Voluntary Transfer Mode

The voluntary transfer mode is equivalent to auto-priority mode on one source, with forced priority to the SI or SII source. It is activated when associated input is closed (The commercial reference number for the voluntary remote control module is TPCDIO08). It takes over 200 ms to active the voluntary mode. The signal for voluntary transfer should be constant.

Voluntary transfer is normally used for special tariffs. Once the mode is set from voluntary to N or A, ATSE is still remains in auto mode. When there is power contingency on target source, transfer switch can re-transfer to available source automatically.

NOTE: Auto transfer will not be active, if transfer action damages driving system (for example, both sources are out of range, TSE refuses to transfer) .

The following are the voluntary transfer mode use cases:

Use Case 1: Typhon Mode

During typhoon or earthquake, the Genset will be more stable than utility. The user for this case has installed a typhoon mode switch on his control panel. The user will activate the typhoon mode switch. It is connected to the input voluntary transfer mode which will transfer to alternate source (need accessory to have function of voluntary transfer using TPCDIO08 accessories). The ATSE will now activate the Genset output and will transfer to Genset once ready.

Now during the typhoon, the Genset is flooded. The ATSE will still be in auto mode. It detects alternate source failure. If the normal source is fine, it will try to transfer to normal source (voluntary is still an auto mode, and we have auto-return). If the normal source is not available then ATSE will not do any transfer.

Still during typhoon, the Genset can restart (it was a fuel level problem). As the typhoon mode switch is still enabled, the ATSE will transfer back to the Genset. The Genset output keeps activate.

So, whatever the source is connected, the typhoon is gone. The utility is back to normal. The user will deactivate the typhoon mode switch. The ATSE will be transfer back to normal source at auto mode with auto-return, U-G.

The configuration needed is a ATSE along with voluntary transfer module. With this configuration, the user don’t need to play with any ATSE settings (return mode, priority source, what is the normal source).

Use Case 2: Peak Tariff (Align with Controller UA/BA)

Initially this feature was created in UA BA in France for Special Tariff Fare (STF) capability. Special Tariff Fare (STF) in France is a special electricity pricing that allows to have discount price on low consumption hours, with the drawback of having a very expensive kWh price on peak hours. With this option, EDF (French utility) provides an output on the energy meter to warn the end user about the price increase. This output is wired on the voluntary transfer input of the controller, which automatically transfers the load to a cheaper alternate source. This allows to help shedding the peaks on the network.

Transfer Logic of Voluntary to A (U-U Application)

T11 is internal fixed time delay

Transfer Logic of Voluntary to N (U-U Application)

T11 is internal fixed time delay

Transfer Logic of Voluntary to A (U-G Application)

T11 is internal fixed time delay

Transfer Logic of Voluntary to N (U-G Application)

T11 is internal fixed time delay