Tester of type TOZ and TZZ

Testers TOZ and TZZ are designed for testing the basic functionality of voltage limiting devices:
– leakage current,
– non-triggering voltage,
– triggering voltage,
– reaction time as a function of the applied voltage.
All tests are carried out in accordance with the guidelines of the relevant standards. Additionally, TZZ device allow overcurrent relays testing and complex earth fault protection devices including tripping and holding current, resistance (mΩ
range), timing characteristics of various current-time dependent functions.