Answer / pravesh

the difference between the electroic and ordinary regulator
is that in electronic reg. power losses are less i.e. for
as we decrese the speed the electronic reg. give the power
needed for that perticular speed but in case of ordinary rh
type reg. the power wastage is same for every speed and no
power is saved

Answer / bhanu pratap

in electronic regulator triac is employed for speed cntrl.
by varying the firing angle spreed is cntrled but in
rheostatic ctrl resistance is decreased by steps to achieve
speed cntrl

Answer / leo thomas

in electronic regulators diac or triac is used.These
devices conducts only some firing angle that means we are
utilizing only a part of the sine wave,not completely.
In rheostatic control total sine wave using ,here energy
wasting

We have a 33/11kv switchyard having 12.5 MVA power transformer. We export & import power through this transformer. When we export power, the PF will be depend on GRID PF & when we import power the PF will be depend on our load PF. but the problem is that,when neither we export nor import but our 33KV vCB is in close position,our meter read the power factor 0.14 to 0.25 at that moment. So how can be we improve the power factor at that moment.

3 Answers  

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what is power factor

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iam working as a electrical engineer. i want to know about any license or certificates regarding my field. for my carrier and ti improve the knoweledge.,,, how we get that..and what procedures......... pls help me

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what is cathodic protection in Tank,and product pipelines?

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Explain the Term in CT Name Plate – Class: 5Ps

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is it possible to minimize the copper loss?

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where used of HVDS system.

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what is transient earth voltage

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NGR? What is NGR?

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