Specifications; Applicability; Inputs - GE TRANSFORMER MANAGEMENT RELAY 745 Instruction Manual

1.2 SPECIFICATIONS

1.2SPECIFICATIONS
1
Transformers:
CONTROL POWER
Options:
LO Range:
HI Range:
Power:
Fuse (not accessible)
Current Rating:
Type:
PHASE CURRENT INPUT
Source CT:
Relay Input:
Burden:
Conversion Range:
Accuracy:
at < 4 × CT:
at ≥ 4 × CT:
Overload Withstand:
GROUND CURRENT INPUT
Source CT:
Relay Input:
Burden:
Conversion Range:
Accuracy:
at < 4 × CT:
at ≥ 4 × CT:
Overload Withstand:
1-4
Courtesy of NationalSwitchgear.com
2 Winding or 3 Winding
LO/HI (specified when ordering)
DC = 20 to 60 V;
AC = 20 to 48 V at 48 to 62 Hz
DC = 90 to 300 V;
AC = 70 to 265 V at 48 to 62 Hz
30 VA nominal, 40 VA maximum
3.15 A
5 × 20 mm Slow-Blow Littelfuse, High
Breaking Capacity; Model # 2153.15
1 to 50000 A primary
1 or 5 A secondary
1 A or 5 A (specified when ordering)
Less than 0.2 VA at rated load per phase
0.02 to 46 × CT
± 0.25% of 4 × CT (±0.01 × CT)
± 0.5% of 46 × CT (±0.2 × CT)
1 second at 80 times rated current
2 seconds at 40 times rated current
continuous at 3 times 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 rated load
0.02 to 46 × CT
± 0.25% of 4 × CT (±0.01 × CT)
± 0.5% of 46 × CT (±0.2 × CT)
1 second at 80 times rated current
2 seconds at 40 times rated current
continuous at 3 times rated current
745 Transformer Management Relay
Frequency: 50 or 60 Hz nominal
(frequency tracking allows operation
from 2 to 65 Hz)
VOLTAGE INPUTS
Source VT: 2 to 600 kV / 60 to 120 V
Source VT Ratio: 1 to 5000 in steps of 1
Relay Input: 60 V to 120 V phase-neutral
Burden: Less than 0.025 VA at 120 V
Max. Continuous: 273 V
±1% of 2 × VT (±0.02 × VT)
Accuracy:
LOGIC INPUTS
Number of Inputs: 16
1000 Ω maximum ON resistance
Dry Contacts:
(32 V DC at 2 mA provided by 745)
Wet Contacts: 30 to 300 V DC at 1.5 mA
ANALOG INPUT
Type: DC mA
Ranges: 0 to 1 mA, 0 to 5 mA, 0 to 10 mA,
0 to 20 mA, 4 to 20 mA (programmable)
375 Ω ±10%
Input Impedance:
Conversion Range: 0 to 21 mA
Accuracy: ±1% of full scale (based on input range)
TAP POSITION
Type: resistance (ohms)
0 to 500 Ω or 0.5 to 5.0 kΩ
Range:
Bias Current: 1 mA or 10 mA (based on input range)
Accuracy: ±1% of full scale (based on input range)
RTD
Type: 3 wire
100 Ω Platinum (DIN.43760),
RTD Type
100 Ω Nickel, 120 Ω Nickel
IRIG-B INPUT
Amplitude-Modulated: 1.0 to 10 V pk-pk
DC Shift: TTL
Input Impedance 70 to 100 kΩ
1 PRODUCT OVERVIEW

1.2.1 APPLICABILITY

1.2.2 INPUTS

GE Multilin