Protection Elements - GE G30 Instruction Manual

SPECIFICATIONS

2.5.1 Protection elements

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 intelligent electronic
devices (IEDs) or 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.
2
PERCENT DIFFERENTIAL
Characteristic:
Number of zones:
Minimum pickup:
Slope 1 range:
Slope 2 range:
Kneepoint 1:
Kneepoint 2:
nd
2 harmonic inhibit level:
nd
2 harmonic inhibit function:
nd
2 harmonic inhibit mode:
th
5 harmonic inhibit range:
Operate times:
Harmonic inhibits selected:
No harmonic inhibits selected:
Dropout level:
Level accuracy:
RESTRICTED GROUND FAULT
Pickup:
Dropout:
Slope:
Level accuracy:
0.1 to 2.0 x CT rating:
>2.0 x CT rating
Pickup delay:
Dropout delay:
Operate time:
PHASE/NEUTRAL/GROUND TOC
Current:
Pickup level:
Dropout level:
Level accuracy:
0.1 to 2.0 × CT:
> 2.0 × CT:
Curve shapes:
Curve multiplier:
Reset type:
Curve timing accuracy at 1.03 to 20 x pickup:
Voltage restraint:
2-20
Differential restraint pre-set
1
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
1.0 to 40.0% in steps of 0.1
Adaptive, Traditional, Disabled
Per-phase, 2-out-of-3, Average, 1-out-of-3
1.0 to 40.0% in steps of 0.1
20 to 30 ms at 60 Hz;
20 to 35 ms at 50 Hz
5 to 20 ms
97 to 98% of pickup
±0.5% of reading or ±1% of rated (whichever is greater) for two windings setup
0.005 to 30.000 pu in steps of 0.001
97 to 98% of pickup
0 to 100% in steps of 1%
±0.5% of reading or ±1% of rated (whichever is greater)
±1.5% of reading
0 to 600.00 s in steps of 0.01
0 to 600.00 s in steps of 0.01
<1 power system cycle
Phasor or RMS
0.020 to 30.000 pu in steps of 0.001
97% to 98% of pickup
±0.5% of reading or ±0.4% of rated (whichever is greater)
±1.5% of reading > 2.0 × CT rating
IEEE Moderately/Very/Extremely Inverse; IEC (and BS) A/B/C and Short Inverse; GE IAC Inverse,
2
Short/Very/ Extremely Inverse; I t; FlexCurves™ (programmable); Definite Time (0.01 s base
curve)
Time Dial = 0.00 to 600.00 in steps of 0.01
Instantaneous/Timed (per IEEE)
±3.5% of operate time or ±½ cycle (whichever is greater) from pickup to operate
Modifies pickup current for voltage in the range of 0.1 < V < 0.9 VT Nominal in a fixed linear rela-
tionship
CHAPTER 2: PRODUCT DESCRIPTION
G30 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL