GE 745 TRANSFORMER MANAGEMENT RELAY Instruction Manual page 20

1.2 TECHNICAL SPECIFICATIONS
OVERFREQUENCY (1 ELEMENT)
Operating Current Pickup:
1
Operating Voltage Pickup
Pickup Level:
Dropout Level:
Time Delay:
Signal Source:
Level Accuracy:
Operate Time:
OVEREXCITATION ON VOLTS/HERTZ (2 ELEMENTS)
Operating Voltage Pickup:
Pickup Level:
Curve Shape:
Time Delay:
Reset Delay:
Signal Source:
Range:
Level Accuracy:
Operate Time:
OVEREXCITATION ON 5
Operating Current Pickup:
Pickup Level:
Dropout:
Time Delay:
Signal Source:
Operate Time:
INSULATION AGING: HOTTEST-SPOT LIMIT
Pickup Level:
Delay:
INSULATION AGING: AGING FACTOR LIMIT
Pickup Level:
Delay:
INSULATION AGING: LOSS OF LIFE LIMIT
Pickup Level:
1-8
0.05 to 1.00 in steps of 0.01 × CT
0.10 to 0.99 in steps of 0.01 × VT
50.01 to 65.00 in steps of 0.01 Hz
Pickup – 0.03 Hz
0.00 to 600.00 s in steps of 0.01 s
Winding 1 phase A current / voltage
±0.02 Hz
Solid State Output: at 3% beyond pickup: 120 to 150 ms
Relay Outputs 2-5: at 3% beyond pickup: 125 to 155 ms (delay set to 0.0 s)
0.10 to 0.99 in steps of 0.01 × VT
1.00 to 4.00 in steps of 0.01 V/Hz
Definite Time (0.1 sec. base curve);
IEC Curve A/B/C
0.00 to 600.00 s in steps of 0.01 s
0.0 to 6000.0 s in steps of 0.1 s
Voltage
10 to 65 Hz
±0.02 V/Hz
Solid State Output: at 1.10 × pickup: 165 to 195 ms
Relay Outputs 2-5: at 1.10 × pickup: 170 to 200 ms (delay set to 0.0 s)
TH
HARMONIC LEVEL
0.03 to 1.00 in steps of 0.01 × CT
0.1 to 99.9 in steps of 0.1%
95% of pickup
0 to 60000 s in steps of 1 s
All phase currents
Solid State Output: at 1.10 × pickup: 20 to 120 ms
Relay Outputs 2-5: at 1.10 × pickup: 25 to 125 ms (delay set at 0.0 s)
50 to 300 in steps of 1°C
0 to 60000 in steps of 1 min.
1.1 to 10.0 in steps of 0.1
0 to 60000 in steps of 1 min.
0 to 20000 in steps of 1 x 10 h
745 Transformer Management Relay
1 PRODUCT OVERVIEW
GE Power Management