GE T60

2-22 T60 Transformer Protection System GE Multilin
2.3 SPECIFICATIONS 2 PRODUCT DESCRIPTION
2
NEUTRAL DIRECTIONAL OVERCURRENT
Directionality: Co-existing forward and reverse
Polarizing: Voltage, Current, Dual, Dual-V, Dual-I
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  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
Curve timing accuracy
at <0.90 x pickup: ±3.5% of operate time or ±1/2 cycle
(whichever is greater) from pickup to
operate
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
Curve timing accuracy
at <0.90 x pickup: ±3.5% of operate time or ±1/2 cycle
(whichever is greater) from pickup to
operate
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
Timer accuracy: ±3% of operate time or ±1/4 cycle
(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
Curve timing accuracy
at >1.1 x pickup: ±3.5% of operate time or ±1 cycle
(whichever is greater) from pickup to
operate
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
Timer accuracy: ±3% of operate time or ±1/4 cycle
(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
Timer accuracy: ±3% of operate time 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