By Vladimir Gurevich

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02... 03... 05... 10... 20... 50... 025... 05... 10... 25.. 50.... 00.. 50... 25... 5... 0... 0... 05... 15. 25... 0.... 2... 2... 5... 8 Control circuit parameters for different versions: R,0hm, L, mGH 15. 1300 23... 12.. 8. 26... 8. 26... 70 Maximal dimensions, mm 026x47 56x27x70 075x150 075x190 Weight, g 45 130 370 620 The devices withstand the action of external environmental factors according to MEL-STD-202 requirements: HV RG-series Relays 17 - Operation temperatures range -55 to +85°C - Cyclical temperature change in range -55to+85°C - Air humidity 87% at a temperature of 40°C - Low air pressure with high voltage applied - 87 mmHg - Vibrations resistance lOg at an oscillation amplitude frequency in range 10-500 Hz - Repeated shock: 55 g, duration 2 ms, 10,000 impacts - Single mechanical impacts: 30 g/s, l/i sinusoid with duration 11 msec.

0... 0... 05... 15. 25... 0.... 2... 2... 5... 8 Control circuit parameters for different versions: R,0hm, L, mGH 15. 1300 23... 12.. 8. 26... 8. 26... 70 Maximal dimensions, mm 026x47 56x27x70 075x150 075x190 Weight, g 45 130 370 620 The devices withstand the action of external environmental factors according to MEL-STD-202 requirements: HV RG-series Relays 17 - Operation temperatures range -55 to +85°C - Cyclical temperature change in range -55to+85°C - Air humidity 87% at a temperature of 40°C - Low air pressure with high voltage applied - 87 mmHg - Vibrations resistance lOg at an oscillation amplitude frequency in range 10-500 Hz - Repeated shock: 55 g, duration 2 ms, 10,000 impacts - Single mechanical impacts: 30 g/s, l/i sinusoid with duration 11 msec.

Two groups can be pointed out: active and passive spark-arresting (arc - arresting). The first group contains devices having active electronic elements such as transistors and thyristors. The other group offers the contacts shunting (bypassing) with spark-arresting circuit containing a capacitor and a resistor (linear, non-linear or a combination of both). The simplest way of passive arc arresting on contacts switching a DC circuit with inductance is to bypass them with an active linear resistance R, Fig.

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