Tests of grounding systems

Electrocution voltage selector ZNR-2


ZNR-2 is current source of rated power 7.5 kVA, which generates alternating current up to 60 A, with arbitrary long time.
Selector is equipped with digital ammeter and voltmeter for output values measurements.
High value of current enables obtaining measuring voltages higher than noise voltage level and achieving of required measurement accuracy.
Two ranges of output voltage and changeable polarity considerable extend its usability. Modular-designed device is placed on hand truck, which enables easy transportation and movement.


Electrocution voltage selectors are used for forcing measurement current in tested earth electrode system, during touch and step voltage measurements, on soils with decreased conductivity (rocks, sands). Voltage selector and electrocution voltage meter MNR-1, which provides touch and step voltage measurements, form complete set for earth system testing.


Output power
7,5 kVA
Output voltage
150, 300 V AC
Current regulation
smooth up to 60 A AC
Operation temperature -5 ºC ÷ +40 ºC
Power supply
230 V or 400 V, 50 Hz
Dimensions 465 x 660 x 880 mm
Weight about 75 kg


All questions should be directed to:

  • Zygmunt Pilny MSc Eng., , phone number: +48 32 237 66 70.