devices for surge protection

MEX, why does your picture show 4 MOVs? IIRC and that was 20-30 years ago, I thought I used three to bridge the three sets of wires. why the 4th?
bumpy

Almot wrote:


Or is there anything for $250 that does correction down (i.e. surge protection), and boost, and spikes?

yes, delayed restart to save compressor after shutdown, mis wiring issues, over/under voltage shut off, etc.
that Is why I think all of these recommendations should be for a multi-function surge protector, not a $90 special.
bumpy

The circuit consists of three buss wires

LINE

Neutral

Earth Ground

240 connections need a second LINE (L2) buss but we won't go there.

This package serves best connected after the (closer to the rig) autotransformer voltage protection. If I had a high-end gaming PC desktop I sure as hell would protect it with an ISOLATION TRANSFORMER AHEAD OF THE UPS.

Now I gotta go and find out what puked on the Whiffco. Jim's Megawatt remains under the evil eye. I want to hear whimpers before ripping into it.

Hi Mex,

Yes, please. But with a wiring diagram for dummies in a parallel (not series) configuration (that would make it plug and play).

MEXICOWANDERER wrote:
If there is enough interest in this, I'll shop on eBay and post the seller links for the correct rated devices. REMEMBER minimum 4 devices except GDTs EACH buss. Four, L-N and four L-Ground 20 mm MOVs preferably 1500 watt TVSs. Six each would be better yet. Yes, fuses are vital for TVS circuit protection.

Almot,

The Sola bucks down about ten volts. Surge could be 20,000 volts.

The sola is fast at switching modes but true surge protection needs to be at the nanosecond level. I'm certain the Sola is NOT that fast.

The Sola would not prevent damage from an open neutral--because the voltage from such an event can be 170 volts or higher. Bucking on the Sola tops out at the 155 volt level lowering output to 139 volts but I would not want the output voltage to be that high--so the Sola is only "effective" to about 145 volts where it lowers output to 130 volts..

I've never seen high voltage at a campground, or anywhere else either.

The PI and SG units are quite simply BAD at surge suppression (MOV only) and poor at low voltage disconnect (too low a voltage), in my opinion.

The are good at high voltage disconnect.

Polarity, open neutral, and bad ground can be checked with a $5 device before you plug in.

They are good at time delay before reconnecting.

They do nothing to boost low voltage and that may be the #1 source of long term damage to the air conditioner motor.

Almot wrote:
How "surge suppression" is different from "bucking" that Sola does?

How "surge suppression" is different from "bucking" that Sola does?

And forget the piggly-wiggly symbol for an inductor. Useless added garbage for this exercise. Had to use it as the image had the fewest evil characterizations.

Almot,

The Sola does no surge suppression of any kind. That has to be added on.

The Hughes autoformer does have MOV surge included

Bumpyroad wrote:
the multi-function surge guards that do much more than detect surges. unfortunately some folks here buy the $90 version instead of the better $250 and up one.
bumpy

If "surge" is several seconds, then voltage corrector like Sola for $180 works as a "surge guard", plus boost, without spike suppression, right?

Or is there anything for $250 that does correction down (i.e. surge protection), and boost, and spikes?