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WorksheetsStar Delta connections of Transformers
Total questions: 10
Worksheet time: 5mins
The ratio of the voltages of the primary and secondary transformers is equal to
NpNs
NsNp
The current
The power
The ratio of current equivalent to VsVp is
IpIs
None of these
IsIp
Each coil in a three phase transformer is set (a) degrees apart.
In a Delta system, how many currents are there?
(a)
Tick all of the following that apply to delta connection:
VL = Vp
VL = 3 x Vp
IL = Ip
IL = 3 x Ip
Delta connections are unbalanced loads that require a neutral.
True
False
Delta connections are balanced loads with equal currents on each line.
True
False
Tick all that apply for a star connection of 3 phase transformers.
VL = Vp
VL = 3 x Vp
IL = Ip
IL = 3 x Ip
In which configuration do we use Vp = 3VL to find the phase voltage?
star
delta
In which configuration do we use Ip = 3IL to find the phase current?
star
delta
