| 摘要 |
FIELD: electricity. ^ SUBSTANCE: monitoring device contains control switching contact group in switchboard actuating relays, extender of pulse length, 2 AND-NOT and AND-NOT logic elements, trigger of memorisation of event of switchboard incorrect functioning. Direct and inverted outputs of trigger of memorisation of control command through control switching contact group of relay are connected to AND-NOT logic element, so that, upon correct functioning of relay and amplifier, logical unit was at input of AND-NOT logic element not depending on trigger state. Logic zero at input of AND-NOT logic element induces switch of trigger of memorisation of event of switchboard incorrect functioning. ^ EFFECT: increasing reliability of multiposition relay switchboard operation. ^ 1 dwg |
