Surge Protection Device vs Surge Supression device.

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ptonsparky said:
What is the difference between SPD & SSD? (Surge Protection Device & Surge Supression Device) Where it is located? Meter or SE vs branch circuit protection?
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Surge Suppression, as in TVSS (Transient Voltage Surge Suppressor), is an older term. In 2009, UL 1449 (now called UL/ANSI 1449) dropped the term TVSS and required everyone to start using the term Surge Protection Device, but set up a system of different classifications (type 1, 2 or 3) of SPDs because people were misinterpreting the requirements.
 
Have any of you installed any of these devices lately? I have a customer inquiring about a whole house surge protector. I have seen a few around but never seen them in action or afterward. What has been anyone's luck with them?
 
jmellc said:
Have any of you installed any of these devices lately? I have a customer inquiring about a whole house surge protector. I have seen a few around but never seen them in action or afterward. What has been anyone's luck with them?
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I always install the whole house protection from SQUARE-D.

I have not seen one that I had to replace so I don't know what it looks like after it takes a surge. Or maybe it does see surges during the day but they are not large enough to actualy damage the SPD. I don't know. But FWIW, i have been very happy with SQUARE D product so i always install their SPD.
 
edward said:
I always install the whole house protection from SQUARE-D.

I have not seen one that I had to replace so I don't know what it looks like after it takes a surge. Or maybe it does see surges during the day but they are not large enough to actualy damage the SPD. I don't know. But FWIW, i have been very happy with SQUARE D product so i always install their SPD.
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Their's is breaker type, right? Only fits a SQ D panel? Or can it be mounted beside panel?
 
These devices can work if properly applied, in area that required them. We have on major aerospace customer who blew an average of 1 high power drive per month for 3 years. Although we enjoyed the repair business, I felt guilty and researched their storm lightning problems in GA and developed a 50,000 joule TVSS unit to put on 480v 3ph power input to the machines. For the last 3 years we have repaired about 3 drives. Guess SPD devices can work.
 
ptonsparky said:
What is the difference between SPD & SSD? (Surge Protection Device & Surge Supression Device) Where it is located? Meter or SE vs branch circuit protection?
Click to expand...

It just a play on wording both basicly meaning the samething, generally I like point of use devices over whole house protection because most surges are a high frequency event and putting the surge unit at the panel can mis many surges generated within the building, but it can be a good idea to use both if in a lightning prone area.

To save some typing see this thread on my responce to a member on the subject:

Bryant quadplex surge-suppressor outlets
 
We have 208v 3p Cutler-Hammer 100kA mounted next to the MDP's (we have 2 services) and they work well. And when we lost a phase during a storm last summer, the alarm in them notified us. Worth the money for sure.
 
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