Metering - GE t60 Instruction Manual
Ur series transformer protection system
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- Instruction manual (796 pages) ,
- Communications manual (532 pages) ,
- Communications manual (526 pages)
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2 PRODUCT DESCRIPTION
RMS CURRENT: PHASE, NEUTRAL, AND GROUND
Accuracy at
0.1 to 2.0 × CT rating: ±0.25% of reading or ±0.1% of rated
(whichever is greater)
> 2.0 × CT rating:
±1.0% of reading
RMS VOLTAGE
Accuracy:
±0.5% of reading from 10 to 208 V
REAL POWER (WATTS)
Accuracy:
±1.0% of reading at
–0.8 < PF ≤ –1.0 and 0.8 < PF ≤ 1.0
REACTIVE POWER (VARS)
±1.0% of reading at –0.2 ≤ PF ≤ 0.2
Accuracy:
APPARENT POWER (VA)
Accuracy:
±1.0% of reading
WATT-HOURS (POSITIVE AND NEGATIVE)
Accuracy:
±2.0% of reading
±0 to 1 × 10
Range:
Parameters:
three-phase only
Update rate:
50 ms
VAR-HOURS (POSITIVE AND NEGATIVE)
Accuracy:
±2.0% of reading
±0 to 1 × 10
Range:
Parameters:
three-phase only
Update rate:
50 ms
AC CURRENT
CT rated primary:
1 to 50000 A
CT rated secondary:
1 A or 5 A by connection
Nominal frequency:
20 to 65 Hz
Relay burden:
< 0.2 VA at rated secondary
Conversion range:
0.02 to 46 × CT rating RMS symmetrical
Standard CT:
Sensitive Ground CT module:
0.002 to 4.6 × CT rating RMS symmetrical
Current withstand:
20 ms at 250 times rated
1 sec. at 100 times rated
continuous at 3 times rated
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 24000.00
Nominal frequency:
20 to 65 Hz
Relay 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
6
MWh
6
Mvarh
T60 Transformer Protection System
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
FREQUENCY
Accuracy at
V = 0.8 to 1.2 pu:
±0.001 Hz (when voltage signal is used
for frequency measurement)
I = 0.1 to 0.25 pu:
±0.05 Hz
I > 0.25 pu:
±0.001 Hz (when current signal is used
for frequency measurement)
DEMAND
Measurements:
Phases A, B, and C present and maxi-
mum measured currents
3-Phase Power (P, Q, and S) present
and maximum measured currents
Accuracy:
±2.0%
CONTACT INPUTS
1000 Ω 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 Ω 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
2.2.4 METERING
(
fundamental fre-
1
1
2
1
1
2.2.5 INPUTS
2-15
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