User-Programmable Elements - GE L90 Instruction Manual
Line current differential system
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- Instruction manual (900 pages) ,
- Communications manual (532 pages) ,
- Instruction manual (832 pages)
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SPECIFICATIONS
Minimum voltage:
Reach (sec. Ω):
Impedance accuracy:
Angle:
Angle accuracy:
Pickup delay:
Reset delay:
Timer accuracy:
2
Operate time:
OPEN POLE DETECTOR
Functionality:
Current pickup level:
Line capacitive reactances (X
Remote current pickup level:
Current dropout level:
THERMAL OVERLOAD PROTECTION
Thermal overload curves:
Base current:
Overload (k) factor:
Trip time constant:
Reset time constant:
Minimum reset time:
Timer accuracy (cold curve):
Timer accuracy (hot curve):
TRIP BUS (TRIP WITHOUT FLEXLOGIC)
Number of elements:
Number of inputs:
Operate time:
Timer accuracy:
2.6.2 User-programmable elements
FLEXLOGIC
Programming language:
Lines of code:
Internal variables:
Supported operations:
Inputs:
Number of timers:
Pickup delay:
Dropout delay:
FLEXCURVES™
Number:
Reset points:
Operate points:
Time delay:
FLEX STATES
Number:
Programmability:
2-40
0.004 to 3.000 pu in steps of 0.001
0.02 to 250.00 Ω in steps of 0.01
±5%
5 to 50° in steps of 1
±2°
0 to 65.535 s in steps of 0.001
0 to 65.535 s in steps of 0.001
±3% of operate time or ±1/4 cycle (whichever is greater)
<30 ms at 60 Hz
Detects an open pole condition, monitoring breaker auxiliary contacts, the current in each
phase, and optional voltages on the line
0.020 to 30.000 pu in steps of 0.001
, X
):
300.0 to 9999.9 sec. Ω in steps of 0.1
C1
C0
0.000 to 30.000 pu in steps of 0.001
pickup + 3%, not less than 0.05 pu
IEC 255-8 curve
0.20 to 3.00 pu in steps of 0.01
1.00 to 1.20 pu in steps of 0.05
0 to 1000 min. in steps of 1
0 to 1000 min. in steps of 1
0 to 1000 min. in steps of 1
±100 ms or 2%, whichever is greater
±500 ms or 2%, whichever is greater for I
6
16
<2 ms at 60 Hz
±3% or 10 ms, whichever is greater
Reverse Polish Notation with graphical visualization (keypad programmable)
1024
64
NOT, XOR, OR (2 to 16 inputs), AND (2 to 16 inputs), NOR (2 to 16 inputs), NAND (2 to 16 inputs),
latch (reset-dominant), edge detectors, timers
any logical variable, contact, or virtual input
32
0 to 60000 (ms, sec., min.) in steps of 1
0 to 60000 (ms, sec., min.) in steps of 1
4 (A through D)
40 (0 through 1 of pickup)
80 (1 through 20 of pickup)
0 to 65535 ms in steps of 1
up to 256 logical variables grouped under 16 Modbus addresses
any logical variable, contact, or virtual input
CHAPTER 2: PRODUCT DESCRIPTION
< 0.9 × k × I
and I / (k × I
p
b
L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
) > 1.1
b
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