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Overcurrent and Earthfault Relay. General description. A non-directional heavily damped induction disc relay which has an adjustable inverse time/current. Technical Specifications. Model No : CDG31EG001SBCH. Relay type, CDG 31. APPLICATION, 2 O/C + 1 E/F. BURDEN / D.M.T, 3 VA / 3 SECS. Negative sequence overcurrent protection (NPS) Autoreclose inhibit following manual close ALSTOM Grid with the relay's serial number.Directional Overcurrent Logic diagram (Phase A shown only) This technical manual provides a functional and technical description of Alstom Grid's P14D, Type CDAG Combined Overcurrent and Earth Fault Relay Features l. Identical time/current characteristics on all taps for overcurrent units. General description. A non-directional heavily damped induction disc relay which has an adjustable extremely inverse time/ current characteristic. Technical Specifications. Model No : CDG31EG011SB(M). Relay type, CDG 31. APPLICATION, 2 O/C + 1 E/F. BURDEN / D.M.T, 3 VA / 1.3 SEC. Description. Alstom Over current & Earth fault Protection relay CDG31EG004SBCH. Technical Specification of Alstom Over current & Earth fault Protection Types CDG 11 and CDG 16 Inverse Time Overcurrent and Earth Fault Relay. If in doubt, please consult ALSTOM T & D 0.05-0.2 0.1-0.4 0.2-0.8 0.25-1 0.5-2