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their origin to the manual practices involved in determining settings for relays. There are a number of characteristics in common use,.Type CDG 61 relay is a triple pole version of type CDG 21 relay. Technical data. Current ratings. 1A or 5A. IDMT settings. A non-directional heavily damped induction disc relay, which has an adjustable inverse time/current characteristic with a definite minimum time. CDG 21and. Type CDG 61 relay is a triple pole version of type CDG 21 relay. 4 e.g. SIL 3 Manual or automatic start 0225592 BG 5924 IP 5924 Product Description. The relay gives selective phase and earth fault overcurrent protection in time graded systems to transformers, ac machines and feeders, etc., and ensures that a System Controls And Switchgears - Offering Alstom CDG61 Earth Fault Protection Relay, For Industrial at Rs 34744 in New Delhi, Delhi. Read about company. IDMT Overcurrent and Earthfault Relay with high-set instantaneous unit. Features ensures good contact pressure base of the graduated time. even at currents near ALSTOM IDMT Overcurrent and E_F Cdg61 - Free download as PDF File (.pdf), Type CDG. 21/. 61. IDMT Overcurrent and Earth Fault Relay with H.