Welcome to EEE Interview Tips

For Your Pre-Professional Preparation!

Download EEEBooks

To Download Electrical and Electronics Ebooks click the "EEE Library" menu! Enjoy!!

EEE Interview Tips

Leave Your Comments, Views And Questions.

Learn to make Electronics

Burn things out, mess things up - that's how you learn to Make Electronics! Enjoyy!!

EEE Forum

Drop your Ideas, Thoughts, Questions and Comments!

May 30, 2013

Draw the Three-Phase Diagram of the Protection Team.

Three-Phase Diagram of the Protection Team.

Write down some Elements of Protection System.

Protection System Elements:

¤ Protective relays
¤ Circuit breakers
¤ Current and voltage transducers
¤ Communications channels
¤ DC supply system
¤ Control cables

How Do Relays Detect Faults?

¤  When a fault takes place, the current, voltage, frequency, and other electrical variables behave in a peculiar way. For example:
o   Current suddenly increases 
o   Voltage suddenly decreases 
¤  Relays can measure the currents and the voltages and detect that there is an overcurrent, or an undervoltage, or a combination of both 
¤  Many other detection principles determine the design of protective relays

Related Posts Plugin for WordPress, Blogger...