Hitachi Relion 670 Series Applications Manual page 216

Section 12
Control
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.
12.2 Autoreclosing for railway system SMBRREC
12.2.1 Function revision history
Document
revision
B
C
D
E
F
G
H
J
K
K
L
M
N
12.2.2 Identification
Function Description
Autoreclosing for railway system
12.2.3 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 reclosing
of the line breakers. The dead time selected should be long enough to ensure a high probability of
arc de-ionization and successful reclosing.
210
Product History
revision
2.2.1 -
2.2.2 -
2.2.2
2.2.2 -
2.2.3 -
2.2.3 -
2.2.3 -
2.2.4 -
2.2.4 -
2.2.4
2.2.5 The settings AutoContinue and tAutoContWaitare added to have the possibility to get the
Autorecloser to continue, with next reclosing shot, if the circuit breaker did not close.
2.2.6 -
2.2.6 -
© 2017 - 2023 Hitachi Energy. All rights reserved
IEC 61850 IEC 60617
identification identification
SMBRREC
5(0 -->1)
IEC15000204 V1 EN-US
1MRK506375-UEN Rev. N
IP14559-1 v6
GUID-8ABA6AD9-03E9-4781-994D-54817AA9E46A v2
M14890-1 v7
ANSI/IEEE C37.2
device number
79
M12391-3 v8
Railway application RER670
Application manual