ABB REF 610 Technical Reference Manual page 30

REF 610
30
Feeder Protection Relay
Technical Reference Manual
As default, the AR function is not in use (number of auto-reclose shots = 0). The AR
function can be activated either via the HMI or with SPA parameter S25 by setting
the number of auto-reclose shots to 1, 2 or 3.
Shot 1
Shot Initiation
Shot 2
Shot 3
CB Close Inhibit
CB position closed
Fig. 4.1.4.8.-1 Simplified shot logic diagram
Shot initiation
The AR function can be initiated by any of the following signals:
• external AR initiation signal
• start signal from stages I> and I
• trip signal from stages I>, I>>, I
The start signal from stages I> and I
start delay for the respective stage. At the factory default delay of 300 s, the start
signal will, in practise, not be used for shot initiation. External AR initiation by the
digital input signal is selected in SGB.
Note!
Shot initiation by a start signal applies only to shot 1 and definite tripping.
Note!
The AR function will issue an opening command to the circuit breaker at shot
initiation by a start or a trip signal.
OR
Dead time
t
t
OR
t
CB closing time
OR
t
>
0
> and I >>
0 0
> will initiate a shot on expiration of a settable
0
1MRS 755310
S
Shot Due
R
AND
S
Close CB Command
R
CB Reclosing Failed
AND