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Electrical Machines
A delta/star transformer is connected in parallel to a star/delta transformer. The turn ratio former is x times latter, the x is
3
1/√3
1/3
√3
3
1/√3
1/3
√3
Answer
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Related Question
Electrical Machines
Thin laminations are used in a machine in order to reduce
Both 1 and 2
Hysteresis losses
Copper losses
Eddy current losses
Both 1 and 2
Hysteresis losses
Copper losses
Eddy current losses
Answer
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Electrical Machines
The demagnetising component of armature reaction in a DC generator
results in sparking trouble.
increases armature speed.
reduces inter poles flux density.
reduces generator emf.
results in sparking trouble.
increases armature speed.
reduces inter poles flux density.
reduces generator emf.
Answer
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Electrical Machines
If the air gap of IM is increased, ____________ will increase.
air gap flux.
speed.
power factor.
magnetizing current.
air gap flux.
speed.
power factor.
magnetizing current.
Answer
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Electrical Machines
The use of higher flux density in the transformer design
has no relation with the weight of transformer
increases the weigh per KVA
reduces the weigh per KVA
None of these
has no relation with the weight of transformer
increases the weigh per KVA
reduces the weigh per KVA
None of these
Answer
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Electrical Machines
What are slot wedges in a DC machine made of?
Silicon steel.
Cast iron.
Fibre.
Mild steel.
Silicon steel.
Cast iron.
Fibre.
Mild steel.
Answer
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