Inputs - GE C70 Instruction Manual

2 PRODUCT DESCRIPTION
REAL POWER (WATTS)
Accuracy at 0.1 to 1.5 x
CT rating and 0.8 to
±1.0% of reading at –1.0  PF< –0.8 and
1.2 x VT rating:
0.8 < PF 10
REACTIVE POWER (VARS)
Accuracy at 0.1 to 1.5 x
CT rating and 0.8 to
±1.0% of reading at –0.2  PF  0.2
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: ±1.0% of reading
CURRENT HARMONICS
Harmonics: 2nd to 25th harmonic: per phase, dis-
played as a % of f
quency phasor)
THD: per phase, displayed as a % of f
Accuracy:
HARMONICS: 1. f > 0.4pu: (0.20% + 0.035% / harmonic) of
1
reading or 0.15% of 100%, whichever is
greater
2. f < 0.4pu: as above plus %error of f
1
THD: 1. f > 0.4pu: (0.25% + 0.035% / harmonic) of
1
reading or 0.20% of 100%, whichever is
greater
2. f < 0.4pu: as above plus %error of f
1
AC CURRENT
CT rated primary: 1 to 50000 A
CT rated secondary: 1 A or 5 A by connection
Relay burden: < 0.2 VA at rated secondary
Conversion range:
0.02 to 46  CT rating RMS symmetrical
Standard CT:
Current withstand: 20 ms at 250 times rated
1 sec. at 100 times rated
continuous 4xInom; URs equipped with
24 CT inputs have a maximum operating
temp. of 50°C
Short circuit rating: 150000 RMS symmetrical amperes, 250
V maximum (primary current to external
CT)
AC VOLTAGE
VT rated secondary: 50.0 to 240.0 V
VT ratio: 1.00 to 24000.00Relay burden:< 0.25 VA
at 120 V
Conversion range: 1 to 275 V
Voltage withstand: continuous at 260 V to neutral
1 min./hr at 420 V to neutral
GE Multilin
(
fundamental fre-
1
1
1
1
C70 Capacitor Bank Protection and Control System
VOLTAGE HARMONICS
Harmonics: 2nd to 25th harmonic: per phase, dis-
played as a % of f
quency phasor)
THD: per phase, displayed as a % of f
Accuracy:
HARMONICS: 1. f > 0.4pu: (0.20% + 0.035% / harmonic) of
1
reading or 0.15% of 100%, whichever is
greater
2. f < 0.4pu: as above plus %error of f
1
THD: 1. f > 0.4pu: (0.25% + 0.035% / harmonic) of
1
reading or 0.20% of 100%, whichever is
greater
2. f < 0.4pu: as above plus %error of f
1
FREQUENCY
Accuracy at
V = 0.8 to 1.2 pu: ±0.01 Hz (when voltage signal is used
for frequency measurement)
I = 0.1 to 0.25 pu: ±0.05 Hz
I > 0.25 pu: ±0.02 Hz (when current signal is used for
frequency measurement)
FREQUENCY
Nominal frequency setting:25 to 60 Hz
Sampling frequency: 64 samples per power cycle
Tracking frequency range:20 to 70 Hz
CONTACT INPUTS
1000  maximum
Dry contacts:
Wet contacts: 300 V DC maximum
Selectable thresholds: 17 V, 33 V, 84 V, 166 V
Tolerance: ±10%
Contacts per common return: 4
Recognition time: < 1 ms
Debounce time: 0.0 to 16.0 ms in steps of 0.5
Continuous current draw:3 mA (when energized)
CONTACT INPUTS WITH AUTO-BURNISHING
1000  maximum
Dry contacts:
Wet contacts: 300 V DC maximum
Selectable thresholds: 17 V, 33 V, 84 V, 166 V
Tolerance: ±10%
Contacts per common return: 2
Recognition time: < 1 ms
Debounce time: 0.0 to 16.0 ms in steps of 0.5
Continuous current draw:3 mA (when energized)
Auto-burnish impulse current: 50 to 70 mA
Duration of auto-burnish impulse: 25 to 50 ms
2.2 SPECIFICATIONS
(
fundamental fre-
1
1
2
1
1

2.2.5 INPUTS

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