[Elecraft] [OT} Whole House Surge Protection

[David Gilbert]

Delta 3-phase systems are most definitely NOT compatible with Y-connect 
3-phase systems, so you are completely correct on that point.

One other point, though.   I'm pretty sure that any such surge 
protectors are not intended to be used for lightning protection ... just 
is case that is one of your motivations for installing one. The fine 
print on the whole house system offered by my electric utility 
specifically exempts lightning surges from protection.

73,
Dave   AB7E


On 1/31/2013 4:42 PM, Erik Basilier wrote:
> I am aware that the surge protected power strips I use are poor protection,
> because the shack uses more than one circuit from the panel, and I also have
> one power strip chained from another. The solution, I understand, is whole
> house surge protection located at the service entrance. I am currently very
> busy building a room addition to the house. This includes electrical
> installation work, and I had the idea of getting whole house surge
> protection installed at the same time.
>
>   
>
> Busy as I was, I didn't take enough time to make sure to buy the correct
> unit. My house has a kind of 3-phase system called "Split Phase High Leg
> Delta". This system adds a 3rd phase to the residential wiring that normally
> doesn't have it. The purpose in my case is for a 3-phase air conditioner.
> With this system, the 3rd leg coming into the panel has a higher voltage,
> 208 V, relative to the neutral. Not taking this into account I bought a
> protector Leviton 51120-3  that is designed for regular 3-phase wiring,
> which has only 120 V between each phase and neutral. I believe if I hooked
> it up to all 3 phases coming into the panel, it would fry the protector.
>
>   
>
> I have now identified another protector 32412-DS3 from Leviton that I
> believe is right for my application. It costs about $600 vs. only $225 for
> the one I bought. There is another difference. The one I bought includes a
> warranty not only for the device but also for a high dollar amount worth of
> electronics such as ham gear. The unit I should have bought has a warranty
> only for the device itself and not for connected electronics.
>
>   
>
> My questions for the group: Do you have whole house surge protection
> installed, especially with a high leg electrical system? If so, what
> particular device did you install? Is there any manufacturer out there that
> offers a protector for high leg installations with a warranty that covers
> connected electronics? Maybe at a price better than $600? I plan to put the
> unit I bought up for sale and hope to get $150 (never hooked up, still in
> shrinkwrap). However, another possibility comes to mind. The electrical
> service panel where I intend to install the new protector actually feeds
> another older panel inside the house that runs the older wiring, including
> most of the shack. Would it make sense to install the unit at the old panel
> instead of selling it? The benefit would be added protecton for ham
> equipment, but I see two reasons not to do it. First, this 3-phase protector
> would be wired up to only 2 phases at the old panel, and that means it would
> not be installed per the instructions, so that warranty of connected
> equipment  would be voided. Second, my linear and a few smaller ham devices
> are fed from a newer circuit from the main panel, bypassing the old panel. I
> concluded earlier that this situation will make the protection in the power
> strips useless. I also believe it would make a protector located at the old
> panel useless. So I am pretty sure I should sell the protector I bought. It
> is too late to return it to the vendor.
>
>   
>
> Thanks in advance for any advice.
>
>   
>
> 73,
>
> Erik K7TV
>
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