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2.2 SPECIFICATIONS
2.2SPECIFICATIONS
APPLICABILITY
Systems:
Frequency:
2
CONTROL POWER
Options:
LO range:
HI range:
Power:
Voltage loss hold-up time: 30 ms
PHASE CURRENT
Source CT:
Relay input:
Burden:
Conversion range:
Accuracy:
Overload withstand:
Calculated neutral current errors: 3 × phase inputs
GROUND CURRENT
Source CT:
Relay input:
Burden:
Conversion range:
Accuracy:
Overload withstand:
SENSITIVE GROUND CURRENT
Source CT:
Relay input:
Burden:
Conversion range:
Accuracy:
Overload withstand:
2-6
Courtesy of NationalSwitchgear.com
3 or 4 wire, 600 kV maximum
5000 A maximum
25 to 60 Hz nominal (frequency tracking
allows operation from 16 to 65 Hz)
LO/HI (specified when ordering)
DC = 20 to 60 V
AC = 20 to 48 V at 48 to 62 Hz.
DC = 88 to 300 V
AC = 70 to 265 V at 48 to 62 Hz.
25 VA nominal, 35 VA maximum
1 to 50000 A primary,
1 or 5 A secondary
1 A or 5 A (specified when ordering)
Less than 0.2 VA at 1 or 5 A
0.01 to 20 × CT
(fundamental frequency only)
at < 2 × CT: ±0.5% of 2 × CT
≥
at
2 × CT: ±1% of 20 × CT
1 second at 80 × rated current
continuous at 3 × rated current
1 to 50000 A primary,
1 or 5 A secondary
1 A or 5 A (specified when ordering)
Less than 0.2 VA at 1 or 5 A
0.01 to 20 × CT
(fundamental frequency only)
at < 2 × CT: ±0.5% of 2 × CT
≥
2 × CT: ±1% of 20 × CT
at
1 second at 80 × rated current
continuous at 3 × rated current
1 to 50000 A primary,
1 or 5 A secondary
1 A or 5 A (specified when ordering)
Less than 0.2 VA at 1 or 5 A
Low end: 0.005 × CT
Maximum: 500 A primary
(fundamental frequency only)
at < 0.1 × CT: ±0.2% of 1 × CT
at ≥ 0.1 × CT: ±1% of 1 × CT
1 second at 80 × rated current
continuous at 3 × rated current
750/760 Feeder Management Relay
BUS AND LINE VOLTAGE
Source VT:
0.12 to 600 kV / 50 to 240 V
Source VT ratio:
1 to 5000 in steps of 0.1
Relay input:
50 to 240 V phase-neutral
Burden:
Less than 0.025 VA at 120 V
or > 576 KW
Maximum continuous:
273 V phase-neutral (full-scale) CT
(fundamental frequency only)
Accuracy (0 to 40°C):
±0.25% of full scale (10 to 130 V);
±0.8% of full scale (130 to 273 V)
(For open delta, the calculated phase
has errors 2 times those shown above)
LOGIC INPUTS
Inputs:
14 contact and / or virtual inputs,
6 virtual only (functions assigned to logic
inputs)
Dry contacts:
1000 Ω maximum ON resistance
(32 V DC at 2 mA provided by relay)
Wet contacts:
30 to 300 V DC at 2.0 mA
(External DC voltage only)
ANALOG INPUTS
Current Input:
0 to 1 mA, 0 to 5 mA, 0 to 10 mA, 0 to 20
mA, or 4 to 20 mA (programmable)
Input Impedance:
375 Ω ± 10%
Conversion Range:
0 to 21 mA
Accuracy:
±1% of full scale
TRIP AND CLOSE COIL MONITORING
Acceptable voltage range: 20 to 250 V DC
Trickle current:
2 to 5 mA
IRIG-B
Amplitude modulated:
2.5 to 6 Vpk-pk at 3:1 signal ratio
DC shift:
TTL
Input impedance:
20 kΩ ±10%
Error:
±1.0 ms
2 INTRODUCTION
2.2.1 APPLICABILITY
2.2.2 INPUTS
GE Multilin
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