ABB Relion 670 Series Technical Reference Manual page 640

Section 12
Control
12.2.2.2
12.2.2.3
12.2.2.4
634
Auto-reclosing operation
Operation of the automatic reclosing can be set to Off or On via the setting parameters
and through external control. With the setting Operation = Enabled, the function is
activated while with the setting Operation = Disabled the function is deactivated. With
the setting Operation = External ctrl, the activation/deactivation is made by input
signal pulses, for example, from a control system.
When the function is set Enabled and is operative the output SETON is activated
(high). Other input conditions such as 52a and CBREADY must also be fulfilled. At
this point the automatic recloser is prepared to start the reclosing cycle and the output
signal READY on the SMBRREC (79) function block is activated (high).
Auto-reclosing mode selection
The Auto-reclosing mode is selected with setting ARMode = 3phase(0), 1/2/3ph(1),
1/2ph(2), 1ph+1*2ph(3), 1/2ph+1*3ph(4), 1ph+1*2/3ph(5). The selected mode can be
read as integer as per above list on output MODE.
As an alternative to setting the mode can be selected by connecting an integer, for
example from function block B16I to input MODEINT.
Following integers shall be used: 1=3phase, 2=1/2/3ph, 3=1/2ph, 4=1ph+1*2ph,
5=1/2ph+1*3ph or 6=1ph+1*2/3ph.
When INTZERO from Fixed signal function block is connected to the input
MODEINT the parameter setting selected will be valid.
Initiate auto-reclosing and conditions for initiation of a reclosing cycle
The usual way in which to initiate a reclosing cycle, or sequence, is to initiate it when a
line protection tripping has occurred, by applying a signal to the RI input. It should be
necessary to adjust three-phase auto-reclosing open time, (dead time) for different
power system configurations or during tripping at different protection stages, the input
RI_HS (reclose initiation of high-speed reclosing) can also be used.
For a new auto-reclosing cycle to be started, a number of conditions need to be met.
They are linked to dedicated inputs. The inputs are:
• CBREADY: CB ready for a reclosing cycle, for example, charged operating gear
• 52a: to ensure that the CB was closed when the line fault occurred and initiation
was applied
• No blocking or inhibit signal shall be present.
Disabled and Enabled
1MRK505222-UUS C
Technical reference manual