Monitoring - GE L90 Instruction Manual

SPECIFICATIONS
DIGITAL ELEMENTS
Number of elements:
Operating signal:
Pickup delay:
Dropout delay:
Timing accuracy:

2.6.3 Monitoring

2
OSCILLOGRAPHY
Maximum records:
Sampling rate:
Triggers:
Data:
Data storage:
EVENT RECORDER
Capacity:
Time-tag:
Triggers:
Data storage:
DATA LOGGER
Number of channels:
Parameters:
Sampling rate:
Trigger:
Mode:
Storage capacity:
FAULT LOCATOR
Number of independent fault locators: 1 per CT bank (to a maximum of 4)
Method:
Voltage source:
Maximum accuracy if:
Relay accuracy:
Worst-case accuracy:
VT +
%error
CT +
%error
Z +
Line%error
METHOD +
%error
RELAY ACCURACY
%error
PHASOR MEASUREMENT UNIT
Output format:
Number of channels:
2-42
48
any FlexLogic operand
0.000 to 999999.999 s in steps of 0.001
0.000 to 999999.999 s in steps of 0.001
±3% or ±4 ms, whichever is greater
64
64 samples per power cycle
any element pickup, dropout, or operate; contact input change of state; contact output change
of state; FlexLogic equation
AC input channels; element state; contact input state; contact output state
in non-volatile memory
1024 events
to 1 microsecond
any element pickup, dropout, or operate; contact input change of state; contact output 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
multi-ended or single-ended during channel failure
wye-connected VTs, delta-connected VTs and neutral voltage, delta-connected VTs and zero-
sequence current (approximation)
fault resistance is zero or fault currents from all line terminals are in phase
±1.5% (V > 10 V, I > 0.1 pu)
user data
user data
user data
0.5% (multi-ended method)
See Theory of Operation chapter (single-ended method)
+ 1.5%
per IEEE C37.118 or IEC 61850-90-5 standard
14 synchrophasors, 8 analogs, 16 digitals
CHAPTER 2: PRODUCT DESCRIPTION
L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL