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High Voltage Insulation / Continuity / Earth

A family of advanced, field proven instruments for high voltage insulation testing, low ohm resistance measurements and verification of protective earthing of power systems.
  • Latest advancements in development of high voltage insulation materials lead to use of modern testing principles.
  • Technical demands require high performance measuring instruments capable of measuring polarization index (PI), dielectric absorption ratio (DAR), dielectric discharge (DD), time programmable step voltage test, insulation system's capacitance, etc.
  • Traditional, analogue measuring instruments still have their place for less demanding applications.
  • Ease of use, low EMI susceptibility, automatic discharge of a load after completed measurement are just some of the many outstanding features that distinguish Metrel HV testers from other similar products on the market.

Earth testers

Measuring system for testing and verification of protective earthing, step voltage and contact voltage and measurement of specific earth resistance of power stations, substation, distribution towers and other power systems.

Continuity testers

The continuity testers from Metrel are portable, low resistance ohmmeters based on four wires Kelvin method used to measure low contact resistances of breakers and switches, busbars joints, motor & generator windings, power transformers and others where measurements are performed with a test current from 1 mA to 100 A.

HV insulation testers

Metrel’s HV insulation testers are portable instruments intended to measure the insulation resistance by using high DC test voltages up to 10kV. Insulation resistance and other insulation parameters are tested with various methods in the range up to 10TΩ.