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PC Type Dual Power Automatic Transfer Switch(ATS) ---
1.PC Type,Internally composed of electromagnetic relays, coils, circuit boards, rectifiers, and limit switches.
2.Dual Power Automatic Transfer Switch,it means there are two power source need to be connected,can not be 3 or 4.
3.Two power source,we call them normal power (N) and reserve power (R).Normal Power usually is city power, Reserve Power can be city power or generator ,just make sure the input voltage should be 220V. And inverter can not be reserve power,if you need a PV ATS,we also produce it.
Wire Diagram
Easy wiring,please wiring the ATS according to this wiring diagram, if there is no power, please check the green terminal side,maybe the screws are not tightened properly.
Measurement
This ATS can be installed in pc electric box which need to be din rail mounted.
Manual-Auto Button
If you want it to work automatically,please make sure the button in "Auto" position.
If you want to transfer the power by your hand,please make the button in "Manual" position.
4 pcs Wires
The ATS will come with 4 wires for AR/AN BR/BN connecting.
Din Rail Mounted
Din Rail Mounted,can be installed in PC Electric Box.
Lloyd G. Standish
2025-08-18 18:59:11
I used this automatic transfer switch (referred to below as the ATS) to add UPS functionality to my solar electric system. Here's how:I have plenty of solar power during the day, but at night my two 100-amp batteries are not enough to power my devices through the night.There's a solar transfer switch that monitors the battery voltage and switches to grid power when the battery voltage drops too low. At night, in the absence of solar power, it just drains my batteries down to a set point (say, 50%) and switches over to grid power. After that, if the grid power fails, the solar transfer switch won't switch back to battery/inverter power. So without the ATS, I have no real protection against power failure at night.By adding the ATS together with a time switch ("Little Grey Box" at lower left in the photo), I can use my solar power during the day, and let the ATS automatically switch to grid power at night by having the time switch turn on the grid power. At night, if the grid power fails, the ATS automatically switches back to battery/inverter power until the grid power is restored. In the morning, the time switch turns off the grid power to the ATS, so it switches to battery/inverter, now powered by the solar panels.The ATS takes about 1 second to transfer. Since I use this to keep electronic equipment online, I also use a PC grade UPS to avoid power interruption, not visible in the photo.The ATS appears to be well-built. Furthermore, the seller is fast to respond to questions. I highly recommend this item.
russ
2025-07-18 13:24:53
Installed in my rv for a transfer switch and it works great. Auto function works perfectly and has manual operation as well
TECHnical
2025-07-07 18:16:01
I got this to use with solar, and also as a disconnect switch to activate when there is a storm coming. Documentation was lacking and after experimentation I found it works simply and will be useful. It's bigger than I expected.This switch would be useful for a solar installation using solar as main, and grid as reserve. Or for a backup generator you manually turn on during a power failure, with automatic (and safe) switchover once generator is turned on. Switching is fairly slow, so as others have said this won't substitute for a UPS. It replaces an interlocked set of breakers that you must switch by hand on a power event.Unit is fairly large. Decent quality plastic. Screw terminals are beefy. Manual knob turning has some resistance and won't be accidentally initiated. Unit can't be easily disasembled (I couldn't get cover to come off after releasing snaps on underside). Documentation is better ignored as it only confuses (calling main power N, which also refers to neutral, doesn't help). Following description is by trial-and-error.Unit has two separate two-pole switches, N (main power) and R (reserve power). Each separately connects and disconnects live and neutral for that side from back (input) to front (output); there is NO cross-connection between sides, which you must do (or not) on the output side. The center lever selects which side is switched on. In automatic mode, if main and reserve power are live, it rotates to N side. If only one one side has power (main OR reserve), it just rotates to that side. So you could keep solar/backup off and manually turn on inverter/generator on a power failure, and this will safely and automatically switch over to backup power (and switch back to main once it's restored). In manual mode it doesn't rotate switch, just shows status lights for power.Green block at bottom is apparently for indicator lights to put outside utility box, showing whether main or reserve power is selected and live. These output full line voltage. NOTE that neutral marking on left one (main) is WRONG. Pinout from left to right: main neutral, main live, reserve live, reserve neutral. You wouldn't be wiring lights with a common neutral anyway but this might bite you (note that the live sides are NOT connected directly to live, since only one is active at a time to indicate which side is turned on).For my use as a more secure grid disconnect over a simple switch, I wire AC to reserve side, and have a smart plug driving main power side. Then my load is ONLY connected to main power side. This way when I turn smart plug off (remotely), unit switches off main power and over to reserve. But reserve outputs aren't connected, so this disconnects both live and neutral of my load with hefty internal switches, probably better than tiny relay in smart plug.
Randy E Jackson
2025-06-01 16:24:37
Takes a lot of guess work out of your project's
No vino para soporte
2025-02-24 18:43:16
No me agradó que no vino para soporte en pared.
Freddy Gonzalez
2025-01-02 19:10:03
Al hacer el cambio, a veces como que se traba y hace titilar o parpadear las luces, ya que no logra hacer el cambio hasta después de 3 segundos
ElectroResearch
2024-11-16 18:23:08
I spent a large part of my professional life working as an electrician for a major transportation authority. Part of my speciality was installing emergency power systems for use in power failures. I spent many years installing, programming, and servicing automatic transfer switches. Although complicated in their design, they are simple in operation. When your normal power source fails the load is transferred via your automatic transfer switch to your emergency power source. And then back again when your normal source is restored.This particular switch has a great price and decent specifications. Installation and setup is fairly simple. There are additional contacts that can be used for most anything, as long as that anything doesn’t require current that is above the contacts rating. Want to know you’re on emergency power? Use the auxiliary contacts to turn on a remote indicator light. You’re limited to 63 amps on the main contacts.As long as the specifications work for you I’d recommend this automatic transfer switch.
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