ABB REC670 Applications Manual page 344

Section 14
Control
338
PLCLOST
This is intended for line protection permissive signal channel lost (fail) for example,
PLC= Power Line Carrier failure. It can be connected, when it is required to prolong
the auto reclosing dead time when communication is not working, that is, one line end
might trip with a zone2 delay. If this is used the auto recloser must also be started from
zone2 time delayed trip.
RESET
Used to reset the auto recloser to start conditions. Possible hold by thermal overload
protection will be reset. Circuit breaker position will be checked and time settings will
be restarted with their set times.
RSTCOUNT
There is a counter for each type of auto reclosing and one for the total number of
circuit breaker close commands issued. All counters are reset with the RSTCOUNT
input or by an IEC 61850 command.
SKIPHS
The high-speed auto reclosing sequence can be skipped and be replaced by normal auto
reclosing sequence by activating SKIPHS input before the STARTHS high-speed start
input is activated. The replacement is done for the 1st shot.
RI
The START input should be connected to the trip function (SMPPTRC) output, which
starts the auto recloser for 1/2/3-phase operation. It can also be connected to a binary
input for start from an external contact. A logical OR-gate can be used to combine the
number of start sources.
If StartByCBOpen is used, the circuit breaker open condition shall also
be connected to the RI input.
RI_HS, Initiate 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 3PhHS. High-speed reclosing shot 1
started by this input is without a synchronization check.
SYNC
This input is connected to the internal synchronism check 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.
1MRK 511 401-UUS A
Bay control REC670 2.2 ANSI
Application manual