Specifications; Protection Elements - GE T60 Instruction Manual

2.3 SPECIFICATIONS

2.3SPECIFICATIONSSPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE
The operating times include the activation time of a trip rated form-A output contact unless otherwise indicated.
FlexLogic operands of a given element are 4 ms faster. Take this into account when using FlexLogic to interconnect
with other protection or control elements of the relay, building FlexLogic equations, or interfacing with other IEDs or
NOTE
2
power system devices via communications or different output contacts. If not specified, the operate times given
here are for a 60 Hz system at nominal system frequency. Operate times for a 50 Hz system are 1.2 times longer.
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 at 60 Hz;
No harmonic inhibits selected: 5 to 20 ms
Dropout level:
Level accuracy:
INSTANTANEOUS DIFFERENTIAL
Pickup level:
Dropout level:
Level accuracy:
Operate time:
2-20
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
20 to 35 ms at 50 Hz
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
T60 Transformer Protection System
2 PRODUCT DESCRIPTION

2.3.1 PROTECTION ELEMENTS

PHASE DISTANCE
Characteristic: mho (memory polarized or offset) or
quad (memory polarized or non-direc-
tional), selectable individually per zone
Number of zones: 5
Directionality: forward, reverse, or non-directional per
zone
Reach (secondary ): 0.02 to 500.00  in steps of 0.01
Reach accuracy: ±5% including the effect of CVT tran-
sients up to an SIR of 30
Distance:
Characteristic angle: 30 to 90° in steps of 1
Comparator limit angle: 30 to 90° in steps of 1
Directional supervision:
Characteristic angle: 30 to 90° in steps of 1
Limit angle: 30 to 90° in steps of 1
Right blinder (Quad only):
0.02 to 500  in steps of 0.01
Reach:
Characteristic angle: 60 to 90° in steps of 1
Left Blinder (Quad only):
0.02 to 500  in steps of 0.01
Reach:
Characteristic angle: 60 to 90° in steps of 1
Time delay: 0.000 to 65.535 s in steps of 0.001
Timer accuracy: ±3% of operate time or ±1/4 cycle
(whichever is greater)
Current supervision:
Level: line-to-line current
Pickup: 0.050 to 30.000 pu in steps of 0.001
Dropout: 97 to 98%
Memory duration: 5 to 25 cycles in steps of 1
VT location: all delta-wye and wye-delta transformers
CT location: all delta-wye and wye-delta transformers
Voltage supervision pickup (series compensation applications):
0 to 5.000 pu in steps of 0.001
Operation time: 1 to 1.5 cycles (typical)
Reset time: 1 power cycle (typical)
GE Multilin