Autorecloser For 1 Phase, 2 Phase And/Or 3 Phase Operation Smbrrec; Identification; Application - ABB REQ650 Applications Manual

1MRK 505 383-UEN A
9.2
9.2.1
9.2.2
Breaker protection REQ650 2.2 IEC
Application manual
via the extinguishing capacitors in the circuit breakers. This voltage
can be as high as 30% or more of the base line voltage.
Because the setting ranges of the threshold voltages UHighBusEnerg/
UHighLineEnerg and ULowBusEnerg/ULowLineEnerg partly overlap each other,
the setting conditions may be such that the setting of the non-energized threshold
value is higher than that of the energized threshold value. The parameters must
therefore be set carefully to avoid overlapping.
UMaxEnerg
This setting is used to block the closing when the voltage on the live side is above
the set value of UMaxEnerg.
tAutoEnerg and tManEnerg
The purpose of the timer delay settings, tAutoEnerg and tManEnerg, is to ensure
that the dead side remains de-energized and that the condition is not due to a
temporary interference. Should the conditions not persist for the specified time, the
delay timer is reset and the procedure is restarted when the conditions are fulfilled
again. Circuit breaker closing is thus not permitted until the energizing condition
has remained constant throughout the set delay setting time.
Autorecloser for 1 phase, 2 phase and/or 3 phase
operation SMBRREC

Identification

Function Description
Autorecloser for 1 phase, 2 phase and/or 3
phase

Application

Automatic reclosing is a well-established method for the restoration of service in a
power system after a transient line fault. The majority of line faults are flashovers,
which are transient by nature. When the power line is switched off by the operation
of line protection and line breakers, the arc de-ionizes and recovers its ability to
withstand voltage at a somewhat variable rate. Thus, a certain dead time with a de-
energized line is necessary. Line service can then be resumed by automatic
IEC 61850 IEC 60617
identification identification
SMBRREC
5(0 -->1)
IEC15000204 V1 EN-US
Section 9
Control
IP14559-1 v6
M14890-1 v7
ANSI/IEEE C37.2
device number
79
M12391-3 v8
147