GE TRANSFORMER MANAGEMENT RELAY 745 Instruction Manual page 14

1.2 SPECIFICATIONS
OVERFREQUENCY
1
Operating Current Pkp: 0.05 to 1.00 × CT in steps of 0.01
Operating Voltage Pkp
Pickup Level:
Dropout Level:
Time Delay:
Signal Source:
Level Accuracy:
Solid State Output Operate Time:
at 3% beyond pickup: 120 to 150 ms
Relay Outputs 2 to 5 Operate Time:
at 3% beyond pickup: 125 to 155 ms (delay set at 0.0 s)
OVEREXCITATION ON V/HZ
Number of Elements:
Operating Voltage Pkp: 0.10 to 0.99 × VT in steps of 0.01
Pickup Level:
Curve Shapes:
Time Delay:
Reset Delay:
Signal Source:
Range:
Level Accuracy:
Solid State Output Operate Time:
at 1.10 × pickup:
Relay Outputs 2 to 5 Operate Time:
at 1.10 × pickup:
1-6
Courtesy of NationalSwitchgear.com
0.10 to 0.99 × VT in steps of 0.01
50.01 to 65.00 Hz in steps of 0.01
Pickup – 0.03 Hz
0.00 to 600.00 s in steps of 0.01
Winding 1 Phase A current / voltage
±0.02 Hz
2
1.00 to 4.00 V/Hz in steps of 0.01
Definite Time (0.1 sec. base curve);
IEC Curve A/B/C
0.00 to 600.00 s in steps of 0.01
0.0 to 6000.0 s in steps of 0.1
Voltage
10 to 65 Hz
±0.02 V/Hz
165 to 195 ms
170 to 200 ms (delay set at 0.0 s)
745 Transformer Management Relay
th
OVEREXCITATION ON 5 HARMONIC LEVEL
Operating Current Pkp: 0.03 to 1.00 × CT in steps of 0.01
Pickup Level: 0.1 to 99.9 in steps of 0.1%
Dropout: 95% of pickup
Time Delay: 0 to 60000 s in steps of 1 s
Signal Source: All phase currents
Solid State Output Operate Time:
at 1.10 × pickup:
20 to 120 ms
Relay Outputs 2 to 5 Operate Time:
at 1.10 × pickup:
25 to 125 ms (delay set at 0.0 s)
INSULATION AGING
HOTTEST SPOT LIMIT:
Pickup Level: 50 to 300°C in steps of 1
Delay: 0 to 60000 min. in steps of 1
AGING FACTOR LIMIT:
Pickup Level: 1.1 to 10.0 in steps of 0.1
Delay: 0 to 60000 min. in steps of 1
LOSS OF LIFE LIMIT:
0 to 20000 × 10 h in steps of 1
Pickup Level:
1 PRODUCT OVERVIEW
GE Multilin