GE Multilin L60, Instruction Manual

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2-18 L60 Line Phase Comparison System GE Multilin
2.3 SPECIFICATIONS 2 PRODUCT DESCRIPTION
2
AUTORECLOSURE
Two breakers applications
Single- and three-pole tripping schemes
Up to 4 reclose attempts before lockout
Selectable reclosing mode and breaker sequence
PILOT-AIDED SCHEMES
Permissive Overreaching Transfer Trip (POTT)
TRIP OUTPUT
Collects trip and reclose input requests and issues outputs to con-
trol tripping and reclosing.
Communications timer delay: 0 to 65535 s in steps of 0.001
Evolving fault timer:
0.000 to 65.535 s in steps of 0.001
Timer accuracy: ±3% of operate time or ±1/4 cycle
(whichever is greater)
POWER SWING DETECT
Functions: Power swing block, Out-of-step trip
Characteristic: Mho or Quad
Measured impedance: Positive-sequence
Blocking / tripping modes: 2-step or 3-step
Tripping mode:
Early or Delayed
Current supervision:
Pickup level: 0.050 to 30.000 pu in steps of 0.001
Dropout level: 97 to 98% of pickup
Fwd / reverse reach (sec.

): 0.10 to 500.00

in steps of 0.01
Left and right blinders (sec.

): 0.10 to 500.00

in steps of 0.01
Impedance accuracy: ±5%
Fwd / reverse angle impedances: 40 to 90° in steps of 1
Angle accuracy:
±2°
Characteristic limit angles: 40 to 140° in steps of 1
Timers:
0.000 to 65.535 s in steps of 0.001
Timer accuracy: ±3% of operate time or ±1/4 cycle
(whichever is greater)
LOAD ENCROACHMENT
Responds to: Positive-sequence quantities
Minimum voltage: 0.000 to 3.000 pu in steps of 0.001
Reach (sec.

): 0.02 to 250.00

in steps of 0.01
Impedance accuracy: ±5%
Angle: 5 to 50° in steps of 1
Angle accuracy: ±2°
Pickup delay: 0 to 65.535 s in steps of 0.001
Reset delay: 0 to 65.535 s in steps of 0.001
Timer accuracy: ±3% of operate time or ±1/4 cycle
(whichever is greater)
Operate time: <30 ms at 60 Hz
OPEN POLE DETECTOR
Functionality: Detects an open pole condition, monitor-
ing breaker auxiliary contacts, the cur-
rent in each phase and optional voltages
on the line
Current pickup level: 0.000 to 30.000 pu in steps of 0.001
Line capacitive reactances ( X
C 1
, X
C 0
): 300.0 to 9999.9 sec.

in
steps of 0.1
Remote current pickup level: 0.000 to 30.000 pu in steps of 0.001
Current dropout level:
3%, not less than 0.05 pu
THERMAL OVERLOAD PROTECTION
Thermal overload curves: IEC 255-8 curve
Base current:
0.20 to 3.00 pu in steps of 0.01
Overload ( k ) factor: 1.00 to 1.20 pu in steps of 0.05
Trip time constant: 0 to 1000 min. in steps of 1
Reset time constant: 0 to 1000 min. in steps of 1
Minimum reset time: 0 to 1000 min. in steps of 1
Timer accuracy (cold curve): ±100 ms or 2%, whichever is greater
Timer accuracy (hot curve): ±500 ms or 2%, whichever is greater
for I
p
< 0.9 × k × I
b
and I / ( k × I
b
) > 1.1
TRIP BUS (TRIP WITHOUT FLEXLOGIC)
Number of elements: 6
Number of inputs: 16
Operate time: <2 ms at 60 Hz
Timer accuracy: ±3% or 10 ms, whichever is greater
2.3.2 USER-PROGRAMMABLE ELEMENTS
FLEXLOGIC
Programming language: Reverse Polish Notation with graphical
visualization (keypad programmable)
Lines of code: 512
Internal variables: 64
Supported operations: NOT, XOR, OR (2 to 16 inputs), AND (2
to 16 inputs), NOR (2 to 16 inputs),
NAND (2 to 16 inputs), latch (reset-domi-
nant), edge detectors, timers
Inputs: any logical variable, contact, or virtual
input
Number of timers: 32
Pickup delay: 0 to 60000 (ms, sec., min.) in steps of 1
Dropout delay: 0 to 60000 (ms, sec., min.) in steps of 1
FLEXCURVES™
Number: 4 (A through D)
Reset points: 40 (0 through 1 of pickup)
Operate points: 80 (1 through 20 of pickup)
Time delay: 0 to 65535 ms in steps of 1
FLEX STATES
Number: up to 256 logical variables grouped
under 16 Modbus addresses
Programmability: any logical variable, contact, or virtual
input