F-ATI and F-ARI are RCCBs with an automatic uninterruptible test function. Depending on the application, RCCBs should be tested at least every six months. This ensures that the contacts are functioning properly and that the device is tripped in the event of a fault current to earth. Regular testing of RCCBs affects the uninterrupted operation of the downstream circuits and involves a great deal of work. This work is eliminated when using F-ATI and F-ARI. These RCCBs carry out the regular tests automatically and without interrupting the system. Operation by maintenance personnel can therefore be reduced to a minimum.
In addition to the automatic tests, the F-ARI series is equipped with an automatic reclosing unit to close the RCCB again after it has been tripped. This is specially designed for areas to which only electrically trained persons or qualified electricians have access. Reclosing is carried out based on an insulation test to ensure that there is not a permanent fault.
The results of all circuits are also collected via the ARBus interface.