O&M Training Center Handbook On Curcuit Breakers Flashcards
1
Q
Plasma is defined as…
A
The state of matter in which electrons are removed from atoms or molecules, creating an electrically conductive gas.
2
Q
The plasma performs what essential function, when breaking a circuit?
A
Flow between two open circuits
3
Q
True or false
The purpose of the blast valve is to blow the arc from the stationary fingers to the arcing probe. It also cools and lengthens the arc so it will be extinguished at the next current zero.
A
True
4
Q
What is the purpose of the SF6 gas in air blast circuit breakers?
A
Insulate the support column current
5
Q
Why must the air in the breaker high air pressure system be very dry?
A
Because it is the insulating medium between two contacts
