340 Basic Electrical Component Circuits Flashcards
switch symbols
What are two factors that determine the ratings for different load characteristic?
1) the surge current at the instant the switch is closed
2) the current-breaking capacity for opening the switch under maximum current
In a DC circuit the voltage is always at a __________.
maximum value
________ during contact- make and ________ during contact- break are more ______ in DC circuits.
contact welding
contact arcing
A mechanical device used to open and close an electric circuit is called __________.
a switch
Each movable contact in a switch is called _______.
a pole
Each individual make/beak operation of a switch is called _______.
a throw
Switches are generally rated in terms of the ______ across the contacts when the switch is open and the ______ through the switch when its closed.
maximum voltage
maximum current
A factor that governs the contact ratings for different load characteristics is the ______ at the instant the switch is closed, often found in a motor circuit
surge current