Control functions are designed for the control of up to 3 electrically operated switchgear units equipped with electrical check-back signaling.

For the control of switchgear units either the binary inputs or the optional communication interface or the function keys of the local control panel can be used.

Up to 12 operation signals can be acquired though binary signal inputs and they are processed according to their primary significance (e.g. CB readiness). Each binary signal input for signals from switchgear and single-pole operations can have the debouncing and chatter suppression from three groups assigned, for which the debouncing and chatter time can be individually set.

For the acquisition of binary counters, up to four binary inputs may be configured. The contents of these counters are transmitted cyclically via the serial link. The counter values are stored so that they are not lost if the supply voltage should fail. Counting continues from the stored value as the initial value when the P632 restarts.

The P632 sends control signals only after it has checked the readiness and validity to carry out such commands, and it then monitors the operating time of the switchgear units. If the protection device detects that a switchgear unit has failed, it will signal this information (e.g. by configuration to a LED indicator).

Before a switching command is issued the interlocking logic on the P632 checks if this new switchgear status corresponds with the bay and station topology. The interlocking logic is stored in form of bay interlocking, with and without station interlocking, for each Bay Panel in the default setting. The interlocking conditions can be adapted to the actual bay and station topology. Interlocking display and operation correspond to the programmable logic.

When the P632 is included in a station control system the local interlocking can easily be integrated with the overall system interlocking.

When the P632 is not included in a station control system then bay interlocking is applied without station interlocking.

If the bay and station topology are found to be valid the switching command is issued. If a non-permissible status would result from the switching action then the issuing of such a switching command is refused and an alarm is issued.

If not all binary outputs are required by the bay type then these vacant binary outputs can be freely utilized for other purposes.

Besides issuing switching commands binary outputs may also be triggered by persistent commands.