Answer / guna

Commutator function is to deliver the dc supply at the
output terminals, it only happens when there is a
rotating part on the equipment cause it reverses the emf
when there is an alternate south and north pole crosses
at the mid point of plane. The collection of current only
possible when there is a carbon or copper brushes
attached on the surface. So We cant see the whole setup
in power electronic devices, And more over that, the main
objective of power electronic devices is to operate at
higher current and voltage levels within compact sizes
(tiny size), for reliability. Due to rotational parts
losses also increases & wiring cost & insulation
required. Commutator can't terminate the ripples or
disturbances in the output supply but power electronic
equipment's can do. So power electronic devices more
sophisticated than commutator.

why restricted earth fault protection can not operate for phase faults??as there will be a current in secondary of ct,when a phase fault occurs!

1 Answers   GMR,

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Air refrigeration cycle works on the

0 Answers   Caterpillar,

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what is real and reactive power?

2 Answers  

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Describe the method of Plate Earthing.

1 Answers  

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why we use to always generate power below 16kv.why not at higher voltage?

3 Answers  

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wht is the purpose of the earth electrode other then earthing

1 Answers  

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Where voltage are high and current to be interrupted is low the breaker preferred is:

0 Answers  

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2. Modify your design in question 1.a so that the circuit works according to the following function table X Y F 0 0 Clear 0 1 No Change 1 0 Parallel Loading 1 1 Count 3. Design a circuit that detects the pattern 010 in a serial input X considering: 3.a Overlapping 3.b No overlapping

0 Answers  

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Where is the center of magnetic field in alternator

1 Answers   GMR, Siemens,

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what is single phase motor?

5 Answers  

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I have 11KV/415V power distribution transformer. I have found unbalance current in LT (415V) side. Also observed that unbalance voltage (3V) at LV side due to HV side unbalance voltage. What should I check for this? Also, the same LV side load can run in balance on captive power.

1 Answers  

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what are the assumptions made in swineburne's test?

0 Answers  

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