Arcteq AQ-S215, Instruction Manual

Page: 155 / 289

The following figure presents a simplified function block diagram of the auto-recloser function.
Figure. 5.4.4 - 104. Simplified function block diagram of the auto-recloser function.
As the diagram above shows, the auto-recloser function is tied to and dependent on the block status
information and configuration of the object control and monitoring function. This is why the controlled
object must be configured before the auto-recloser function can be used. In AQ-2xx protection
systems the object control block supervises all breaker operations: this means that breaker-related
functionalitites (e.g. synchrocheck, breaker status monitoring) are not noted separately by the auto-
recloser function. If any of these fail during the circuit breaker opening or closing, the object control
function reports the event to the auto-recloser function which then takes the corresponding action.
In addition to the previously mentioned cases, the manual control of the breaker (whether open or
close during the auto-recloser sequence) also always causes a reset of the auto-recloser. For example,
if a breaker is closed manually during dead time towards a fault, the auto-recloser function enters the
general reclaim mode and causes a lock-out of the function.
The auto-recloser function gives exhaustive information about its operations and statuses through
online indications, events, registered data as well as output signals which can be configured to any
output or logical input in the device. If the network configuration is altered during an auto-reclosing
sequence, the operation of the auto-recloser function can also be modified accordingly by switching to
a setting group that matches the changed network situation.
Input signals of the auto-recloser function
The required auto-recloser scheme determines how many and which setting parameters are needed.
All status changes in the input signals (inc. the requests) always cause recorded events, also in the
object's registers and the object's continuous status indications. Events can be enabled or disabled
according to the application requirements.
A AQ Q-S215 -S215
Instruction manual
Version: 2.04
154