| 摘要 |
The proposed device for testing elements of protective disconnection and earthing systems contains units for protecting electric circuits against short-circuit currents and overload, light indicators, a switching unit with power symmetrical thyristors, a control unit, a unit for setting the length of pulses that cause the operation of the protection system elements, a switch with a movable contact element and fixed contact elements, and additionally, capacitors in the circuits of the control electrodes of the symmetrical thyristors of the switching unit.
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