Progressive International Dynamics PD52V 5200 Series Automatic Transfer Switch - 240 VAC, 50 Amp

I installed this unit in my Jayco Designer after the original Iota unit failed. Installation was straight forward and uneventful. During initial test run I noticed the relay made a solid thump when it closed. This was different from faint click that the old Iota unit made. Also noticed a faint a.c. hum when I was standing right next to it. The hum could not be heard inside the coach so no problem there. I like the fact that the unit is housed inside a steel box. The old Iota unit was in a plastic box and suffered major thermal damage when it failed. Overall, I think this is a quality transfer switch. The only negative I can see is the thump it will make in the middle of the night should the shoreline power fail.

Works perfectly. Exact replacement

Was an exact fit. Received when supposed to and saved our trip. All positive......

Transfer switch was exact one we replaces

Good quality unit, works as it should

This is my second Progressive Dynamics transfer switch. The first one failed in two year. It was the 52DCS model which utilized DC coils as a means of reducing hum or buzz. The shore power contactor began to bind and would not always connect. When I contacted Progressive Dynamics they informed me that that model was no longer produced (I understand why) but recommended this model. The price is reasonable, the box is metal, and thus far there is no buzz or hum from the unit. So, I'll give it 4 stars for that. Installation is fairly straightforward however the knockouts accommodate 1" clamps (not included) but many 50 amp supply cables are too thick to be secured properly by these size clamps. Bottom line: this is a no frills transfer switch. It works. Mine doesn't hum or buzz. I just hope Progressive Dynamics sourced better contactors for this model than they did for the 52DCS. Time will tell.

This has a slightly different foot print then my original 50amp ATS, so I was afraid it wouldn't fit. It is a bit taller and narrower then your typical ATS, but about the same total size. I ended up discarding the exterior screw tabs, and using the screw holes on the inside for a little extra clearance in my tight electrical compartment. Note - this does NOT come with wire clamps, so make sure you can re-use your old ones, or make a run to the hardware store to get new ones. I ended up using 3x1" - they were a different size then my originals.I also installed a (per the instructions) jumper on the board to remove the 30 second switch over, as I use this for an inverter, which worked perfectly. The jumper was not included, however the one on my spare furnace board worked perfectly.Other then that, no major issues, and NO HUMMING. The picture is rather poor, but hopefully shows the size difference between the original (left) and this one (right).

I lost all power to my RV I ordered this and delivery date was next day before 8 AM. The transfer switch was sitting on my doorstep that morning before 8 AM. This was an exact replacement all the mounting screws relays were in the exact same position. my motorhome is 12 years old.