12.2.2.13 Thermal overload protection holding the auto recloser back
M12391-226 v3
If the THOLHOLD input (thermal overload protection holding auto reclosing back)
is activated, it will keep the auto recloser on a hold until it is reset. There may thus
be a considerable delay between start of the auto recloser and the breaker closing
command to the circuit breaker. An external logic limiting the time and sending an
inhibit to the INHIBIT
input can be used. The input can also be used to set the auto
recloser on hold for a longer or shorter period.
12.2.3 Setting guidelines
IP14929-1 v1
12.2.3.1 Configuration
M12399-3 v3
Use the PCM600 configuration tool to configure signals.
Auto recloser function parameters are set via the local HMI or Parameter Setting
Tool (PST). Parameter Setting Tool is a part of PCM600.
Recommendations for input signals
M12399-7 v10
Please see Figure
73 and default factory configuration for examples.
BLKOFF
Used to unblock the auto recloser when it has been blocked due to activating
BLKON input or by an unsuccessful auto reclosing attempt if the BlockByUnsucCl
setting is set to On.
BLKON
Used to block the auto recloser, for example, when certain special service
conditions arise. When used, blocking must be reset with BLKOFF
.
CBCLOSED and CBREADY
These binary inputs should pick-up information from the circuit breaker. At three
operating gears in the circuit breaker (single pole operated circuit breakers) the
connection should be “All poles closed” (series connection of the NO contacts) or
“At least one pole open” (parallel connection of NC contacts). The CBREADY is a
signal meaning that the circuit breaker is ready for an auto reclosing operation,
either Close-Open (CO), or Open-Close-Open (OCO). If the available signal is of
type “circuit breaker not charged” or “not ready”, an inverter can be inserted in
front of the CBREADY input.
INHIBIT
To this input shall be connected signals that interrupt an auto reclosing cycle or
prevent a start from being accepted. Such signals can come from protection for a
line connected shunt reactor, from transfer trip receive, from back-up protection
functions, busbar protection trip or from breaker failure protection. When the
circuit breaker open position is set to start the auto recloser, then manual opening
must also be connected here. The inhibit is often a combination of signals from
Section 12 1MRK 506 375-UEN A
Control
230 Railway application RER670 2.2 IEC
Application manual
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