Our advanced impulse test systems are used for carrying out impulse voltage tests on HV apparatus like Power Transformers, Instrument Transformers, Switchgear, Breaker, HV Cable etc. The tests are conducted with lightning (LI), full or chopped waves, and / or switching impulses (SI) as prescribed in the relevant international standards. Haefely impulse test generators all integrate several safety systems, which ensure a safe operation for personnel and test object. With the patented Overshoot compensation circuits (blocking of resonating effects between generator and test object) the impulse overshoot can be minimised respectively suppressed. Therefore overvoltages on highly capacitive test objects are avoided.

Haefely High Voltage Test offers the SSG impulse current generator line, which covers the whole range of impulse current applications and related international standards. Current impulse test systems are usually customized systems. Our experienced engineering teams design also your impulse generator matching your specific needs.