Joules - surge protector question
I see surge protectors with differing values for joules.... but it doesn't say what is better ... is higher better than lower values ? thanks
Forum Discussion
There is "apparent" then there is reality. The "official" printed number for CFE power and Mexican registered (NOM) power devices is 127 vac 60Hz.
127
254
508
No way on the face of the earth are Mexico-bound appliances any different than USA appliances other than language tags. NOM is a trade law gimmick used to sanction illegal importation of less expensive electrical merchandise.
In Mulege Baja California Sur 30-years ago living on Ice House Rd. I was measuring 560+ volt 12 millisecond transients when the 150 horsepower ammonia compressor motor started and stopped. On a 127 volt line. Fluorescent lamp ballasts failed almost immediately. When a phase goes offline to my place it causes a ringing of several seconds before a breaker trips and relay shunts to ground. The first harmonic is in excess of 800vac on the remaining pair of conductors. You would think the transmission to distribution transmission step down would isolate this. I have a fresh set of Panasonic caps for the Sola line tamer upon my return. My refrigerator in my kid's restaurant has a 700va Sola protecting it.
I am grumbling. Thinking how nice a bi-directional 100-amp avalanche rectifier would be. 155,000 1/4 wave amp capacity. Absurd. Six hundred dollars.
I've been thinking about making a modular TVS board strictly plug in components. TVS and MOVs on modules. Half dozen modules per unit. CFE has 890 Mw of generation capacity at Lazaro Cardenas. So this is like unzipping for a forest fire.
127
254
508
No way on the face of the earth are Mexico-bound appliances any different than USA appliances other than language tags. NOM is a trade law gimmick used to sanction illegal importation of less expensive electrical merchandise.
In Mulege Baja California Sur 30-years ago living on Ice House Rd. I was measuring 560+ volt 12 millisecond transients when the 150 horsepower ammonia compressor motor started and stopped. On a 127 volt line. Fluorescent lamp ballasts failed almost immediately. When a phase goes offline to my place it causes a ringing of several seconds before a breaker trips and relay shunts to ground. The first harmonic is in excess of 800vac on the remaining pair of conductors. You would think the transmission to distribution transmission step down would isolate this. I have a fresh set of Panasonic caps for the Sola line tamer upon my return. My refrigerator in my kid's restaurant has a 700va Sola protecting it.
I am grumbling. Thinking how nice a bi-directional 100-amp avalanche rectifier would be. 155,000 1/4 wave amp capacity. Absurd. Six hundred dollars.
I've been thinking about making a modular TVS board strictly plug in components. TVS and MOVs on modules. Half dozen modules per unit. CFE has 890 Mw of generation capacity at Lazaro Cardenas. So this is like unzipping for a forest fire.
