GE 15LSWGR901, Руководство по эксплуатации и техническому обслуживанию, Страница: 14 / 188

350
Feeder Protection System
279
Distribution F
eeder Pr
ot
ection
Technical Specifications
PHASE/NEUTRAL/GROUND TIME OVERCURRENT
(51P/51N/51G)
Pickup Level: 0.05 to 20.00 x CT in steps of 0.01 x CT
Dropout Level: 97 to 99% of Pickup @ I > 1 x CT
Pickup - 0.02 x CT @ I < 1 x CT
Curve Shape: ANSI Extremely/Very/Moderately/
Normally Inverse
Definite Time (0.05 s base curve)
IEC Curve A/B/C/Short
IAC Extreme/Very/Inverse/Short
User Curve, FlexCurve™ A/B
(programmable curves)
Curve Multiplier: 0.05 to 20.00 in steps of 0.01
Reset Time: Instantaneous, Linear
Time Delay
Accuracy:
±3% of expected inverse time or 1
cycle, whichever is greater
Level Accuracy: per CT input
SENSITIVE GROUND TIME OVERCURRENT (51SG)
Pickup Level: 0.005 to 3 x CT in steps of 0.001 x CT
Dropout Level: 97 to 99% of Pickup @ I > 0.1 x CT
Pickup - 0.002 x CT @ I < 0.1 x CT
Curve Shape: ANSI Extremely/Very/Moderately/
Normally Inverse
DefiniteTime
IEC Curve A/B/C/Short Inverse
IAC Extreme/Very/Inverse/Short
Inverse
User Curve, FlexCurve™ A/B
Curve Multiplier: 0.05 to 20.00 in steps of 0.01
Reset Time: Instantaneous, Linear
Time Delay
Accuracy:
±3% of expected inverse time or 1
cycle, whichever is greater
Level Accuracy: per CT input
OVERFREQUENCY (81O)
Pickup Level: 40.00 to 70.00 Hz in steps of 0.01
Dropout Level: Pickup -0.03 Hz
Time Delay: 0.0 to 600.0 s in steps of 0.1
Time Delay
Accuracy:
0 to 6 cycles (Time Delay selected)
Operate Time: Typically 10 cycles @ 0.1Hz/s
change
Level Accuracy: ±0.01 Hz
METERING SPECIFICATIONS
Parameter Accuracy Resolution Range
3-Phase Real Power (MW) ±1% of full scale 0.1 MW ±3000 MW
3-Phase Reactive Power
(Mvar)
±1% of full scale 0.1 Mvar ±3000 Mvar
3-Phase Apparent Power
(MVA)
±1% of full scale 0.1 MVA 3000 MVA
Power Factor ±0.05 0.01 -0.99 to 1.00
Frequency ±0.05 Hz 0.01 Hz 40.00 to 70.00 Hz
EVENT RECORDER
Number of events: 256
Header: relay name, order code, firmware
revision
Content: event number, date of event, cause
of event, per-phase current, ground
current, sensitive ground current,
neutral current, per-phase voltage
(VTs connected in “Wye”), or phase-
phase voltages (VTs connected in
“Delta”), system frequency, power,
power factor, thermal capacity
Data Storage: Retained for 3 days
CLOCK
Setup: Date and time Daylight Saving Time
IRIG-B: Auto-detect (DC shift or Amplitude
Modulated)
Amplitude modulated: 1 to 10 V pk-pk
DC shift: TTL
Input impedance: 40kOhm ± 10%
RTC Accuracy: ± 1 min / month
LOGIC ELEMENTS
Number of logic
elements:
8
Trigger source
inputs per
element:
3
Block inputs per
element:
3
Supported
operations:
AND, OR, NOT, Pickup / Dropout
timers
Pickup timer: 0 to 6000 ms in steps of 1 ms
Dropout timer: 0 to 6000 ms in steps of 1 ms
BREAKER CONTROL
Operation: Asserted Contact Input , Logic
Element , Virtual Input , Manual
Command
Function: Opens / closes the feeder breaker
AUTORECLOSE
Reclose attempts: Up to 4 shots
Time Delay
Accuracy:
0 to 3 cycles (AR Dead Time selected)
Elements: Inputs, Outputs, Breaker Status (52
status)
BREAKER FAILURE
Pickup Level: 0.05 to 20.00 x CT in steps of 0.01
Dropout Level: 97 to 98% of pickup
Time Delay
Accuracy:
0 to 1 cycle (Timer 1, Timer 2)
Level Accuracy: per CT input
COLD LOAD PICKUP BLOCKING
Operation: Automatically (current level), or by
command (asserted input)
Function: Block IOC functions, raise TOC pickup,
for selected period of
time
Time Delay
Accuracy:
0 to 1 cycle (block Time)
±50 ms (outage time? ≤?5 min)
±1 s (outage time > 5 min)
AMBIENT TEMPERATURE
High Temperature
Pickup:
