Provides repeatable, accurate measurement of breakdown voltage of insulating oils used in electrical equipment./ Versatile, lightweight and rugged./ Designed for both field and laboratory use./ Three rates of rise, 500V/2000V/3000V per second./ Rate of rise selector switch with Stop/Dwell positions./ Arc detection with automatic shutdown./ 'Zero Start' and test chamber interlock provision./ Window panel for test observation./ 60 kV & 100 kV test cells for ASTM & IEC standards./