ABB REF615 Applications Manual page 47

1MRS756378 D
REF615
Application Manual
A071322 V4 EN
Figure 12: Arc protection
ARC protection (ARCSARC1-3) and autoreclosing (DARREC1) are included as
optional functions.
The ARC protection offers individual function blocks for three ARC sensors that can
be connected to the IED. Each ARC protection function block has two different
operation modes, with or without the phase and residual current check. Operate
signals from the ARC protection function blocks are connected to the Master Trip
and also to the alarm LED 10 as a common operate indication.
The autorecloser is configured to be initiated by operate signals from a number of
protection stages through the INIT1-5 inputs. It is possible to create individual
autoreclose sequences for each input.
The autoreclose function can be blocked with the INHIBIT_RECL input. As a default,
the operation of selected protection functions are connected to this input. A control
Section 3
REF615 variants
41