltd 30 Kv AC

The Foster Transformers Ltd 30 kV AC High Voltage Test Set (Hipot) is a rugged and reliable dielectric test instrument designed to evaluate the insulation integrity of electrical apparatus. Built by a manufacturer with a long legacy in robust electrical testing equipment (now historically associated with the Megger Group), this unit is engineered to verify that insulation can safely withstand high power-frequency voltages without breaking down. It is widely used in substations, repair shops, and industrial facilities.

 

Here are the key features of the equipment:

  • Primary Application: Specifically designed for AC withstand (hipot) testing on medium-voltage equipment, including switchgear, circuit breakers, vacuum bottles, cables, motors, and insulators.

     

  • Variable Output: Provides a continuously variable AC test voltage from 0 up to 30 kV to meet various testing standards.

  • Accurate Metering: Features multi-range kilovolt (kV) and milliampere (mA) meters to precisely monitor both the applied output voltage and the leakage current.

  • Operator Safety: Typically equipped with essential safety mechanisms, including a zero-start interlock (requiring the voltage dial to be at zero before powering on) and external safety interlock provisions.

     

  • Overload Protection: Includes a fast-acting overload circuit breaker and adjustable overcurrent trip settings that immediately shut off power in the event of an insulation flashover or breakdown.

  • Durable Build: Housed in a heavy-duty, portable enclosure built to withstand the rigors of harsh field environments and routine factory use.

Description

The Foster Transformer Ltd 30 kV AC Hi-Pot set is a high-voltage AC dielectric test instrument manufactured by Foster in the UK, used for 30 kV AC withstand testing of transformer bushings, cables, and switchgear insulation. It provides a stabilised 50 Hz AC output at up to 30 kV for power frequency overvoltage tests. The unit is used in UK and international HV plant commissioning and maintenance programs.

Brand

Foster

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