eg1 chapter 9 Flashcards
a distribution line consists of what 3 main elements?
primary, secondary, services
a recloser has the ability to reclose up to
4
a regulator can automatically increase and decrease voltage by?
10%
capacitors introduce inductive reactance which counter acts capacitive resistance true or false?
false
main lines are also refered to as?
feeder mains
when referring to our distribution power the power must be delivered…………, ……………. with minimal …………….
quality, reliably, loss
underground systems that service many customers that can be fed from 2 ways is called what?
loop design
many cities are switching to underground true or false?
true
where is the post insulator located?
top of the post
will be used with a reclosure to insulate a section of line
secionalizer
distribution lines are typically not longer then?
50 miles
transmission lines may be how many miles long?
hundreds
main lines will have ……………………. than tap lines
longer cunductors
most circuits are four wire, three phase with a neutral conductor, which is called …………………. or star system
WYE
how many wires are in a delta system?
Delta system
what is the name for the part of the system that operates between 120 to 240 volts?
secondary
two types of insulators?
porcelain and polymer
a reclosure has the ability to reclose up to ……… times to determine if the fault is temporary or permanent
4
capacitors introduce …………, which counteracts the negative effects of …………..
inductive reaction
the high voltage portion of a distribution ine
primary
this is low voltage (120-480 volts) and runs from pole to pole on overhead systems or padmount to pedestal in underground systems
secondary
low voltage, but run from pole to customer on overhead systems or pedesta to customer underground systems
services
offer more contact area at the point of attachment and used with higher conductors
post insulators
most commonly found at dead end structures
polymer insulator