20°C to 80°C in steps of 1°C
Low Temperature
Pickup:
-40°C to 20°C in steps of 1°C
Time Delay: 1 to 60 min in steps of 1 min
±50 ms (outage time? ≤?5 min)
±1 s (outage time > 5 min)
Temperature
Dropout:
Configurable 90 to 98% of pickup
Temperature
Accuracy:
±10°C
Timing Accuracy: ±1 second
BREAKER TRIP COUNTER
Trip Counter Limit
(Pickup):
1 to 10000 in steps of 1
TRANSIENT RECORDER
Buffer size: 3 s
No. of buffers: 1x192, 3x64, 6x32
No. of channels: 14
Sampling rate: 32 samples per cycle
Triggers: Manual Command
Contact Input
Virtual Input
Logic Element
Element Pickup/Trip/Dropout/Alarm
Data: AC input channels
Contact input state
Contact output state
Virtual input state
Logic element state
Data storage: RAM - battery backed-up
PHASE/NEUTRAL/GROUND NEGATIVE SEQUENCE
INSTANTANEOUS OVERCURRENT (50P/50N/50G/50_2)
Pickup Level: 0.05 to 20 x CT in steps of 0.01 x CT
Dropout Level: 97 to 99% of Pickup @ I > 1 x CT
Pickup - 0.02 x CT @ I <1 x CT
Time delay: 0.00 to 300.00 sec in steps of 0.01
Operate Time: <30 ms @ 60Hz (I > 2.0 x PKP, No time
delay)
<35 ms @ 50Hz (I > 2.0 x PKP, No time
delay)
Time Delay
Accuracy:
0 to 1 cycle (Time Delay selected)
Level Accuracy: per CT input
SENSITIVE GROUND INSTANTANEOUS OVERCURRENT
(50SG)
Pickup Level: 0.005 to 3 x CT in steps of 0.001 x CT
Dropout Level: 97 to 99% of Pickup @ I > 0.1 x CT
Pickup - 0.002 x CT @ I < 0.1 x CT
Time delay: 0.00 to 300.00 sec in steps of 0.01
Operate Time: <30 ms @ 60Hz (I > 2.0 x PKP, No time
delay)
<35 ms @ 50Hz (I > 2.0 x PKP, No time
delay)
Time Delay
Accuracy:
0 to 1 cycle (Time Delay selected)
Level Accuracy: per CT input
NEUTRAL DIRECTIONAL
Directionality: Co-existing forward and reverse
Polarizing: Voltage, Current, Dual
Polarizing Voltage: V0 calculated using phase voltages
(VTs must be
connected in “Wye”)
- V
0
measured by Vaux input (3V0
provided by an external
open delta connection).
Polarizing Current: Ig
MTA: From 0° to 359° in steps of 1°
Angle Accuracy: ±4º
Operation Delay: 20 to 30 ms
GROUND DIRECTIONAL
Directionality: Co-existing forward and reverse
Operating: Ground Current (Ig)
Polarizing Voltage: V0 calculated using phase voltages
(VTs must be connected
in “Wye”)
- V0 measured from Vaux input. (3V0
provided by an external
open delta connection).
MTA: From 0° to 359° in steps of 1°
Angle Accuracy: ±4º
Operation Delay: 20 to 30 ms
PHASE/AUXILIARY UNDERVOLTAGE (27P/27X)
Minimum Voltage: Programmable from 0.00 to 1.25 x VT
in steps of 0.01
Pickup Level: 0.00 to 1.25 x VT in steps of 0.01
Dropout Level: 101 to 104% of pickup
Curve: Definite Time, Inverse Time
Time Delay: 0.0 to 600.0 s in steps of 0.1
Operate Time: Time delay ±30 ms @ 60Hz (V < 0.85
x PKP)
Time delay ±40 ms @ 50Hz (V < 0.85
x PKP)
Time Delay
Accuracy:
±3% of expected inverse time or 1
cycle, whichever is greater
Level Accuracy: Per voltage input
PHASE/AUXILIARY/NEUTRAL/NEG SEQ OVERVOLTAGE
(59P/59X/59N/59_2)
Minimum Voltage: Programmable from 0.00 to 1.25 x VT
in steps of 0.01
Pickup Level: 0.00 to 1.25 x VT in steps of 0.01
Dropout Level: 96 to 99% of pickup
Time Delay: 0.0 to 600.0 s in steps of 0.1
Operate Time: Time delay ±35 ms @ 60Hz (V > 1.1
x PKP)
Time delay ±40 ms @ 50Hz (V > 1.1
x PKP)
Time Delay
Accuracy:
0 to 1 cycle (Time Delay selected)
Level Accuracy: Per voltage input
UNDERFREQUENCY (81U)
Minimum Voltage: 0.00 to 1.25 x VT in steps of 0.01
Pickup Level: 40.00 to 70.00 Hz in steps of 0.01
Dropout Level: 0.03 Hz
Time Delay: 0.0 to 600.0 s in steps of 0.1
Time Delay
Accuracy:
0 to 6 cycles (Time Delay selected)
Operate Time: Typically 10 cycles @ 0.1Hz/s
change
Level Accuracy: ±0.01 Hz