Double Power Supplies Wcq2g Automatic Intelligent Type Changeover Switch 50Hz 400V Transfer Switch

It is rated for AC 50 Hz and 400 V nominal operation, with current ratings covering the WCQ2G range from 16 A upward. These ratings match standard low-voltage distribution networks for automatic dual-source transfer.

Mount it on a DIN rail or panel within a suitable enclosure, connect the main source to the preferred input, the backup/generator to the alternate input, and the load to the output terminals. Then connect the control power and, where required, the generator start/stop and remote signaling wires, following the terminal diagram.

Choose the automatic ATS when you need unattended continuity, remote monitoring, or generator auto-start. A manual changeover is cheaper and simpler but requires a person on site for every transfer. For critical loads and off-hours outages, the automatic ATS is the standard choice.

The controller monitors both sources; on preferred-source failure it starts the generator, waits for stable voltage/frequency, and transfers the load. On mains restoration it waits out the retransfer delay, switches back, and then stops the generator after a cool-down.

The WCQ2G series covers rated operational currents from about 16 A up to the series maximum (up to 630 A and higher frame sizes in the family). This lets you match the switch to the full-load current of the protected distribution board.

A relay contact output starts the generator on main loss, and an adjustable warm-up delay ensures the set is stable before transfer. An adjustable retransfer delay prevents switching back during momentary mains flicker, followed by a generator cool-down stop.

The device includes both mechanical and electrical interlocks enforcing a break-before-make sequence, so the main and backup sources can never be paralleled. This protects the generator, utility connection, and downstream equipment.

It is used in hospitals, malls, airports, factories, and residential communities as the automatic changeover element between utility and emergency generators, typically at the main or essential-load distribution panel.

It conforms to IEC/EN 60947-6-1 and GB/T 14048.11 for transfer switching equipment, confirming its rated short-time withstand, interlock, and endurance characteristics.

During commissioning, verify source polarity and voltages, set transfer/retransfer delays, and run a simulated failure to confirm the transfer and generator start sequence. Thereafter, exercise the mechanism quarterly, retorque terminals, and retest the interlocks and alarms annually.