•
If
CB failure trip mode
is set to "1 out of 3", the resetting logic requires that the
values of all the phase currents drop below the
Current value
setting.
•
If
CB failure trip mode
is set to "1 out of 4", the resetting logic requires that the
values of the phase currents and the residual current drops below the
Current
value
and
Current value Res
setting respectively.
•
If
CB failure trip mode
is set to "2 out of 4", the resetting logic requires that the
values of all the phase currents and the residual current drop below the
Current
value
and
Current value Res
setting.
•
If
CB failure mode
is set to the "Breaker status" mode, the resetting logic requires that
the circuit breaker is in the open condition.
•
If the
CB failure mode
setting is set to "Both", the resetting logic requires that the
circuit breaker is in the open condition and the values of the phase currents and the
residual current drops below the
Current value
and
Current value Res
setting
respectively.
The activation of the
BLOCK
input resets the function.
AND
TON
150.0
ms
CB failure mode ”Current”
CB failure mode ”Breaker
status”
POSCLOSE
CB failure trip mode
“1 out of 4"
IG OR I
0
>
From Level detector 2
I >
From Level detector 1
Set
Reset
Enable timer
BLOCK
AND
OR
Pickup latching mode
”Level sensitive”
AND
PICKUP
AND
OR
CB failure trip mode
“1 out of 3"
CB failure trip mode
“2 out of 4"
OR
AND
OR
AND
GUID-623C4380-BE93-4A7D-B65F-293C304D5691 V1 EN
Figure 389:
Start logic
1MAC059074-MB A
Section 5
Protection related functions
615 series ANSI
775
Technical Manual
Summary of Contents for Relion 615 series
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