Technical Specifications; Applicability; Inputs - GE 750 Instruction Manual

1 PRODUCT OVERVIEW

1.2 TECHNICAL SPECIFICATIONS

Systems: 3 or 4 wire, 600 kV maximum, 5000 Amp maximum
Frequency: 25 to 60 Hz nominal (frequency tracking allows operation from 16-65 Hz)
CONTROL POWER
Options: LO/HI (specified when ordering)
LO Range: DC = 20 to 60 V
AC = 20 to 48 V @ 48 to 62 Hz.
HI Range: DC = 88 to 300 V
AC = 70 to 265 V @ 48 to 62 Hz.
Power: 25 VA nominal, 35 VA maximum
Voltage Loss Hold-Up Time:30 ms
PHASE CURRENT INPUT
Source CT: 1 to 50000 A primary,
1 or 5 A secondary
Relay Input: 1 A or 5 A (specified when ordering)
Burden: Less than 0.2 VA at 1 or 5 A
Conversion Range: 0.01 to 20 x CT
(fundamental frequency only)
Accuracy: at < 2 x CT: ± 0.5% of 2 x CT
at ≥ 2 x CT: ± 1% of 20 x CT
Overload Withstand: 1 second @ 80 times rated current
continuous @ 3 times rated current
Calculated Neutral Current Errors:3 x phase inputs
GROUND CURRENT INPUT
Source CT: 1 to 50000 A primary,
1 or 5 A secondary
Relay Input: 1 A or 5 A (specified when ordering)
Burden: Less than 0.2 VA at 1 or 5 A
Conversion Range: 0.01 to 20 x CT
(fundamental frequency only)
Accuracy: at < 2 x CT: ± 0.5% of 2 x CT
at ≥ 2 x CT: ± 1% of 20 x CT
Overload Withstand: 1 second @ 80 times rated current
continuous @ 3 times rated current
SENSITIVE GROUND CURRENT INPUT
Source CT: 1 to 50000 A primary,
1 or 5 A secondary
Relay Input: 1 A or 5 A (specified when ordering)
Burden: Less than 0.2 VA at 1 or 5 A
Conversion Range: Low End:
Maximum:
(fundamental frequency only)
Accuracy: at < 0.1 x CT: ± 0.2% of 1 x CT
at ≥ 0.1 x CT: ± 1% of 1 x CT
Overload Withstand: 1 second @ 80 times rated current
continuous @ 3 times rated current
GE Power Management
Courtesy of NationalSwitchgear.com
BUS AND LINE VOLTAGE INPUTS
Source VT:
Source VT Ratio:
Relay Input:
Burden:
Max. Continuous:
Accuracy (0°-40°C):
LOGIC INPUTS

Inputs:

Dry Contacts:
Wet Contacts:
ANALOG INPUT
Current Input:
Input Impedance:
Conversion Range:
Accuracy:
TRIP AND CLOSE COIL MONITORING INPUTS
Acceptable Voltage
Trickle Current:
IRIG-B INPUT
Amplitude-Modulated: 2.5 to 6 Vp-p @ 3:1 signal ratio
DC Shift:
Input Impedance:
0.005 x CT
500 A primary
750/760 Feeder Management Relay
1.2 TECHNICAL SPECIFICATIONS
0.12 to 600 kV / 50 to 240 V
1 to 5000 in steps of 0.1
50 V to 240 V phase-neutral
Less than 0.025 VA at 120 V
or > 576 KΩ
273 V phase-neutral (Full Scale) CT
(fundamental frequency only)
± 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)
14 contact and / or virtual,
6 virtual only (Functions assigned to
logic inputs)
1000 Ω maximum ON resistance
(32 V DC @ 2 mA provided by relay)
30 to 300 V DC @ 2.0 mA
(External DC voltage only)
0-1 mA, 0-5 mA, 0-10 mA, 0-20 mA,
or 4-20 mA (programmable)
375 Ω ± 10%
0 to 21 mA
± 1% of full scale
Range: 20 to 250 V DC
2 mA to 5 mA
TTL
20 kΩ ±10%

1.2.1 APPLICABILITY

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1.2.2 INPUTS
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