Specifications; Protection Elements - GE T35 Instruction Manual

2 PRODUCT DESCRIPTION
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
NOTE
FlexLogic™ to interconnect with other protection or control elements of the relay, building FlexLogic™ equations, or
interfacing with other IEDs or power system devices via communications or different output contacts.
PERCENT DIFFERENTIAL
Characteristic: Differential Restraint pre-set
Number of zones: 2
Minimum pickup: 0.05 to 1.00 pu in steps of 0.001
Slope 1 range: 15 to 100% in steps of 1%
Slope 2 range: 50 to 100% in steps of 1%
Kneepoint 1: 1.0 to 2.0 pu in steps of 0.0001
Kneepoint 2: 2.0 to 30.0 pu in steps of 0.0001
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;
20 to 35 ms at 50 Hz
No harmonic inhibits selected: 5 to 20 ms
Dropout level: 97 to 98% of pickup
Level accuracy: ±0.5% of reading or ±1% of rated
(whichever is greater)
INSTANTANEOUS DIFFERENTIAL
Pickup level: 2.00 to 30.00 pu in steps of 0.01
Dropout level: 97 to 98% of pickup
Level accuracy: ±0.5% of reading or ±1% of rated
(whichever is greater)
 20 ms at 3  pickup at 60 Hz
Operate time:
PHASE/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 ±0.4% 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)
GE Multilin
BREAKER ARCING CURRENT
Principle:
Initiation:
Compensation for auxiliary relays: 0 to 65.535 s in steps of 0.001
Alarm threshold:
Fault duration accuracy: 0.25 of a power cycle
Availability:
THERMAL OVERLOAD PROTECTION
Thermal overload curves: IEC 255-8 curve
Base current:
Overload (k) factor:
Trip time constant:
Reset time constant:
Minimum reset time:
Timing accuracy (cold curve): ±100 ms or 2%, whichever is
Timing accuracy (hot curve): ±500 ms or 2%, whichever is greater
TRIP BUS (TRIP WITHOUT FLEXLOGIC™)
Number of elements:
Number of inputs:
Operate time:
Time accuracy:
2
t; FlexCurves™
T35 Transformer Protection System

2.2 SPECIFICATIONS

2.2.1 PROTECTION ELEMENTS

2
accumulates breaker duty (I t) and mea-
sures fault duration
programmable per phase from any Flex-
Logic™ operand
0 to 50000 kA2-cycle in steps of 1
1 per CT bank with a minimum of 2
0.20 to 3.00 pu in steps of 0.01
1.00 to 1.20 pu in steps of 0.05
0 to 1000 min. in steps of 1
0 to 1000 min. in steps of 1
0 to 1000 min. in steps of 1
greater
for I < 0.9 × k × I and I / (k × I ) > 1.1
p b b
6
16
<2 ms at 60 Hz
±3% or 10 ms, whichever is greater
2
2-9