Surge Protectors
in [Repair]
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From: vjp2.at on 26 May 2010 05:09 Are surge protectors based on grounding or diode clipping? - = - Vasos Panagiotopoulos, Columbia'81+, Reagan, Mozart, Pindus, BioStrategist http://www.panix.com/~vjp2/vasos.htm ---{Nothing herein constitutes advice. Everything fully disclaimed.}--- [Homeland Security means private firearms not lazy obstructive guards] [Urb sprawl confounds terror] [Phooey on GUI: Windows for subprime Bimbos]
From: Jim Yanik on 26 May 2010 09:04 vjp2.at(a)at.BioStrategist.dot.dot.com wrote in news:htioft$8nr$2(a)reader1.panix.com: > Are surge protectors based on grounding or diode clipping? grounding. once the breakover voltage is reached,the surge is conducted to ground. Otherwise,the surge would just find it's own way to ground,through your device,catastrophically. and you have to have a good ground,as grounds can float above true ground,particularly in poor soils,like Florida's sandy soil. -- Jim Yanik jyanik at localnet dot com
From: whit3rd on 26 May 2010 13:54 On May 26, 2:09 am, vjp2...(a)at.BioStrategist.dot.dot.com wrote: > Are surge protectors based on grounding or diode clipping? Both. Most surge suppressors have a conducts-on-overvoltage element directly across the line, with a fuse or circuit breaker to keep the fire hazard low. Additional elements that connect to the protective ground pin are of secondary importance. The conducts-on-overvoltage element is usually a metal oxide varistor, a kind of crude semiconductor breakover diode.
From: vjp2.at on 26 May 2010 22:18 Thanks for both replies. - = - Vasos Panagiotopoulos, Columbia'81+, Reagan, Mozart, Pindus, BioStrategist http://www.panix.com/~vjp2/vasos.htm ---{Nothing herein constitutes advice. Everything fully disclaimed.}--- [Homeland Security means private firearms not lazy obstructive guards] [Urb sprawl confounds terror] [Phooey on GUI: Windows for subprime Bimbos]
From: GregS on 27 May 2010 09:19
In article <f026ebce-f1d8-4dc2-83f3-4847ef4dcf64(a)o12g2000vba.googlegroups.com>, whit3rd <whit3rd(a)gmail.com> wrote: >On May 26, 2:09=A0am, vjp2...(a)at.BioStrategist.dot.dot.com wrote: >> Are surge protectors based on grounding or diode clipping? > >Both. Most surge suppressors have a conducts-on-overvoltage >element directly across the line, with a fuse or circuit breaker to >keep the fire hazard low. Additional elements that connect to the >protective ground pin are of secondary importance. I would argue that. The differential surpressor is fine, but the common mode surge can do more harm and a lot of noise problems. Using an isolation transformer makes common mode problems impossible. Its a direct short to ground. greg >The conducts-on-overvoltage element is usually a metal oxide >varistor, a kind of crude semiconductor breakover diode. |