Campground power is unpredictable. The Camco Power Defender plugs between the pedestal and your 50-amp shore cord, continuously monitoring incoming voltage and automatically cutting power before a surge, spike, or bad voltage condition reaches your air conditioner, refrigerator, or any other onboard appliance. When voltage stabilizes, it reconnects automatically -- no manual reset required.
Many campground pedestals deliver voltage that swings well outside the safe 102-132 VAC window -- sometimes due to heavy load on the grid, aging wiring, or a faulty breaker panel. Low voltage is especially dangerous: it forces motors and compressors to draw excess current, overheating windings and shortening equipment life. High voltage can destroy sensitive electronics instantly. The Power Defender monitors both conditions and trips in 8-10 seconds when voltage drifts out of range.
The built-in 140-second reconnect delay is a key feature for AC protection. It prevents the compressor from restarting under load immediately after a power event -- a common cause of compressor failure. Power is only restored once voltage has been stable long enough to confirm the problem has passed.
Trips in 8-10 seconds when voltage falls below 102 VAC or rises above 132 VAC. Reconnects automatically after 140 seconds of stable power -- no manual reset needed.
Multi-mode MOV surge suppression covers L1-G, L2-G, L1-L2, L1-N, and L2-N paths with a clamping voltage under 300 VAC and 6,500 amps per MOV peak spike current.
Detects reverse polarity and voltage-on-ground wiring faults at the pedestal before you connect your rig. Diagnostic indicator lights clearly identify the fault type.
Rated for outdoor use in wet campground conditions. Built-in handles on both ends make connecting and disconnecting the heavy 50-amp cord much easier.
Any 50-amp RV owner connecting to campground or RV park power should use a voltage protector. This is especially true for rigs with residential refrigerators, inverter/charger systems, variable-speed AC units, or large entertainment electronics -- all of which are sensitive to voltage swings that a standard surge protector will not catch. The Power Defender addresses both surge events and sustained voltage problems.
The 55306 uses a 2-mode suppression architecture with individual MOV paths across all combinations of line, neutral, and ground conductors. This matters on a 50-amp service because L1 and L2 are separate 120V legs -- a protector that only covers one leg leaves half your coach unprotected.
The Power Defender is a pass-through device. It plugs directly into the 50-amp campground pedestal receptacle, and your RV shore cord plugs into it. No wiring, no tools, no panel access. Unplug it and take it with you when you leave -- no hardware stays behind at the site.
Air conditioner compressors require pressure equalization time after shutdown before they can restart safely. If power is restored in just a few seconds after a trip, the compressor attempts to start against high head pressure and can fail. The 140-second delay gives the system time to equalize, protecting a component that is among the most expensive to replace in an RV.