wierd surge damage?

Had a wierd situation at a supermarket .
Power surge came in killed the FBII XL-4 ver 1 thats been there 12 years and
was on a breaker panel with surge protection built into it to protect the
comp. registers. took out a cable modem nothing else in store touched and
also failed open 2 door switches.
-- Normally switches fuse closed.
Never seen switches blown open before.
any one else ever see this.

Nick Markowitz Jr.
Owner
Markowitz Electric Protection
Private Industry Fire Investigator.
Qualified Electrical- Fire Alarm Contractor

Contributing Editor Pa. Firemans Magazine

Senior Correspondant www.1strespondernews.com
Contributor www.monyoughfire.com
www.nbfd.us
Contract Broadcast Engineer WAVL 910 AM apollo Pa.

----------------------------------------------------------------------------
----------------------
"To error is human to realy foul things up requires a computer"
----------------------------------------------------------------------------
----------------------
Irish Diplomacy

The ability to tell a man to go to hell and he tells you how much he is
looking forward to taking the trip.

----------------------------------------------------------------------------
----------------------------------------------------------------------------
----------
If a job is so simple a Monkey can do it The Monkey usally does a better job


.

Relevant Pages

  • Re: wierd surge damage?
    ... also failed open 2 door switches. ... Markowitz Electric Protection ... Qualified Electrical- Fire Alarm Contractor ... Contributing Editor Pa. ...
    (alt.security.alarms)
  • Re: http://h71000.www7.hp.com/?
    ... Two principles to first understand how switches are damaged. ... all switches already contain effective protection. ... then transient will find destructive paths via electronics. ... You had damage from a nearby strike (which is really more ...
    (comp.os.vms)
  • Re: li-poly battery protection for high cell count packs
    ... series paralell, and discharge in series. ... One complication is the readily available protection modules normally interpose ... N/4 series switches, all of which present a finite impedance, and which is sort ... Generally these switches can't be isolated from their driver ...
    (sci.electronics.design)
  • Re: PWM generation details
    ... such that the mechanics smooth out the ... common "switches" used in motor drives are transistors and are quite ... you can use one bit per motor rather than enough bits to get the ... overcurrent protection, and thermal protection. ...
    (comp.robotics.misc)
  • Re: wouldnt it be great.
    ... They come with power surge ... >>> protection ... The UPS is! ...
    (microsoft.public.windowsxp.basics)