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10 More Computer Tips About Electricity Buying a New UPS PC Power Strips Choose A Case Wisely

 

About Computers and Electricity (Goto Page 1)

 

   What you should know before attempting to repair or build your own PC.

Electrical energy properties are measured in various ways. 
These pages are here to help in the understanding of this topic as it relates to computer repair.
Always hire trained and certified professionals to work on electrical devices.

 

 EMI (Electromagnetic Interference)

Electromagnetic interference (or EMI, also called radio frequency interference or RFI) is a (usually undesirable) disturbance caused in a radio receiver or other electrical circuit by electromagnetic radiation emitted from an external source

 
Caused by magnetic field produced as a side effect of electricity

Shielded data cables offer partial control

Computer Power supplies are shielded to prevent emission

An AM radio tuned to a low-frequency range can detect EMI

 

Surge Protection and Battery Backup

 

Surge Suppressors

  
  1. Provides a row of power outlets and on/off switch that protects from over voltages on AC power lines and telephone lines
  2. Shunt type absorbs surge.
  3. Series type blocks surge from flowing
  4. Measured by clamping voltage, the amount of energy it can absorb
  5. Joules like a diamond the higher the rating the better.

 

Power Conditioners

 
  1. Provide protection against spikes
  2. Also regulate or condition power
  3. Provide continuous voltage during brownouts

 

Uninterruptible Power Supply

 
  1. Provides backup power when AC fails
  2. Offers some filtering of the AC
  3. Conditions line for both brownouts and spikes
  4. Protects against very high spikes that could damage equipment
 

Smart UPS

 
  1. Controlled by software through USB, Serial Port or parallel port connection to PC
  2. Offers diagnosis of UPS
  3. Monitors quality of electricity received
  4. Monitor the percentage of load carried during a blackout
  5. Sends shutdown alarms during blackout
  6. Remote startup of system through telephone phone lines
   

 

What you should Consider When Buying a UPS

 

 

 

 

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