GE Multilin T60 Transformer Protection System 2-27
2 PRODUCT DESCRIPTION 2.3 SPECIFICATIONS
2
2.3.5 INPUTS
AC CURRENT
CT rated primary: 1 to 50000 A
CT rated secondary: 1 A or 5 A by connection
Relay burden: < 0.2 VA at rated secondary
Conversion range:
Standard CT: 0.02 to 46 CT rating RMS symmetrical
Sensitive Ground CT module:
0.002 to 4.6 CT rating RMS symmetrical
Current withstand: 20 ms at 250 times rated
1 sec at 100 times rated
continuous 4xInom
URs equipped with 24 CT inputs have a
maximum operating temperature of 50°C
Short circuit rating: 150000 RMS symmetrical amperes, 250
V maximum (primary current to external
CT)
AC VOLTAGE
VT rated secondary: 50.0 to 240.0 V
VT ratio: 1.00 to 24000.00
Relay burden: < 0.25 VA at 120 V
Conversion range: 1 to 275 V
Voltage withstand: continuous at 260 V to neutral
1 min/hr at 420 V to neutral
FREQUENCY
Nominal frequency setting:25 to 60 Hz
Sampling frequency: 64 samples per power cycle
Tracking frequency range:20 to 70 Hz
CONTACT INPUTS
Dry contacts: 1000 maximum
Wet contacts: 300 V DC maximum
Selectable thresholds: 17 V, 33 V, 84 V, 166 V
Tolerance: ±10%
Contacts per common return: 4
Recognition time: < 1 ms
Debounce time: 0.0 to 16.0 ms in steps of 0.5
Continuous current draw:4 mA (when energized)
CONTACT INPUTS WITH AUTO-BURNISHING
Dry contacts: 1000 maximum
Wet contacts: 300 V DC maximum
Selectable thresholds: 17 V, 33 V, 84 V, 166 V
Tolerance: ±10%
Contacts per common return: 2
Recognition time: < 1 ms
Debounce time: 0.0 to 16.0 ms in steps of 0.5
Continuous current draw:4 mA (when energized)
Auto-burnish impulse current: 50 to 70 mA
Duration of auto-burnish impulse: 25 to 50 ms
DCMA INPUTS
Current input (mA DC): 0 to –1, 0 to +1, –1 to +1, 0 to 5, 0 to 10,
0 to 20, 4 to 20 (programmable)
Input impedance: 379 ±10%
Conversion range: –1 to + 20 mA DC
Accuracy: ±0.2% of full scale
Type: Passive
RTD INPUTS
Types (3-wire): 100 Platinum, 100 & 120 Nickel, 10
Copper
Sensing current: 5 mA
Range: –50 to +250°C
Accuracy: ±2°C
Isolation: 36 V pk-pk
REMOTE RTD INPUTS
Wire type: three-wire
Sensor type: 100 Ω platinum (DIN 43760), 100 Ω
nickel, 120 Ω nickel, 10 Ω copper
RTD sensing current: 3 mA
Range: –40 to 200°C
Accuracy: ±2°C
Lead resistance: 25 Ω maximum for Pt and Ni type; 3 Ω
max. for Cu type
Isolation: 36 Vpk
IRIG-B INPUT
Amplitude modulation: 1 to 10 V pk-pk
DC shift: TTL–Compatible
Input impedance: 50 k
Isolation: 2 kV
REMOTE INPUTS (IEC 61850 GSSE/GOOSE)
Input points: 32, configured from 64 incoming bit pairs
Remote devices: 16
Default states on loss of comms.: On, Off, Latest/Off, Latest/On
Remote DPS inputs: 5
DIRECT INPUTS
Input points: 32
Remote devices: 16
Default states on loss of comms.: On, Off, Latest/Off, Latest/On
Ring configuration: Yes, No
Data rate: 64 or 128 kbps
CRC: 32-bit
CRC alarm:
Responding to: Rate of messages failing the CRC
Monitoring message count: 10 to 10000 in steps of 1
Alarm threshold: 1 to 1000 in steps of 1
Unreturned message alarm:
Responding to: Rate of unreturned messages in the ring
configuration
Monitoring message count: 10 to 10000 in steps of 1
Alarm threshold: 1 to 1000 in steps of 1
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