Counters - ABB RED615 Technical Manual

Section 9
Control functions
9.4.5
708
If the Manual close mode setting is set to FALSE and the circuit
breaker has been manually closed during an auto-reclose shot, the
AR unit goes to an immediate lockout.
If the Manual close mode setting is set to TRUE and the circuit
breaker has been manually closed during an auto-reclose shot (the
INPRO is active), the shot is considered as completed.
When SOTF starts, reclaim time is restarted, provided that it is
running.
The frequent-operation counter is intended for blocking the auto-reclose function in
cases where the fault causes repetitive auto-reclose sequences during a short period
of time. For instance, if a tree causes a short circuit and, as a result, there are auto-
reclose shots within a few minutes interval during a stormy night. These types of
faults can easily damage the circuit breaker if the AR function is not locked by a
frequent-operation counter.
The frequent-operation counter has three settings:
• Frq Op counter limit
• Frq Op counter time
• Frq Op recovery time
The Frq Op counter limit setting defines the number of reclose attempts that are
allowed during the time defined with the Frq Op counter time setting. If the set
value is reached within a pre-defined period defined with the Frq Op counter time
setting, the AR function goes to lockout when a new shot begins, provided that the
counter is still above the set limit. The lockout is released after the recovery time
has elapsed. The recovery time can be defined with the Frq Op recovery time setting .
If the circuit breaker is manually closed during the recovery time, the reclaim time
is activated after the recovery timer has elapsed.

Counters

The AR function contains six counters. Their values are stored in a semi-retain
memory. The counters are increased at the rising edge of the reclose command.
The counters count the following situations:
• COUNTER: counts every reclose command activation
• CNT_SHOT1: counts reclose commands that are executed from shot 1
• CNT_SHOT2: counts reclose commands that are executed from shot 2
1YHT530004D05 D
615 series
Technical Manual