Noise Suppression

Much more information is needed for a complete answer. A "Furman" line cond itioner with the capacity to handle a motor load will cost well in excess o f a new refrigerator that will not have this issue. If the motor-start cap acitor is failing, same issue as these are often sealed units. Applicable o nly to North America, of course.

So, where/what/age/brand/what is tripping, and how?

Otherwise, look up "true RMS line conditioner".

Peter Wieck Melrose Park, PA

You may try something like this :

3300-joules~ISOBAR6

Hook it to the refrigerator to start with and if you still get devices tripping, put it on the devices.

Are you sure it is a spike or is it possiable the refrigerator is drawing enough current to drop the voltage ? A friend had a loose neutral on his power line. One side would have low voltage and the other would have high voltage. He had to get the power company to correct it.

Ralph:

A surge protector has only limited effectiveness on "outgoing" surges. Not none, limited.

Peter Wieck Melrose Park, PA

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** That is extremely unusual - the fridge MUST be faulty.

** Now you change your story ?

A burst of "noise " is not a voltage drop that can trigger things. If the thermostat switch has no RC snubber, there is a burst RF noise that can make its way into audio gear as a click or a brief flash or data loss on a TV screen.

IME no plug in device is effective against this.

You need to add or replace the missing/ faulty snubber.

BTW:

Diagnosing your own problem and its cure is not welcome here.

Just describe the problem in detail and leave the rest open.

..... Phil

domestic or large commercial?

That was my first thought - wiring issue.

Hook the fridge up to a surge protector.

Surge Protectors are designed to work on incoming power. Depending on the design, they are far less effective with outgoing surges. And, if you have, in fact, a drop in voltage due to a hard-start, the will have no effect at all.

Peter Wieck Melrose Park, PA

If it's the back EMF from the motor as I assume it will be, then it'll be a spike, not a surge, and that requires a different approach.

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It's more likely a spike from the motor current being suddenly shut-off. Remember motors are reactive components.

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A normal refrigerator motor turn-off doesn't have this effect. This is not normal, is most likely a wiring-in-the-walls fault. An electrician should check the power delivered.