Hitachi Relion 670 Series Applications Manual page 223

1MRK506375-UEN Rev. N
STARTHS, Start high-speed auto reclosing
It may be used when one wants to use two different dead times in different protection trip operations.
This input starts the dead time t1_HS. High-speed reclosing shot 1 started by this input is without a
synchronization check.
SYNC
This input is connected to the internal synchrocheck function when required or to an external device
for synchronism. If neither internal nor external synchronism or energizing check is required, it can be
connected to a permanently high source, TRUE. The signal is required for shots 1-5 to proceed
(Note! Not the high-speed step).
THOLHOLD
Signal "Thermal overload protection holding back auto reclosing". It can be connected to a thermal
overload protection trip signal which resets only when the thermal content has fallen to an acceptable
level, for example, 70%. As long as the signal is high, indicating that the line is hot, the auto reclosing
is held back. When the signal resets, a reclosing cycle will continue. Observe that this have a
considerable delay. Input can also be used for other purposes if for some reason the auto reclosing
shot needs to be halted.
TRSOTF
This is the signal "Trip by Switch Onto Fault". It is usually connected to the "switch onto fault" output
of line protection if multi-shot auto reclosing attempts are used. The input will start the shots two to
five.
Recommendations for output signals
Please see Figure
IPT1, IPT2, IPT3, IPT4 and IPT5
Indicates that auto reclosing shots one to five are in progress. The signals can be used as an
indication of progress or for own logic.
ABORTED
The ABORTED output indicates that the auto recloser is inhibited while it is in one of the following
internal states:
• inProgress: auto recloser is started and dead time is in progress
• reclaimTimeStarted: the circuit breaker closing command has started the reclaim timer
ACTIVE
Indicates that the auto recloser is active, from start until end of reclaim time.
BLOCKED
Indicates that auto recloser is temporarily or permanently blocked.
CLOSECB
Connect to a binary output for circuit breaker closing command.
COUNTT1, COUNTT2, COUNTT3, COUNTT4 and COUNTT5
Indicates the number of auto reclosing shots made for respective shot.
COUNTAR
Indicates the total number of auto reclosing shots made.
Railway application RER670
Application manual
80 and default factory configuration for examples.
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Section 12
Control
M12399-46 v9
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