1-8
745 Transformer Management Relay
GE Power Management
1.2 TECHNICAL SPECIFICATIONS
1 PRODUCT OVERVIEW
1
OVERFREQUENCY (1 ELEMENT)
Operating Current Pickup:
0.05 to 1.00 in steps of 0.01
×
CT
Operating Voltage Pickup
0.10 to 0.99 in steps of 0.01
×
VT
Pickup Level:
50.01 to 65.00 in steps of 0.01 Hz
Dropout Level:
Pickup – 0.03 Hz
Time Delay:
0.00 to 600.00 s in steps of 0.01 s
Signal Source:
Winding 1 phase A current / voltage
Level Accuracy:
±0.02 Hz
Operate Time:
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)
OVEREXCITATION ON VOLTS/HERTZ (2 ELEMENTS)
Operating Voltage Pickup:
0.10 to 0.99 in steps of 0.01
×
VT
Pickup Level:
1.00 to 4.00 in steps of 0.01 V/Hz
Curve Shape:
Definite Time (0.1 sec. base curve);
IEC Curve A/B/C
Time Delay:
0.00 to 600.00 s in steps of 0.01 s
Reset Delay:
0.0 to 6000.0 s in steps of 0.1 s
Signal Source:
Voltage
Range:
10 to 65 Hz
Level Accuracy:
±
0.02 V/Hz
Operate Time:
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)
OVEREXCITATION ON 5
TH
HARMONIC LEVEL
Operating Current Pickup:
0.03 to 1.00 in steps of 0.01
×
CT
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
Operate Time:
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)
INSULATION AGING: HOTTEST-SPOT LIMIT
Pickup Level:
50 to 300 in steps of 1°C
Delay:
0 to 60000 in steps of 1 min.
INSULATION AGING: AGING FACTOR LIMIT
Pickup Level:
1.1 to 10.0 in steps of 0.1
Delay:
0 to 60000 in steps of 1 min.
INSULATION AGING: LOSS OF LIFE LIMIT
Pickup Level:
0 to 20000 in steps of 1 x 10 h
Summary of Contents for 745 TRANSFORMER MANAGEMENT RELAY
Page 30: ...2 8 745 Transformer Management Relay GE Power Management 2 3 SECURITY 2 GETTING STARTED 2 ...
Page 210: ...7 36 745 Transformer Management Relay GE Power Management 7 2 BLOCK DIAGRAMS 7 SCHEME LOGIC 7 ...
Page 322: ...9 12 745 Transformer Management Relay GE Power Management 9 3 USING 745PC 9 745 PC SOFTWARE 9 ...
Page 396: ...A 4 745 Transformer Management Relay GE Power Management A 1 FIGURES AND TABLES APPENDIXA A ...
Page 400: ...C 2 745 Transformer Management Relay GE Power Management C 1 WARRANTY INFORMATION APPENDIXC C ...
Page 406: ...vi 745 Transformer Management Relay GE Power Management ...
Page 407: ...GE Power Management 745 Transformer Management Relay NOTES ...
