Why whole house surge protectors are not enough


TL;DR:

One measure of a surge protector is the clamping voltage. That is, at what voltage does the surge protector actually start to work. Whole house surge protectors are limited to no less than ~ 600 Volts (instantaneous) between a leg and neutral or ground. That’s up to 1,200V if symmetrical.

The best surge protecting strips and conditioners clamp below 200 Volts.

Please keep this in mind when deciding whether or not to use surge protectors at your PC, stereo, TV, etc. in addition to a whole house unit.

I wrote more about this here:

 

https://inatinear.blogspot.com/2021/09/time-for-new-surge-suppression.html

No manufacturer of whole house surge protection claims that their devices alone are enough for sensitive electronics when you check the fine print.

erik_squires

Showing 5 responses by vinylshadow

Isn't it so that depending on their specs, MOV's can "clip" those occasional transient peaks of current to your amps so your speakers can not express those flash cymbal crashes for example. 

That's the reason that I pulled my Richard Gray MOV power conditioner out from my system and placed a Seimens Pro 140 at the circuit breakers. I'm in S Florida so it's a risk but I don't want any MOV's by my equipment. I think the Shunyata designer feels the same. 

I have a tricked out PI Audio UBER Buss power conditioner though. 

@audioman58 

Is this the Seimens that you have? 

Siemens FS140 Whole House Surge Protection.

It's the one I have. I've read it's the best whole house one available. Unsure of its clamping voltage...I had a Richard Gray 1200S at my stereo rack but pulled it as it limits transient voltage peaks to my amps which effects the music quality and went whole house protection. . 

Sorry, current. My Gray was an old model from 2008. The Gray had chokes. Chokes compress dynamics I've been told. 

I have a 30A dedicated line connected to my Uber Buss power conditioner with a 30A Neutrik connector.

My UBER Buss does a better job with noise than the Gray. Power Factor Correction of 1 if memory serves me.

Caelin Gabriel of Shunyata advises the whole house surge suppressor at the breaker box, and no suppressor at the equipment rack and Garth Powell of Audioquest feels strongly for the opposite due to potential RF noise.

No I won't find any chokes. The designer ran through everything with me. Please don't comment on something you know nothing about. 😁