Tender For Supply Of Alstom Make Protection Relays At Infopark Phase 2,Kochi,Kerala., Kochi-Kerala

Tender For Supply Of Alstom Make Protection Relays At Infopark Phase 2,Kochi,Kerala. Supply of INSTANTANEOUS EARTH FAULT RELAY, Electro-Mechanical Relay CAG 14 Type, for high impedance restricted earth fault protection of generator and transformer. Current setting 0.5 to 2A, CT secondary Current rating 5A, Frequency 50Hz, variable external stabilising resistors of 50 ohms, 25 milliseconds at 5 times the current setting. Burden 0.9VA at the current setting on the lowest tap and 1.0VA at the current setting on the highest tap. A hand reset operation indicator should be provided. Two pairs of self reset make contacts. 1D vertical draw-out case suitable for flush mounting finished twin tone and tropicalised. Suitable trip isolating switches and CT shorting switches are provided on cradle assembly/case. Case size - 1D V 10T. Cut out Dimension (in mm) (H X W X D) - 222 X 150 X 203. 3 Approved Make and Model No: ALSTOM, CAG14AF15A 2 Supply of TRIP CIRCUIT SUPERVISION RELAY, Electro-Mechanical Relay VAX 31 Type, for both pre-closing and post-closing supervision of the trip coil and trip circuit of circuit breakers. Coil-rated Voltage: 24-27V DC, Maximum loop resistance – 50 ohms for nominal alarm supply – 24 to 50 V, 0.35 to 0.8 sec. at 80% of rated volts (between failure of the trip circuit and operation of alarm contact). A hand reset operation indicator should be provided. 3 pairs of self reset contact one make and two ‘break’ as standard. Cut out Dimension (in mm) (H X W X D) - 124 X 153 X 130. 2 Approved Make and Model No: ALSTOM, VAX31ZG8071BCH Supply of TRIPPING RELAY, Electro-Mechanical Relay VAJH13 Type, for High speed tripping operation of Generators. Coil Voltage rating: 110-125V DC, High Burden, Operating Time -10 milliseconds nominal, at rated voltage. A hand reset operation indicator should be provided, and 4 pairs of contacts are needed, Flush mounting type. CASE SIZE: 1/4N V 10T, Cut out Dimension (in mm) (H X W X D) - 109 X 97 X115. 2 Approved Make and Model No: ALSTOM, VAJH13YF0751BBA

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