Quote:
Originally Posted by onfire
The standard surge protector (at least on new homes in Moultrie Creek) is an Eaton BRNSURGE which has an 18kA surge current rating, the common aftermarket unit is an Eaton CHSPT2ULTRA which has a 72kA rating and the SECO device (a Meter-Treater M-Ti 400) is rated at 120kA (60kA per phase). Surge ratings are typically "one-time" meaning after that it will need to be replaced.
The discharge rating is 3kA, 10kA and 20kA respectively. They all have indicator lights to show if they are working or not, a spike/surge greater below the discharge rating should not cause permanent damage to the unit, but after repeated surges they degrade and will eventually fail.
Generally the larger the discharge / surge rating, the slower the reaction time and less clamping of smaller voltage spikes, that is why multiple stages of protection are necessary.
As an example, the SECO unit is good protection for your AC compressor and blower motor, but offers little protection for the capacitors or circuit board in your HVAC.
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Thanks for the info!
Adding the Eaton BRNSURGE is a relatively low cost device that installs with the circuit breakers.
Status can be viewed by opening the door on the breaker panel.
https://a.co/d/74P2a01