On what principle reluctance motors work?1 2684
What is the difference between magnetic loading and electric loading of a machine?2 33297
How the size of electic machine vary with the sped? Between slow and fast running machines of equal ratings, which one is more economical to design?1 2155
Why machines are avoided to work is saturation region of B- H curve?3 3487
Why different values of B’s (magnetic flux density) are chosen for DC machines and Induction Motors?1 1941
How the output,losses and temperature of machines varies with linear dimension?1 2391
Why air gap in rotating machines should be small?3 5569
Why rotating machines are not allowed to run near critical speed region?2 4711
From stability point of view,What(higher/lower) should be the value of inertia constant of rotating machines?1 2426
how to reduce humming noise in transformer?3 7700
There are two nos of 33Kv/11Kv 5MVA transformers conecting through HT cable from substation having metering at substation itself.One transformer used at a time another remains stand by.Further 11 nos of 11Kv/440V transformers are attached on it and each transformer is having its own Power factor correction panel.Now one 33/11Kv transformer at no load condition/Stand by condition is having power factor in leading side upto 0.21 and while when another tranformer at same situation have power factor in lagging 0.42. Now one thing is clear that transformer one is having 1.5 Km long 33kv cable due to that PF goes in leading side and another is having only 250 mtr length remains him lagging. Now i want to know that how i can maintain the Power factor at no load/ stand by position though both are behaving in seperate manner.1 5370
Why oil preferred over the air as a cooling medium for high rated transformer?1 2977
What is emperical relation.Name few of them which are used in electriacl engineering?1 2526
In the ACB breaker capacity is 2000Amp but this each phase taken 1250 But total beldibg load is 600amp or 700amp watt is the problem1028
How may I get the maximum current capacity for a particullar size Alluminum or Copper cable if there is compulsion to use?
what are the tests comes under the type test, what tests comes under routine tests.
What are the advantages of stationary armature and rotating field system?
Why Neutral Isolation is required?
Who are the manufacturer for Nitrogen based Fire Protectio/explosion prevention for Oil Filled Transformers? India and international both?
What is rotating magnetic field?Discuss elaborately.
why would amp draw on neutral wire be as much as amp draw on the hot leg.
How does a television work?
Explain M Var? Which types of problem occurs when reactive power increase at the time of full load of plant and at the time of synchronize of plant?
On what basis the the size of Lightning arrester for buildings are selected ?
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What is quadrantal symmetry?
Differentiate between Zero and Negative sequence current
What is the Good Earth resistance value of G.I & Cu. Chemical Earthing & Normal Pipe Earthing?
Define piezo-electric effect?