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Electrical science
Three Phase Circuit
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Luke Zamoras
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Cards (17)
principles of three phase circuits: 1. Current is the
same
in all phases 2. Current is the
same
in all phases 3. Current is the same in all phases
What is Vl
Line Voltage
What is Vp
Phase Voltage
What is Il
Line Current
What is Ip
Phase Current
What is the formula for Delta/Star Connection System
IP
=
IL
/
√3
IL
=
IP
x
√3
VL
=
VP
What is a
Three
Phase
Supply
A
neutral
function of the
generation
process
What frequency does the conductors carry
It carries
Three alternating
currents of
same
frequency
What is the formula for Delta/Delta Connected System
Vp
=
VL
/
√3
VL
=
Vp
x
√3
IL
=
IP
What is not needed for a linear load
A
neutral
conductor
What is required for high voltage transmission?
The
transformer
configuration is Delta delta no neutral or
earth
is required
How is the Secondary distribution done
The neutral & earth are picked up from the star point of secondary winding
What is the
potential
(
voltage
) of
earth
0V
Why are Three phases generated
To allow industries to reduce the size of the machines that it uses.
Why use Three phase
It cheaper and more efficient to do this way
What does a rectifier do
Change AC to DC
What does RMSstand for
Root Mean Square