Monitoring - GE L90 Instruction Manual

2.4 SPECIFICATIONS
OSCILLOGRAPHY
Maximum records:
Sampling rate:
Triggers:
2
Data:
Data storage:
EVENT RECORDER
Capacity:
Time-tag:
Triggers:
Data storage:
DATA LOGGER
Number of channels:
Parameters:
Sampling rate:
Trigger:
Mode:
Storage capacity:
RMS CURRENT: PHASE, NEUTRAL, AND GROUND
Accuracy at
0.1 to 2.0 × CT rating: ±0.25% of reading or ±0.1% of rated
> 2.0 × CT rating:
RMS VOLTAGE
Accuracy:
REAL POWER (WATTS)
Accuracy:
REACTIVE POWER (VARS)
Accuracy:
2-22
64
64 samples per power cycle
any element pickup, dropout, or operate;
digital input change of state; digital out-
put change of state; FlexLogic™ equa-
tion
AC input channels; element state; digital
input state; digital output state
in non-volatile memory
1024 events
to 1 microsecond
any element pickup, dropout, or operate;
digital input change of state; digital out-
put change of state; self-test events
in non-volatile memory
1 to 16
any available analog actual value
15 to 3600000 ms in steps of 1
any FlexLogic™ operand
continuous or triggered
(NN is dependent on memory)
1-second rate:
01 channel for NN days
16 channels for NN days
↓
60-minute rate:
01 channel for NN days
16 channels for NN days
(whichever is greater)
±1.0% of reading
±0.5% of reading from 10 to 208 V
±1.0% of reading at
–0.8 < PF ≤ –1.0 and 0.8 < PF ≤ 1.0
±1.0% of reading at –0.2 ≤ PF ≤ 0.2
L90 Line Current Differential System
2 PRODUCT DESCRIPTION
FAULT LOCATOR
Method: multi-ended or single-ended during
channel failure
Voltage source: wye-connected VTs, delta-connected
VTs and neutral voltage, delta-connected
VTs and zero-sequence current (approxi-
mation)
Maximum accuracy if: fault resistance is zero or fault currents
from all line terminals are in phase
Relay accuracy: ±1.5% (V > 10 V, I > 0.1 pu)
Worst-case accuracy:
VT + user data
%error
CT + user data
%error
Z + user data
Line%error
METHOD + 0.5% (multi-ended method), see chapter
%error
8 (single-ended method)
RELAY ACCURACY + (1.5%)
%error
PHASOR MEASUREMENT UNIT
Output format: per IEEE C37.118 standard
Number of channels: 14 synchrophasors, 8 analogs, 16 digi-
tals
TVE (total vector error) <1%
Triggering: frequency, voltage, current, power, rate
of change of frequency, user-defined
Reporting rate: 1, 2, 5, 10, 12, 15, 20, 25, 30, 50, or 60
times per second
Number of clients: One over TCP/IP port, two over UDP/IP
ports
AC ranges: As indicated in appropriate specifications
sections
Network reporting format: 16-bit integer or 32-bit IEEE floating
point numbers
Network reporting style: rectangular (real and imaginary) or polar
(magnitude and angle) coordinates
Post-filtering: none, 3-point, 5-point, 7-point
Calibration: ±5°
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

2.4.3 MONITORING

2.4.4 METERING
6
MWh
6
Mvarh
GE Multilin