ABB Relion 670 series - Auto Reclosing Operation off and on

• Evolving fault where the fault during the dead-time spreads to another phase. The
other two phases must then be tripped and a three phase dead-time and auto reclose
initiated
• Permanent fault
• Fault during three-phase dead time
• Auto recloser out of service or circuit breaker not ready for an auto reclosing cycle
“Prepare three-pole tripping” is then used to switch the tripping to three-pole. This signal
is generated by the auto-recloser and connected to the trip function block and also
connected outside the IED through IO when a common auto-recloser is provided for two
sub-systems. An alternative signal “Prepare 1 Pole tripping” is also provided and can be
used as an alternative when the autorecloser is shared with another subsystem. This
provides a fail safe connection so that even a failure in the IED with the auto-recloser will
mean that the other sub-system will start a three-pole trip.
A permanent fault will cause the line protection to trip again when it recloses in an attempt
to energize the line.
The auto reclosing function allows a number of parameters to be adjusted.
Examples:
• number of auto reclosing shots
• auto reclosing program
• auto reclosing dead times for each shot
15.2.2.1 Auto reclosing operation Off and On
Operation of the automatic recloser can be set to Off and On by a setting parameter or by
external control. The setting parameter Operation = Disabled, or Enabled sets the
function to Off or On. With the settings Operation = Enabled and ExternalCtrl =
Enabled , the control is made by input signal pulses to the inputs On and Off, for example,
from a control system or by a control switch.
When the auto recloser is set On, the SETON output is set, and the auto recloser becomes
operative if other conditions such as circuit breaker is closed and circuit breaker is ready
are also fulfilled, the READY output is activated (high). Then the auto recloser is ready to
accept a start.
15.2.2.2 Initiate auto reclosing and conditions for start of a reclosing cycle
The usual way to start an auto reclosing cycle, or sequence, is to start it at selective tripping
by line protection by applying a signal to the RI input. Starting signals can be either,
general trip signals or, only the conditions for differential, distance protection zone 1 and
1MRK 506 369-UUS - Section 15
Control
Line distance protection REL670 2.2 ANSI 657
Application manual