GE Multilin 745 User Manual

Overview
http://www.GEindustrial.com/multilin
2–6
GE Multilin
Specifications745
Transformer Management Relay
FREQUENCY RATE OF CHANGE
Number of Elements: 4
Operating current pickup: 0.05 to 1.00 × CT
in steps of 0.01
Operating voltage pickup: 0.10 to 0.99 × VT
in steps of 0.01
Pickup level: 45.00 to 59.99 Hz in steps of
0.01
Dropout level: pickup + 0.03 Hz
Rate 1/2/3/4: 0.1 to 5.0 Hz/sec. in steps of
0.1
Dropout level: pickup + 0.07 Hz/sec.
Signal source: Winding 1 Phase A current /
voltage
Level accuracy: ±0.02 Hz
Operate time: The operate time of this
element is variable and is
dependent on the decay rate
setting and the supervision
frequency level.
OVERFREQUENCY
Operating current pickup: 0.05 to 1.00 × CT
in steps of 0.01
Operating voltage pickup: 0.10 to 0.99 × VT
in steps of 0.01
Pickup level: 50.01 to 65.00 Hz in steps of
0.01
Dropout level: pickup – 0.03 Hz
Time delay: 0.00 to 600.00 s in steps of
0.01
Signal source: Winding 1 Phase A current /
voltage
Level accuracy: ±0.02 Hz
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)
OVEREXCITATION ON V/HZ
Number of elements: 2
Operating voltage pickup: 0.10 to 0.99 × VT
in steps of 0.01
Pickup level: 1.00 to 4.00 V/Hz in steps of
0.01
Curve shapes: 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
Reset delay: 0.0 to 6000.0 s in steps of 0.1
Signal source: Voltage
Range: 10 to 65 Hz
Level accuracy: ±0.02 V/Hz
Solid state output operate time:
at 1.10 × pickup: 165 to 195 ms
Relay outputs 2 to 5 operate time:
at 1.10 × pickup: 170 to 200 ms (delay set
at 0.0 s)
OVEREXCITATION ON 5
th
HARMONIC LEVEL
Operating current pickup: 0.03 to 1.00 × CT
in steps of 0.01
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
Solid state output operate time:
at 1.10 × pickup: 20 to 120 ms
Relay outputs 2 to 5 operate time:
at 1.10 × pickup: 25 to 125 ms (delay set
at 0.0 s)
INSULATION AGING
HOTTEST SPOT LIMIT:
Pickup level: 50 to 300°C in steps of 1
Delay: 0 to 60000 min. in steps of 1
AGING FACTOR LIMIT:
Pickup level: 1.1 to 10.0 in steps of 0.1
Delay: 0 to 60000 min. in steps of 1
LOSS OF LIFE LIMIT:
Pickup level: 0 to 20000 × 10 h in steps of 1
Outputs ANALOG OUTPUTS
Number of outputs: 7
Output range: 0-1 mA, 0-5 mA, 0-10 mA, 0-
20 mA, or 4-20 mA
Maximum load: 10 kΩ at 0 to 1 mA
600 Ω at 4 to 20 mA
Isolation: Fully isolated
Accuracy: ±1% of full scale
SOLID STATE OUTPUT
Maximum ratings: make and carry 15 A at
250 V DC for 500 ms

GE Multilin 745 Specifications

General

Brand	GE
Model	Multilin 745
Category	Relays
Language	English