User-Programmable Elements - GE L90 Instruction Manual

2.4 SPECIFICATIONS
SYNCHROCHECK
Max voltage difference: 0 to 400000 V in steps of 1
Max angle difference:
Max freq. difference:
Hysteresis for max. freq. diff.: 0.00 to 0.10 Hz in steps of 0.01
Dead source function:
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
Direct Underreaching Transfer Trip (DUTT)
Permissive Underreaching Transfer Trip (PUTT)
Permissive Overreaching Transfer Trip (POTT)
Hybrid POTT Scheme
Directional Comparison Blocking Scheme
Directional Comparison Unblocking Scheme (DCUB)
TRIP OUTPUT
Collects trip and reclose input requests and issues outputs to con-
Communications timer delay: 0 to 65535 s in steps of 0.001
Evolving fault timer:
Timing accuracy:
POWER SWING DETECT
Functions:
Characteristic:
Measured impedance:
Blocking / tripping modes: 2-step or 3-step
Tripping mode:
Current supervision:
Pickup level:
Dropout level:
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:
Fwd / reverse angle impedances: 40 to 90° in steps of 1
Angle accuracy:
Characteristic limit angles: 40 to 140° in steps of 1
Timers:
Timing accuracy:
FLEXLOGIC
Programming language: Reverse Polish Notation with graphical
Lines of code:
Internal variables:
Supported operations:
2-20
°
0 to 100 in steps of 1
0.00 to 2.00 Hz in steps of 0.01
None, LV1 & DV2, DV1 & LV2, DV1 or
DV2, DV1 xor DV2, DV1 & DV2
(L = Live, D = Dead)
trol tripping and reclosing.
0.000 to 65.535 s in steps of 0.001
±3% or 4 ms, whichever is greater
Power swing block, Out-of-step trip
Mho or Quad
Positive-sequence
Early or Delayed
0.050 to 30.000 pu in steps of 0.001
97 to 98% of pickup
±5%
±2°
0.000 to 65.535 s in steps of 0.001
±3% or 4 ms, whichever is greater
visualization (keypad programmable)
512
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-domi-
nant), edge detectors, timers
L90 Line Current Differential System
2 PRODUCT DESCRIPTION
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
Time accuracy: ±3% or ±4 ms, 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 , X
C1
steps of 0.1
Remote current pickup level: 0.000 to 30.000 pu in steps of 0.001
Current dropout level: pickup + 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
Timing accuracy (cold curve): ±100 ms or 2%, whichever is
greater
Timing accuracy (hot curve): ±500 ms or 2%, whichever is greater
for I < 0.9 × k × I
p
TRIP BUS (TRIP WITHOUT FLEXLOGIC)
Number of elements: 6
Number of inputs: 16
Operate time: <2 ms at 60 Hz
Time accuracy: ±3% or 10 ms, whichever is greater

2.4.2 USER-PROGRAMMABLE ELEMENTS

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
): 300.0 to 9999.9 sec.  in
C0
and I / (k × I ) > 1.1
b b
GE Multilin