Trigger Unit for the Controlled Gap

The block for triggering a controlled arrester of the RVU-43 type is described. To start, an optical pulse from the clock generator is used, which is fed through a plastic light guide to the photodetector of the trigger unit. The amplitude of the trigger voltage pulse (in the absence of a breakdown of the controlled arrester) is not less than 7 kV. The amplitude of the trigger current pulse (after the breakdown of the controlled spark gap) is not more than 5 kA. The front of the trigger voltage pulses is not more than 0.1 µs. The delay from the input clock pulse to the appearance of voltage at the output of the trigger unit is no more than 0.5 μs. The trigger unit does not require additional electrical power. Power is supplied from a capacitive storage through a high-resistance resistor. The maximum current consumption does not exceed 1 mA. The operating voltage of the capacitive storage is from 1 to 50 kV.