GE UR T60 - Page 46

2-12 T60 Transformer Protection System GE Multilin
2.2 SPECIFICATIONS 2 PRODUCT DESCRIPTION
2
NEUTRAL DIRECTIONAL OVERCURRENT
Directionality: Co-existing forward and reverse
Polarizing: Voltage, Current, Dual
Polarizing voltage: V_0 or VX
Polarizing current: IG
Operating current: I_0
Level sensing: 3 × (|I_0| – K × |I_1|), IG
Independent for forward and reverse
Restraint, K: 0.000 to 0.500 in steps of 0.001
Characteristic angle: –90 to 90° in steps of 1
Limit angle: 40 to 90° in steps of 1, independent for
forward and reverse
Angle accuracy: ±2°
Offset impedance: 0.00 to 250.00 Ω in steps of 0.01
Pickup level: 0.002 to 30.000 pu in steps of 0.01
Dropout level: 97 to 98%
Operation time: < 16 ms at 3 × pickup at 60 Hz
PHASE UNDERVOLTAGE
Pickup level: 0.000 to 3.000 pu in steps of 0.001
Dropout level: 102 to 103% of pickup
Level accuracy: ±0.5% of reading from 10 to 208 V
Curve shapes: GE IAV Inverse;
Definite Time (0.1s base curve)
Curve multiplier: Time dial = 0.00 to 600.00 in steps of
0.01
Timing accuracy: Operate at < 0.90 × pickup
±3.5% of operate time or ±4 ms (which-
ever is greater)
AUXILIARY UNDERVOLTAGE
Pickup level: 0.000 to 3.000 pu in steps of 0.001
Dropout level: 102 to 103% of pickup
Level accuracy: ±0.5% of reading from 10 to 208 V
Curve shapes: GE IAV Inverse, Definite Time
Curve multiplier: Time Dial = 0 to 600.00 in steps of 0.01
Timing accuracy: ±3% of operate time or ±4 ms
(whichever is greater)
PHASE OVERVOLTAGE
Voltage: Phasor only
Pickup level: 0.000 to 3.000 pu in steps of 0.001
Dropout level: 97 to 98% of pickup
Level accuracy: ±0.5% of reading from 10 to 208 V
Pickup delay: 0.00 to 600.00 in steps of 0.01 s
Operate time: < 30 ms at 1.10 × pickup at 60 Hz
Timing accuracy: ±3% or ±4 ms (whichever is greater)
NEUTRAL OVERVOLTAGE
Pickup level: 0.000 to 3.000 pu in steps of 0.001
Dropout level: 97 to 98% of pickup
Level accuracy: ±0.5% of reading from 10 to 208 V
Pickup delay: 0.00 to 600.00 s in steps of 0.01 (definite
time) or user-defined curve
Reset delay: 0.00 to 600.00 s in steps of 0.01
Timing accuracy: ±3% or ±20 ms (whichever is greater)
Operate time: < 30 ms at 1.10 × pickup at 60 Hz
AUXILIARY OVERVOLTAGE
Pickup level: 0.000 to 3.000 pu in steps of 0.001
Dropout level: 97 to 98% of pickup
Level accuracy: ±0.5% of reading from 10 to 208 V
Pickup delay: 0 to 600.00 s in steps of 0.01
Reset delay: 0 to 600.00 s in steps of 0.01
Timing accuracy: ±3% of operate time or ±4 ms
(whichever is greater)
Operate time: < 30 ms at 1.10 × pickup at 60 Hz
VOLTS PER HERTZ
Voltage: Phasor only
Pickup level: 0.80 to 4.00 in steps of 0.01 pu V/Hz
Dropout level: 97 to 98% of pickup
Level accuracy: ±0.02 pu
Timing curves: Definite Time; Inverse A, B, and C,
FlexCurves™ A, B, C, and D
TD Multiplier: 0.05 to 600.00 s in steps of 0.01
Reset delay: 0.0 to 1000.0 s in steps of 0.1
Timing accuracy: ±3% or ±15 cycles (whichever is greater)
for values greater than 1.1 × pickup
TRANSFORMER HOTTEST-SPOT TEMPERATURE
Operating quantity: computed temperature in °C
Pickup level: 50 to 300°C in steps of 1
Dropout level: 1°C below pickup
Pickup delay: 0 to 30000 min. in steps of 1
TRANSFORMER AGING FACTOR
Operating quantity: computed aging acceleration factor (pu)
Pickup level: 1 to 10 pu in steps of 0.1
Pickup delay: 0 to 30000 min. in steps of 1
TRANSFORMER LOSS OF LIFE
Operating quantity: computed accumulated transformer loss
of life, in hours
Pickup level: 0 to 500000 hours in steps of 1
UNDERFREQUENCY
Minimum signal: 0.10 to 1.25 pu in steps of 0.01
Pickup level: 20.00 to 65.00 Hz in steps of 0.01
Dropout level: pickup + 0.03 Hz
Level accuracy: ±0.001 Hz
Time delay: 0 to 65.535 s in steps of 0.001
Timer accuracy: ±3% or 4 ms, whichever is greater
Operate time: typically 4 cycles at 0.1 Hz/s change
typically 3.5 cycles at 0.3 Hz/s change
typically 3 cycles at 0.5 Hz/s change
Typical times are average operate times including variables such
as frequency change instance, test method, etc., and may vary by
±0.5 cycles.
OVERFREQUENCY
Pickup level: 20.00 to 65.00 Hz in steps of 0.01
Dropout level: pickup – 0.03 Hz
Level accuracy: ±0.001 Hz
Time delay: 0 to 65.535 s in steps of 0.001
Timer accuracy: ±3% or 4 ms, whichever is greater
Operate time: typically 4 cycles at 0.1 Hz/s change
typically 3.5 cycles at 0.3 Hz/s change
typically 3 cycles at 0.5 Hz/s change