Metering; Inputs - GE UR Series Instruction Manual
Line differential relay
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Also See for UR Series:
- Instruction manual (652 pages) ,
- Manual (433 pages) ,
- Release notes (33 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
APPARENT POWER VA
Accuracy:
±1.0% of reading
REAL POWER WATT
Accuracy:
±1.0% of reading at
–0.8 < PF ≤ –1.0 and 0.8 < PF ≤ 1.0
REACTIVE POWER VAR
±1.0% of reading –0.2 ≤ PF ≤ 0.2
Accuracy:
WATT-HOURS (POSITIVE & NEGATIVE)
Accuracy:
±2.0% of reading
±0 to 2 × 10
Range:
Parameters:
3-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:
Standard CT Module: 0.02 to 46 × CT rating RMS symmetrical
Sensitive Ground Module:
0.002 to 4.6 × CT rating RMS symmetrical
Current Withstand:
20 ms at 250 times rated
1 sec. at 100 times rated
Cont. at 3 times rated
AC VOLTAGE
VT Rated Secondary:
50.0 to 240.0 V
VT Ratio:
0.1 to 24000.0
Nominal Frequency:
20 to 65 Hz
Relay Burden:
< 0.25 VA at 120 V
Conversion Range:
1 to 275 V
Voltage Withstand:
cont. at 260 V to neutral
1 min./hr at 420 V to neutral
GE Power Management
9
MWh
L90 Line Differential Relay
2.6 TECHNICAL SPECIFICATIONS
VAR-HOURS (POSITIVE & NEGATIVE)
Accuracy:
±2.0% of reading
±0 to 2 × 10
Range:
Parameters:
3-phase only
Update Rate:
50 ms
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%
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)
FOR L90, THE NOMINAL SYSTEM FRE-
QUENCY SHOULD BE SELECTED AS 50 HZ
OR 60 HZ ONLY.
NOTE
CONTACT INPUTS
1000 Ω maximum
Dry Contacts:
Wet Contacts:
300 V DC maximum
Selectable Thresholds:
16 V, 30 V, 80 V, 140 V
Recognition Time:
< 1 ms
Debounce Timer:
0.0 to 16.0 ms in steps of 0.5
IRIG-B INPUT
Amplitude Modulation:
1 to 10 V pk-pk
DC Shift:
TTL
Input Impedance:
22 kΩ
2.6.4 METERING
9
Mvarh
2.6.5 INPUTS
2-17
2
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