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CIT-11 EARTH LEAKAGE RELAY WITH CBCT

(RESIDUAL CURRENT RELAY)

OPERATION
In an earthed neutral A.C. System the sum total of phase and neutral current is zero i.e. there is no leakage current. However, if at any place a failure of insulation takes place then part of the phase current returns via earth instead of neutral. The active and neutral currents are then no longer equal. This unbalance is detected by a core balance current transformer for onward tripping of circuit breaker.

CONSTRUCTION
This protection system basically comprises of two components :
CBCT - Core Balance Current Transformer : This is supplied in ring or rectangular shape to suite mounting on conductors/cables or busbars/circuit breaker.
RELAY - The Information from C.B.C.T. is first of all amplified by the amplifier stage from there it is evalued and only when the leakage exceeds the preset value it operates a relay.

Available off the self – Setting 2 to 12 Amps, Aux. Supply 230V, CBCT bore 90mm/140mm/200mm. Suitable for use up to 600V system. Contact 1 NO + 1 NC with flag Hand Reset.

Case – Flush 170W x 235H x 175D mm (150 x 220mm cutout)