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:
LED TEST
Initiation:
Number of tests:
Duration of full test:
Test sequence 1:
Test sequence 2:
Test sequence 3:
OSCILLOGRAPHY
Maximum records:
Sampling rate:
Triggers:
Data:
Data storage:
EVENT RECORDER
Capacity:
Time-tag:
Triggers:
Data storage:
2-22
8
any analog actual value, or two values in
differential mode
level, delta
over, under
–90.000 to 90.000 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
from any digital input or user-program-
mable condition
3, interruptible at any time
approximately 3 minutes
all LEDs on
all LEDs off, one LED at a time on for 1 s
all LEDs on, one LED at a time off for 1 s
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
L90 Line Current Differential System
2 PRODUCT DESCRIPTION
USER-DEFINABLE DISPLAYS
Number of displays: 16
Lines of display: 2 20 alphanumeric characters
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 (standard faceplate);
16 (enhanced faceplate)
Mode: self-reset, latched
Display message: 2 lines of 20 characters each
Drop-out timer: 0.00 to 60.00 s in steps of 0.05
Autoreset timer: 0.2 to 600.0 s in steps of 0.1
Hold timer: 0.0 to 10.0 s in steps of 0.1
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 or synch/
restore mode
DIGITAL ELEMENTS
Number of elements: 48
Operating signal: any FlexLogic™ operand
Pickup delay: 0.000 to 999999.999 s in steps of 0.001
Dropout delay: 0.000 to 999999.999 s in steps of 0.001
Timing accuracy: ±3% or ±4 ms, whichever is greater
DATA LOGGER
Number of channels: 1 to 16
Parameters: any available analog actual value
Sampling rate: 15 to 3600000 ms in steps of 1
Trigger: any FlexLogic™ operand
Mode: continuous or triggered
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

2.4.3 MONITORING

GE Multilin