Inputs - GE L90 Instruction Manual
Line current differential system
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Also See for L90:
- Instruction manual (832 pages) ,
- Communications manual (532 pages) ,
- Instruction manual (700 pages)
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SPECIFICATIONS
HARMONICS:
THD:
FREQUENCY
Accuracy at
V = 0.8 to 1.2 pu:
2
I = 0.1 to 0.25 pu:
I > 0.25 pu:
DEMAND
Measurements:
Accuracy:
2.6.5 Inputs
AC CURRENT
CT rated primary:
CT rated secondary:
Relay burden:
Conversion range:
Standard CT:
Sensitive Ground CT module:
Current withstand:
Short circuit rating:
AC VOLTAGE
VT rated secondary:
VT ratio:
Relay burden:
Conversion range:
Voltage withstand:
FREQUENCY
Nominal frequency setting:
Sampling frequency:
Tracking frequency range:
CONTACT INPUTS
Dry contacts:
Wet contacts:
Selectable thresholds:
Tolerance:
Contacts per common return:
Recognition time:
Debounce time:
Continuous current draw:
CONTACT INPUTS WITH AUTO-BURNISHING
Dry contacts:
Wet contacts:
Selectable thresholds:
2-44
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
20 ms at 250 times rated
1 sec at 100 times rated
continuous 4xInom
150000 RMS symmetrical amperes, 250 V maximum (primary current to external CT)
50.0 to 240.0 V
1.00 to 24000.00
< 0.25 VA at 120 V
1 to 275 V
continuous at 260 V to neutral
1 min/hr at 420 V to neutral
25 to 60 Hz
64 samples per power cycle
45 to 65 Hz
1000 Ω maximum
300 V DC maximum
17 V, 33 V, 84 V, 166 V
±10%
4
< 1 ms
0.0 to 16.0 ms in steps of 0.5
4 mA (when energized)
1000 Ω maximum
300 V DC maximum
17 V, 33 V, 84 V, 166 V
L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
CHAPTER 2: PRODUCT DESCRIPTION
1
1
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