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5.5 ELEMENTOS AGRUPADOS
(|ID| < SL x IR or |ID| < PICKUP)
AND
(NOT (SC)) for 200 msec
PRINCIPIO DE COMPARACIÓN DE FASE:
La prueba para dirección puede ser resumida por la siguiente ecuación:
(
>
Si I
B
o
TS
L
5
entonces DIR
otro DIR
1
=
donde: I
= corriente de restricción
R
DIR = bandera indicando que el principio de comparación de fase se encuentra satisfecho
B
= ajuste del punto de ruptura 1
L
I
, I
= corriente en las fuentes térmica y de neutro, respectivamente
TS
NS
K = constante de fábrica de 0.5
5-86
NORMAL
SAT := 0
EXTERNAL
FAULT
SAT := 1
DIF=1
EXTERNAL
FAULT & CT
SATURATION
SAT := 1
Figura 5–48: ESQUEMA LÓGICO DEL DIFERENCIAL DEL ESTATOR
(
>
⋅
>
I
K I
y I
0.1 pu
TS
R
TS
(
∠
∠
) 90°
>
abs
I
I
=
–
TS
NS
FLEXLOGIC OPERANDS
STATOR DIFF PKP A
STATOR DIFF SAT A
OR
STATOR DIFF DIR A
FLEXLOGIC OPERANDS
STATOR DIFF PKP B
STATOR DIFF SAT B
OR
STATOR DIFF DIR B
FLEXLOGIC OPERANDS
STATOR DIFF PKP C
STATOR DIFF SAT C
OR
STATOR DIFF DIR C
Figura 5–49: LÓGICA DE SALIDA DEL DIFERENCIAL DEL ESTATOR
M60 relé para protección de motor
SC = (|ID| < SL x IR) and (IR > BL)
where: IR = restraint current
ID = differential current
DIF = stator differential pickup flag
SC
SL = slope 1 setting
("saturation condition")
BL = break point 1 setting
PICKUP = pickup setting
DIF=0
for 100 msec
)
) y
(
>
(
>
I
B
o
I
K I
NS
L
NS
FLEXLOGIC OPERAND
AND
STATOR DIFF OP A
FLEXLOGIC OPERAND
AND
STATOR DIFF OP B
FLEXLOGIC OPERAND
AND
STATOR DIFF OP C
FLEXLOGIC OPERAND
OR
STATOR DIFF OP
5 AJUSTES
⋅
>
)
)
y I
0.1 pu
R
NS
842707A1.CDR
GE Multilin
(EC 5.14)
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