1. General Description
The DFA remote actuator is a retro-fittable motor-driven remote control device for residual current
circuit-breakers in the DFS-2 and DFS-4 product ranges. It is thus possible to connect or disconnect
residual current circuit-breakers as well as to trip RCCBs from a remote location.
The current switching position of the activated RCCBs can be signalled using relay switching contacts
that are integrated in situ. In each case there is a normally open contact with a shared common pole
available for the possible positions "connected, "tripped" and "disconnected".
The DFA can be de-activated with the aid of the rotary switch on the enclosure cover, so that it cannot
be accidentally activated from a remote location, e. g. during maintenance work at the distribution
board. The DFA may optionally also be operated in automatic mode, whereby 15 seconds after a trip
occurs the automatic reconnection is carried out.
Note: According to the standard DIN VDE 0100-530, automatic reconnection is only permitted in areas
that can only be accessed by persons who have electrical training and trained electrical technicians.
The relevant operating status of the remote actuator is indicated by a green LED on the enclosure
cover.
2. Installation and Commissioning the DFA
Installation may only be carried out by an authorized, trained electrical technician.
For mounting the DFA remote actuator the latter is placed to the left, and next to, the residual current
circuit breaker. The two devices are then pushed together so that the toggle of the residual current
circuit breaker is encompassed by the drive actuator of the DFA and both devices are securely snapped
together by the two snap-on clips.
clip
Actuator
Toggle
clip
DFA 2
Doepke
16
