ABB REF615 Applications Manual page 58

Section 3
REF615 variants
52
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 some selected protection functions are connected to this input. A
control command to the circuit breaker, either local or remote, also blocks the
autoreclose function via the CBXCBR-selected signal.
The circuit breaker availability for the autoreclosure sequence is expressed with the
binary input 4 (X110:6-7) by connecting the input signal to the CB_RDY input. In
case this signal is completely removed from the autoreclose function block with SMT,
the function assumes that the breaker is available all the time.
The autoreclose sequence in progress indication is connected to the alarm LED 11.
1MRS756378 D
REF615
Application Manual