Electrocution voltage selectors are used for forcing measurement current in tested earth electrode system, during touch and step voltage measurements. Voltage selector and electrocution voltage meter MNR-1, which provides touch and step voltage measurements, form complete set for earth system testing.

ZNR-1 is current source of rated power 3.5 kVA, which generates alternating current up to 50 A, with arbitrary long time.
Selector is equipped with digital ammeter and voltmeter for output parameter measurements.
High value of current enables obtaining measuring voltages higher than noise voltage level and achievement of required measurement accuracy.
When measuring circuit resistance is high, one can use two additional output voltage ranges:

• 200 V AC and current up to 18 A,
• 400 V AC and current up to 9 A.

Version with output voltage 1000 V is available on special request.