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Section 15
Control
15.2.2.15
15.2.2.16
15.2.2.17
15.2.2.18
622
ARMode=1/2/3ph, is done from a hardware function key at the front of the IED, but
alternatively there can for example, be a physical selector switch on the front of the
panel which is connected to a binary to integer function block (BTIGAPC).
The connection example for selection of the auto reclosing mode is shown in
Figure 306.
IEC07000119 V3 EN-US
Figure 306:
Selection of the auto-reclose mode from a hardware functional key
in front of the IED
Auto reclosing reclaim timer
The tReclaim timer defines the time it takes from issue of the breaker closing
command, until the auto recloser resets. Should a new trip occur during this time, it
is treated as a continuation of the first fault. The reclaim timer is started when the
circuit breaker closing command is given.
Pulsing of the circuit breaker closing command and counter
The circuit breaker closing command, CLOSECB is given as a pulse with a
duration set by the tPulse setting. For circuit breakers without an anti-pumping
function, close pulse cutting can be used. It is selected by the CutPulse setting. In
case of a new start pulse (trip), the breaker closing command pulse is then cut
(interrupted). The minimum breaker closing command pulse length is always
50ms. At the issue of the breaker closing command, the appropriate auto recloser
operation counter is incremented. There is a counter for each type of auto reclosing
command and one for the total number of auto reclosing commands.
Transient fault
After the breaker closing command the reclaim timer keeps running for the set
tReclaim time. If no start (trip) occurs within this time, the auto recloser will reset.
The circuit breaker remains closed and the operating gear recharges. The
CBCLOSED and CBREADY input signals will be set.
Permanent fault and reclosing unsuccessful signal
If a new start occurs, and the number of auto reclosing shots is set to 1, and a new
START or TRSOTF input signal appears, after the circuit breaker closing command,
the UNSUCCL output (unsuccessful reclosing) is set high. The timer for the first
1MRK 506 369-UEN B
IEC14000040-1-en.vsd
Line distance protection REL670 2.2 IEC
Application manual
M12391-202 v4
M12391-205 v4
M12391-208 v4
M12391-211 v5
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