ABB Relion 670 series - Page 537

AND
AND
t
tStartTimeout
30ms
NOT
BLOCK
int reset
NOT
AND
S
R
Q
int startAlarmA
int startA
NOT
OR
AND
NOT
TRBU
StartMode
1
LatchedStart
FollowStart
FollowStart&Mode
PICKUP
OR
BFI_A
OR
STALARM
int startAlarmB
int startAlarmC
From other
phases
OR
ANSI18001005-1-en.vsdx
ANSI18001005 V1 EN-US
Figure 278: Start logic for all three Function Modes of operation
t
150 ms
t
150 ms
int startA
ANDAND
ANDAND
NOTNOT
52A_A
OROR
int reset
t
t1
t
t1
t
t2
t
t2
NOTNOT
t
t2MPh
t
t2MPh
OROR
FunctionModeFunctionMode
11
Current
CB Pos
Current or CB Pos
OROR
OROR
a>b
a
b
a>b
a
b
IA
IPPUIPPU
ANDAND
ANSI18001007-1-en.vsdx
ANSI18001007 V1 EN-US
Figure 279: Reset logic in latched mode
1MRK 502 066-UUS B Section 8
Current protection
531
Technical manual