Maximum Surge Current:6,500 Amps
Response Time:1 nanosecond
Spike Clamping Voltage:188 VAC peak @ 3,000 Amps
More effective protectors use L-N, L-G, and G-N protection. Furman only uses L-N. Does not matter. They are selling to people who have no idea if protection works. Furman’s near zero protection is hyped subjectively as 100% protection. Because eyes routinely glaze over with numbers. And fewer do not know what those numbers mean.
Second, if all 6500 amps go line to neutral, then at 188 volts, it can ’block’ or ’absorb’ a surge that is less than 32 joules. How does that ’block’ or ’absorb’ surges that are near zero - hundreds or a thousand joules? It doesn’t. They needed you to completely ignore or completely misunderstand numbers. Your numbers define protection as close to zero as possible without being zero protection. Just enough above zero to by hyped as 100% protection.
Third, if 6500 amps are incoming, then what is an outgoing path? It is electricity. Both an incoming and an outgoing path to earth must exist. Incoming on AC mains. At the exact same time, that current is outgoing via attached appliances. They market to consumers who forget how electricity works and how surges do damage. Incoming on AC mains. At the same time, outgoing destructively to earth.
Fourth, that L-N protection for a surge seeking earth ground means a surge incoming on a black (hot) wire now has two destructive paths into attached appliances. No problem for tiny 100 joule surges. Since surges that tiny are routinely converted by electronics into rock stable, low DC voltages to safely power semiconductors. Better protection is already inside electronics.
Thank you for providing numbers. Numbers demonstrate what does work, what are expensive scams, and what you did not understand. Furman protector does nothing for surges inside and hunting for earth ground destructively via appliances. Protection has always been about earthing a destructive transient BEFORE it can enter a building. Always - as was standard even over 100 years ago.
whart -
best time to install surge protection is when footings are poured. A protector is only as effective as its earth ground. Learn about Ufer grounds. Ufer originally pioneered this technology to protect munitions dumps from direct lightning strikes. Same protection is in telephone COs so that a $multi-million switching computer does not suffer damage during thunderstorms. COs typically suffer about 100 surges per storm. How often is your town without phone service for four days while they replace that computer? Why is service maintained during and after each storm? Learn about the most critical item in a surge protection *system* - earth ground. Telcos do not waste money on Furman type protection.
One example of how a radio station installed an Ufer ground and what is best protection for so little money:
http://scott-inc.com/html/ufer.htmMore information:
http://www.mikeholt.com/mojonewsarchive/GB-HTML/HTML/UferGroundPsi~20030930.htmEffective manufacturers who provide protectors from direct lighting strikes will not warranty protection. Best warranties are found on the least effective (and high profit) devices. Type is irrelevant. Type defines human safety parameters. For appliance protection, that protector must conduct at least 50,000 amps. Protection is never defined by a protector. Protection is defined by quality of and a low impedance (ie less than 10 foot) connection to single point earth ground. Ufer ground is an ideal example. Nobody will warranty what does the protection - earth ground.
That protector demonstrated by jea48 is rented from and installed by electric companies. Often a girl who reads meters might install it. Effective protection is that easy - but only if your earth ground both meets and exceeds code requirements.
