Inputs - GE G60 Instruction Manual

Generator protection system
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CHAPTER 2: PRODUCT DESCRIPTION
REACTIVE POWER (VARS)
Accuracy at 0.1 to 1.5 x CT rating and 0.8 to 1.2 x VT rating:
APPARENT POWER (VA)
Accuracy at 0.1 to 1.5 x CT rating and 0.8 to 1.2 x VT rating:
WATT-HOURS (POSITIVE AND NEGATIVE)
Accuracy:
Range:
Parameters:
Update rate:
VAR-HOURS (POSITIVE AND NEGATIVE)
Accuracy:
Range:
Parameters:
Update rate:
CURRENT HARMONICS
Harmonics:
Accuracy:
HARMONICS:
THD:
VOLTAGE HARMONICS
Harmonics:
Accuracy:
HARMONICS:
THD:
FREQUENCY
Accuracy at
V = 0.8 to 1.2 pu:
I = 0.1 to 0.25 pu:
I > 0.25 pu:
DEMAND
Measurements:
Accuracy:

2.5.5 Inputs

AC CURRENT
CT rated primary:
CT rated secondary:
Relay burden:
Conversion range:
Standard CT:
Sensitive Ground CT module:
G60 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL
±1.0% of reading at –0.2 ≤ PF ≤ 0.2
±1.0% of reading
±2.0% of reading
6
±0 to 1 × 10
MWh
three-phase only
50 ms
±2.0% of reading
6
±0 to 1 × 10
Mvarh
three-phase only
50 ms
2nd to 25th harmonic: per phase, displayed as a % of f
THD: per phase, displayed as a % of f
1. f
> 0.4pu: (0.20% + 0.035% / harmonic) of reading or 0.15% of 100%, whichever is greater
1
2. f
< 0.4pu: as above plus %error of f
1
1. f
> 0.4pu: (0.25% + 0.035% / harmonic) of reading or 0.20% of 100%, whichever is greater
1
2. f
< 0.4pu: as above plus %error of f
1
2nd to 25th harmonic: per phase, displayed as a % of f
THD: per phase, displayed as a % of f
1. f
> 0.4pu: (0.20% + 0.035% / harmonic) of reading or 0.15% of 100%, whichever is greater
1
2. f
< 0.4pu: as above plus %error of f
1
1. f
> 0.4pu: (0.25% + 0.035% / harmonic) of reading or 0.20% of 100%, whichever is greater
1
2. f
< 0.4pu: as above plus %error of f
1
±0.001 Hz (when voltage signal is used for frequency measurement)
±0.005 Hz
±0.02 Hz (when current signal is used for frequency measurement)
Phases A, B, and C present and maximum measured currents
3-Phase Power (P, Q, and S) present and maximum measured currents
±2.0%
1 to 50000 A
1 A or 5 A by connection
< 0.2 VA at rated secondary
0.02 to 46 × CT rating RMS symmetrical
0.002 to 4.6 × CT rating RMS symmetrical
(
fundamental frequency phasor)
1
1
1
1
(
fundamental frequency phasor)
1
1
1
1
SPECIFICATIONS
2
2-31

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