ABB Relion 670 Series Applications Manual page 189

1MRK 511 401-UUS F
PICKUP
Current Check
CB Position Check
ANSI18001003 V1 EN-US
Figure 86: Simplified overall logic for FollowStart
PICKUP
Current Check
CB Position Check
ANSI18001004 V1 EN-US
Figure 87: Simplified overall logic for FollowStart&Mode
RetripMode : This setting defines how the retrip function shall operate. Refer to Table
details.
Table 25:
RetripMode
Off
UseFunctionMode
Always
BuTripMode : Defines how many current criterias to be fulfilled in order to detect failure of the
breaker. For
currents and the residual current, shall be high to indicate breaker failure.
least one current of the three-phase currents shall be high to indicate breaker failure.
means that at least one current of the three phase currents or the residual current shall be high to
Bay control REC670
Application manual
t1 t1
t t
OR
t2 t2
t t
OR
Dependencies between parameters RetripMode and FunctionMode
Current operation 2 out of 4 means that at least two currents, of the three-phase
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OR OR
AND
AND
OR OR
ANSI18001003-1-en.vsdx
t1
AND
t
t2
t
FunctionMode
N/A
Current
CB Pos
Current or CB Pos
N/A
Current protection
TRRET
TRBU
TRRET
TRBU
ANSI18001004-1-en.vsdx
25
Description
The retrip function is disabled
A phase current should be larger
than the set operate level to allow
t1 timer elapses
retrip once the
retrip is done when the breaker
position indicates that breaker is
still closed after retrip time has
elapsed
Both the methods are used
retrip is always given when
elapses without any further checks
1 out of 3 means that at
1 out of 4
Section 8
for more
t1
183