GE 345

CHAPTER 1: INTRODUCTION SPECIFICATIONS
345 TRANSFORMER PROTECTION SYSTEM – QUICKSTART GUIDE 11
FORM-A RELAYS
Configuration:....................................................... 2 (two) electromechanical
Contact material:................................................ silver-alloy
Operate time:........................................................ <8 ms
Continuous current:........................................... 10 A
Make and carry for 0.2s:.................................. 30 A per ANSI C37.90
Break (DC inductive, L/R=40 ms):................. 24 V / 1 A
48 V / 0.5 A
125 V / 0.3 A
250 V / 0.2 A
Break (DC resistive):............................................ 24 V / 10 A
48 V / 6 A
125 V / 0.5 A
250 V / 0.3 A
Break (AC inductive):.......................................... 720 VA @ 250 VAC Pilot duty A300
Break (AC resistive): ............................................ 277 VAC / 10 A
FORM-A VOLTAGE MONITOR
Applicable voltage:............................................. 20 to 250 VDC
Trickle current:...................................................... 1 to 2.5 mA
FORM-C RELAYS
Configuration:....................................................... 5 (five) electromechanical
Contact material:................................................ silver-alloy
Operate time:........................................................ <8 ms
Continuous current:........................................... 10 A
Make and carry for 0.2s:.................................. 30 A per ANSI C37.90
Break (DC inductive, L/R=40 ms):................. 24 V / 1 A
48 V / 0.5 A
125 V / 0.3 A
250 V / 0.2 A
Break (DC resistive):............................................ 24 V / 10 A
48 V / 6 A
125 V / 0.5 A
250 V / 0.3 A
Break (AC inductive):.......................................... 720 VA @ 250 VAC Pilot duty A300
Break (AC resistive): ............................................ 277 VAC / 10 A
TRIP SEAL-IN
Relay 1 trip seal-in:............................................. 0.00 to 9.99 s in steps of 0.01
Relay 2 trip seal-in:............................................. 0.00 to 9.99 s in steps of 0.01
Power supply
HIGH RANGE POWER SUPPLY
Nominal:.................................................................. 120 to 240 VAC
125 to 250 VDC
Range: ...................................................................... 60 to 300 VAC (50 and 60 Hz)
84 to 250 VDC
Ride-through time: ............................................. 35 ms
LOW RANGE POWER SUPPLY
Nominal:.................................................................. 24 to 48 VDC
Range: ...................................................................... 20 to 60 VDC
ALL RANGES
Voltage withstand: ............................................. 2 × highest nominal voltage for 10 ms
Power consumption: ......................................... 15 W nominal, 20 W maximum
20 VA nominal, 28 VA maximum
Fuse rating:............................................................ 5A fuse; time lag, slow blow, 350V 4.5 O.D. X 14.5mm