Blocking Of The Autorecloser - ABB REC650 Applications Manual

Section 10
Control
10.2.2.4
10.2.2.5
10.2.2.6
10.2.2.7
10.2.2.8
202
reclosing for all manual trip operations. Typically CBAuxContType=NormClosed is also
set and a CB auxiliary contact of type NC (normally closed, 52b) is connected to inputs
52a and RI. When the signal changes from "CB closed" to "CB open" an auto-reclosing
start pulse is generated and latched in the function, subject to the usual checks. Then the
reclosing sequence continues as usual. One needs to connect signals from manual tripping
and other functions, which shall prevent reclosing, to the input INHIBIT.

Blocking of the autorecloser

Auto-Reclose attempts are expected to take place only in the event of transient faults on
the own line. The Auto-Recloser must be blocked for the following conditions:
• Tripping from Delayed Distance protection zones
• Tripping from Back-up protection functions
• Tripping from Breaker failure function
• Intertrip received from remote end Breaker failure function
• Busbar protection tripping
Depending of the starting principle (General Trip or only Instantaneous trip) adopted
above the delayed and back-up zones might not be required. Breaker failure local and
remote must however always be connected.
Control of the auto-reclosing open time
There are settings for the three-phase auto-reclosing open time, t1 3Ph to t5 3Ph.
Long trip signal
In normal circumstances the trip command resets quickly because of fault clearance. The
user can set a maximum trip pulse duration tTrip. A long trip signal interrupts the reclosing
sequence in the same way as a signal to input INHIBIT.
Maximum number of reclosing shots
The maximum number of reclosing shots in an auto-reclosing cycle is selected by the
setting parameter NoOfShots.
3-phase reclosing, one to five shots according to setting NoOfShots.
A trip operation is made as a three-phase trip at all types of fault. The reclosing is as a
three-phase. Here, the auto-reclosing function is assumed to be "On" and "Ready". The
breaker is closed and the operation gear ready (operating energy stored). Input RI is
1MRK 511 286-UUS A
Application manual