Protection Elements - GE t60 Instruction Manual

2.2 SPECIFICATIONS
2.2SPECIFICATIONSSPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE
The operating times below include the activation time of a trip rated Form-A output contact unless otherwise indi-
cated. FlexLogic™ operands of a given element are 4 ms faster. This should be taken into account when using
FlexLogic™ to interconnect with other protection or control elements of the relay, building FlexLogic™ equations, or
NOTE
2
interfacing with other IEDs or power system devices via communications or different output contacts.
PERCENT DIFFERENTIAL
Characteristic:
Number of zones:
Minimum pickup:
Slope 1 range:
Slope 2 range:
Kneepoint 1:
Kneepoint 2:
nd
2 harmonic inhibit level: 1.0 to 40.0% in steps of 0.1
nd
2 harmonic inhibit function: Adaptive, Traditional, Disabled
nd
2 harmonic inhibit mode: Per-phase, 2-out-of-3, Average
th
5 harmonic inhibit range: 1.0 to 40.0% in steps of 0.1
Operate times:
Harmonic inhibits selected: 20 to 30 ms
No harmonic inhibits selected: 5 to 20 ms
Dropout level:
Level accuracy:
INSTANTANEOUS DIFFERENTIAL
Pickup level:
Dropout level:
Level accuracy:
Operate time:
RESTRICTED GROUND FAULT
Pickup:
Dropout:
Slope:
Pickup delay:
Dropout delay:
Operate time:
2-6
Differential Restraint pre-set
2
0.05 to 1.00 pu in steps of 0.001
15 to 100% in steps of 1%
50 to 100% in steps of 1%
1.0 to 2.0 pu in steps of 0.0001
2.0 to 30.0 pu in steps of 0.0001
97 to 98% of pickup
±0.5% of reading or ±1% of rated
(whichever is greater)
2.00 to 30.00 pu in steps of 0.01
97 to 98% of pickup
±0.5% of reading or ±1% of rated
(whichever is greater)
< 20 ms at 3 × pickup at 60 Hz
0.000 to 30.000 pu in steps of 0.001
97 to 98% of Pickup
0 to 100% in steps of 1%
0 to 600.00 s in steps of 0.01
0 to 600.00 s in steps of 0.01
<1 power system cycle
T60 Transformer Management Relay
2 PRODUCT DESCRIPTION

2.2.1 PROTECTION ELEMENTS

PHASE/NEUTRAL/GROUND TOC
Current: Phasor or RMS
Pickup level: 0.000 to 30.000 pu in steps of 0.001
Dropout level: 97% to 98% of Pickup
Level accuracy:
for 0.1 to 2.0 × CT:
±0.5% of reading or ±1% of rated
(whichever is greater)
for > 2.0 × CT: ±1.5% of reading > 2.0 × CT rating
Curve shapes: IEEE Moderately/Very/Extremely
Inverse; IEC (and BS) A/B/C and Short
Inverse; GE IAC Inverse, Short/Very/
Extremely Inverse; I
(programmable); Definite Time (0.01 s
base curve)
Curve multiplier: Time Dial = 0.00 to 600.00 in steps of
0.01
Reset type: Instantaneous/Timed (per IEEE)
Operate at > 1.03 × actual Pickup
Timing accuracy:
±3.5% of operate time or ±½ cycle
(whichever is greater)
PHASE/NEUTRAL/GROUND IOC
Pickup level: 0.000 to 30.000 pu in steps of 0.001
Dropout level: 97 to 98% of pickup
Level accuracy:
0.1 to 2.0 × CT rating: ±0.5% of reading or ±1% of rated
(whichever is greater)
> 2.0 × CT rating
±1.5% of reading
Overreach: <2%
Pickup delay: 0.00 to 600.00 s in steps of 0.01
Reset delay: 0.00 to 600.00 s in steps of 0.01
<20 ms at 3 × Pickup at 60 Hz
Operate time:
Operate at 1.5 × Pickup
Timing accuracy:
±3% or ±4 ms (whichever is greater)
PHASE DIRECTIONAL OVERCURRENT
°
Relay connection: 90 (quadrature)
Quadrature voltage:
ABC phase seq.: phase A (V ), phase B (V
BC
ACB phase seq.: phase A (V ), phase B (V
CB
Polarizing voltage threshold: 0.000 to 3.000 pu in steps of 0.001
Current sensitivity threshold: 0.05 pu
Characteristic angle: 0 to 359
Angle accuracy: ±2°
Operation time (FlexLogic™ operands):
Tripping (reverse load, forward fault):< 12 ms, typically
Blocking (forward load, reverse fault):< 8 ms, typically
2
t; FlexCurves™
), phase C (V )
CA AB
), phase C (V )
AC BA
°
in steps of 1
GE Multilin