Monitoring - GE L90 Instruction Manual

2.4 SPECIFICATIONS
FLEXELEMENTS™
Number of elements:
Operating signal:
Operating signal mode: Signed or Absolute Value
Operating mode:
Comparator direction:
2
Pickup Level:
Hysteresis:
Delta dt:
Pickup & dropout delay: 0.000 to 65.535 s in steps of 0.001
NON-VOLATILE LATCHES
Type:
Number:
Output:
Execution sequence:
USER-PROGRAMMABLE LEDs
Number:
Programmability:
Reset mode:
OSCILLOGRAPHY
Maximum records:
Sampling rate:
Triggers:
Data:
Data storage:
EVENT RECORDER
Capacity:
Time-tag:
Triggers:
Data storage:
2-16
8
any analog actual value, or two values in
differential mode
Level, Delta
Over, Under
–30.000 to 30.000 pu in steps of 0.001
0.1 to 50.0% in steps of 0.1
20 ms to 60 days
Set-dominant or Reset-dominant
16 (individually programmed)
Stored in non-volatile memory
As input prior to protection, control, and
FlexLogic™
48 plus Trip and Alarm
from any logical variable, contact, or vir-
tual input
Self-reset or Latched
64
64 samples per power cycle
Any element pickup, dropout or operate
Digital input change of state
Digital output change of state
FlexLogic™ equation
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 output change of state
Self-test events
In non-volatile memory
L90 Line Differential Relay
2 PRODUCT DESCRIPTION
LED TEST
Initiation: from any digital input or user-program-
mable condition
Number of tests: 3, interruptible at any time
Duration of full test: approximately 3 minutes
Test sequence 1: all LEDs on
Test sequence 2: all LEDs off, one LED at a time on for 1 s
Test sequence 3: all LEDs on, one LED at a time off for 1 s
USER-DEFINABLE DISPLAYS
Number of displays: 16
2 × 20 alphanumeric characters
Lines of display:
Parameters: up to 5, any Modbus register addresses
Invoking and scrolling: keypad, or any user-programmable con-
dition, including pushbuttons
CONTROL PUSHBUTTONS
Number of pushbuttons: 7
Operation: drive FlexLogic™ operands
USER-PROGRAMMABLE PUSHBUTTONS (OPTIONAL)
Number of pushbuttons: 12
Mode: Self-Reset, Latched
Display message: 2 lines of 20 characters each
SELECTOR SWITCH
Number of elements: 2
Upper position limit: 1 to 7 in steps of 1
Selecting mode: Time-out or Acknowledge
Time-out timer: 3.0 to 60.0 s in steps of 0.1
Control inputs: step-up and 3-bit
Power-up mode: restore from non-volatile memory or syn-
chronize to a 3-bit control input
DATA LOGGER
Number of channels: 1 to 16
Parameters: Any available analog actual value
Sampling rate: 1 sec.; 1, 5, 10, 15, 20, 30, 60 min.
Storage capacity: (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
FAULT LOCATOR
Method: Single-ended
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 + (Chapter 6)
%error
RELAY ACCURACY
%error

2.4.3 MONITORING

+ (1.5%)
GE Multilin