Test 4 Flashcards
What is a main line?
A distribution line composed of either 3 phases and a neutral or just 3 phases.
Tap line?
Lines going directly to customers fed from the main line.
WYE system?
THREE phase line with a NEUTRAL
Primary?
The high voltage portion of a distribution line.
Secondary?
Is low voltage (120-480) and runs from PADMOUNT TO PEDESTAL
Services?
Also low voltage like secondary but run from pole to CUSTOMER.
Acceptable voltage range?
114-126 volts.
Phase to neutral?
7200 x 1.76
The majority of distribution poles are?
35-55ft high.
Underground is how many times more expensive than overhead?
4 times.
What material are insulators made of?
Porcelain or polymer.
Pole mounted transformer?
A key element used to reduce the voltage to a level that can be used by customers.
Designed to open all three phases but not break load?
Gangswitch
Designed to break fault duty.
Recloser
Used to connect inductive reactants?
Capacitors
What contains a normal opener?
Loop design
Connected together to form a low voltage grid network?
Network grid design.
Distribution line
Must deliver power with quality and reliability <50 miles long.
