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1 PRODUCT OVERVIEW
PERCENT DIFFERENTIAL
Operating Current Pkp: 0.05 to 1.00 × CT in steps of 0.01
Dropout Level:
97 to 98% of Pickup
SLOPE-1 Range:
15% to 100% in steps of 1
SLOPE-2 Range:
50% to 100% in steps of 1
KP (Slope-1 Kneepoint): 1.0 to 20.0 × CT in steps of 0.1
Harmonic Restraint:
0.1% to 65.0% in steps of 0.1
Solid State Output Operate Time:
at Pickup < 1 × CT: 42 to 52 ms
at 1 × CT < Pickup < 1.1 × kneepoint: 34 to 44 ms
at Pickup > 1.1 × kneepoint: 26 to 36 ms
Relay Outputs 2 to 5 Operate Time:
at Pickup < 1 × CT: 46 to 56 ms
at 1 × CT < Pickup < 1.1 × kneepoint: 38 to 48 ms
at Pickup > 1.1 × kneepoint: 30 to 40 ms
INSTANTANEOUS DIFFERENTIAL OVERCURRENT
3.00 to 20.00 × CT in steps of 0.01
Pickup Level:
Dropout Level:
97 to 98% of Pickup
Level Accuracy:
Per current input
Solid State Output Operate Time:
at 1.2 × pickup:
22 to 30 ms
at 2.0 × pickup:
18 to 26 ms
at 4.0 × pickup:
11 to 19 ms
Relay Outputs 2 to 5 Operate Time:
at 1.2 × pickup:
28 to 36 ms
at 2.0 × pickup:
24 to 32 ms
at 4.0 × pickup:
17 to 25 ms
PHASE / NEUTRAL / GROUND / NEGATIVE SEQUENCE
TIME OVERCURRENT
0.05 to 20.00 × CT in steps of 0.01
Pickup Level:
Dropout Level:
97 to 98% of Pickup
Curve Shapes:
ANSI Extremely/Very/Moderately/Nor-
mally Inverse; Definite Time (0.1 s base
curve); IEC Curve A/B/C and Short;
FlexCurve™ A/B/C (programmable
curves); IAC Extreme/Very/Inverse/Short
Curve Multiplier:
0.5 to 30 for ANSI, IAC, and Flex-
Curves™ in steps of 0.1 s; 0.05 to
100.00 for IEC curves in steps of 0.01
Reset Type:
Instantaneous or Linear
Level Accuracy:
Per current input
Timing Accuracy:
±3% of trip time or ±20 ms (whichever is
greater) at ≥ 1.03 × pickup
GE Multilin
Courtesy of NationalSwitchgear.com
PHASE / NEUTRAL / GROUND / NEGATIVE SEQUENCE
INSTANTANEOUS OVERCURRENT
Pickup Level:
Dropout Level:
Time Delay:
Level Accuracy:
Solid State Output Operate Time:
at 1.2 × pickup:
at 2.0 × pickup:
at 4.0 × pickup:
Relay Outputs 2 to 5 Operate Time
at 1.2 × pickup:
at 2.0 × pickup:
at 4.0 × pickup:
RESTRICTED GROUND FAULT
Number of Elements:
Minimum Pickup:
Dropout Level:
Slope Range:
Pickup Delay:
Operating time:
UNDERFREQUENCY
Number of Elements:
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)
FREQUENCY RATE OF CHANGE
Number of Elements:
Operating Current Pkp: 0.05 to 1.00 × CT in steps of 0.01
Operating Voltage Pkp
Pickup Level:
Dropout Level:
Rate 1/2/3/4:
Dropout Level:
Signal Source:
Level Accuracy:
Operate Time:
745 Transformer Management Relay
1.2 SPECIFICATIONS
1.2.3 PROTECTION ELEMENTS
0.05 to 20.00 × CT in steps of 0.01
97 to 98% of Pickup
0 to 60000 ms in steps of 1
Per current input
22 to 30 ms
18 to 26 ms
11 to 19 ms
28 to 36 ms
24 to 32 ms
17 to 25 ms
2
0.02 to 20.00 × CT in steps of 0.01
97 to 98% of Pickup
0 to 100% in steps of 1
0.00 to 600.00 s in steps of 0.01
at 1.1 × pickup: 30 to 40 ms
at 10 × pickup: 20 to 30 ms
2
0.10 to 0.99 × VT in steps of 0.01
45.00 to 59.99 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
4
0.10 to 0.99 × VT in steps of 0.01
45.00 to 59.99 Hz in steps of 0.01
Pickup + 0.03 Hz
0.1 to 5.0 Hz/sec. in steps of 0.1
Pickup + 0.07 Hz/sec.
Winding 1 Phase A current / voltage
±0.02 Hz
The operate time of the frequency trend
element is variable and is dependent on
the decay rate setting and the supervi-
sion frequency level.
1
1-5
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