Solved

Power Surge vs Spike

Posted on 2002-04-09
6
3,027 Views
Last Modified: 2008-01-09
How to verify that a internal modem card was destroyed by a power surge and not a power spike, for warranty claim purposes.
0
Comment
Question by:hhheng
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
  • 2
  • 2
6 Comments
 
LVL 18

Accepted Solution

by:
Wakeup earned 50 total points
ID: 6930363
Q.: What's the difference between a power spike and a power surge?
A.: A power spike is a very short burst of high voltage lasting just a fraction of a second; a power surge is a longer burst of high voltage. Because these events occur so quickly - often with no apparent interruption of power service - their damaging effects tend to be cumulative rather than immediate.

Power spike A sudden increase of power that lasts less than a millionth of a second.

Power surge A sudden increase of power that can last several seconds.


Here are some examples of the differences.  It may not be very easy to tell which is which.  But here is what I have found.

http://www.cowlitzpud.org/Surge%20Protectors.htm
http://www.electrosafe.co.nz/power2.htm
http://www.hometoys.com/htinews/dec98/articles/apc/apc.htm

So from the looks and sounds of it, it may be do to a power spike.  But not real definite way to tell.  Surges last longer than spikes...so if it was a surge it is possible that more damage could have been done.  But depends also on the hardware you have....if you have a surge suppressor or spike suppressor etc.  If you have a surge suppressor and it failed to protect some of your equipment like your modem because it was either not quick enough orrrrrr....the power surge/spike went through the phone lines then it would be a different matter....unless you had a supressor that covered your phone lines as well.
0
 
LVL 31

Expert Comment

by:rid
ID: 6930704
Sounds improbable to me that an internal modem should succumb to either event. Computer PSU normally executes some kind of regulation. Other components (memory, video card) seem more fragile. Not that it's impossible of course. Overvoltage on line in seems a more reasonable cause for damage. That would be a "spike" probably, caused by lightning or other violent electrical event, rather than a "surge", since it is hard to imagine a damaging surge in such a system (if we agree on a surge being some sort of prolonged overvoltage).

Regards
/RID
0
 

Author Comment

by:hhheng
ID: 6930791
Weblink on power surge & spike are good reading materials. I now understand better, though it's a litte too late. I slept through a thunderstorm and the next morning, my modem couldn't make a dial tone. So I have to purchase another modem card. Since warranty for modem covers only power surge, I guess power spike make a hole on my pocket as well. Better buy a surge/spike supressor to prevent any more damage.

Thanks Wakeup and RID

Cheers..
0
Ransomware-A Revenue Bonanza for Service Providers

Ransomware – malware that gets on your customers’ computers, encrypts their data, and extorts a hefty ransom for the decryption keys – is a surging new threat.  The purpose of this eBook is to educate the reader about ransomware attacks.

 
LVL 18

Expert Comment

by:Wakeup
ID: 6930820
no prob rid.  I have seen that happen before with a couple clients in the past.  Even with surge/spike supressors, modems fry because they are hooked into the fone line.  If a fone pole gets zapped with electricity it Can/May/could/would cause problems.  So if you get a surge/spike supressor make sure it has ones capable of protecting the fone line.
0
 
LVL 31

Expert Comment

by:rid
ID: 6930875
Additional:
Many devices intended for phone line connection have a spike protection circuitry at the input point, consisting of two small resistors and an overvoltage breakdown device. A spike will cause a breakdown/shortcircuit and the resistors will fry, all according to plan. If you're lucky these resistors are "big" enough to see and unsolder/replace. This has helped me on a few occasions.

Cheers
/RID
0
 

Author Comment

by:hhheng
ID: 6931704
Thanks for the added comments.

Cheers again...
0

Featured Post

Comprehensive Backup Solutions for Microsoft

Acronis protects the complete Microsoft technology stack: Windows Server, Windows PC, laptop and Surface data; Microsoft business applications; Microsoft Hyper-V; Azure VMs; Microsoft Windows Server 2016; Microsoft Exchange 2016 and SQL Server 2016.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This paper addresses the security of Sennheiser DECT Contact Center and Office (CC&O) headsets. It describes the DECT security chain comprised of “Pairing”, “Per Call Authentication” and “Encryption”, which are all part of the standard DECT protocol.
In a recent question (https://www.experts-exchange.com/questions/29004105/Run-AutoHotkey-script-directly-from-Notepad.html) here at Experts Exchange, a member asked how to run an AutoHotkey script (.AHK) directly from Notepad++ (aka NPP). This video…

751 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question