Answer / shiva reddy

DG lube oil Specification is 15W/40
Difference between DG oil and Transformer oil is
DG oil is used for lubricating purpose because in DG Engine
lot of rotating parts are there,
Transormer oil Specification is 40KV and it is mineral oil
we are using oil in transformer for insulating and cooling
purpose

Answer / sanjay

DG lube oil Specification is 15W/40,also it acts lubricants,
Transormer oil Specification is as per IS 335 and it is
mineral oil insulating and cooling&minimise the size of
transformer

Answer / saravanakumarsolairaj

DG oil specifications is API CF,CF4 and upto CI4 for the diesel generators and viscosity grades suchas SAE 15W40 ,20 w 40 20W50,40,50 etc..to suite the environment.

DG oil is Crankcase lubricating oil.
Transformer oil is Insulating oil.

Answer / khan rehan

15w/40 oil is very smooth that's way we can use in DG because in DG so many moving parts .and transformer oil work as a insulater between winding and tank.

explain me how a power factor is improved by adding a capacitor?what capacitor do to improve it?in simple words and in detail?thx

7 Answers  

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In the solution of load flow eqation, Newton raphson method is superior to the gauss siedal method because (a)the time taken to perform one iteration in the NR method is less when compared to GS method (b)the number of iterations required in the NR method is more compared to that in the GS method (c)the number of iterations required is dependant on the size of the system in the NR method (d)convergence characteristics of the NR mehod are not affected by the selection of the slack bus

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How many 2 ton window A/c can runs on a 125 KVA generator?

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IF we have 500kva transformer 11.0/0.415V, 50Hz. How to calculate the current on HT & LT side, how can we consider for its breaker (HT & LT both)? You are requested to solve the question herewith.

3 Answers   Bhutan Power Corporation,

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IN MY SYSTEM THERE IS ONLY OVER CURRENT EARTH FAULT RELAY IS AVAILABLE. FOR THE UNBALANCE SENSING IS THERE ANY RELAY IS AVAILABLE? THE SAME CTs WHICH ARE USED FOR THE OVER CURRENT EARTH FAULT RELAY CAN USE FOR UNBALANCE ALSO?

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in small capacitor we use uf( micro farad) and in big quantity we used kvar. i want to know that in 1 kva how much will b uf(micru farad).

2 Answers  

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how to calculate capacitor rating for an induction transformer ex.for 12 mva furnace calculate capacitor rating

2 Answers  

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How to discharge the battery as quickly as possible ?

1 Answers  

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why needtwo winding LV and HV in transformer?

1 Answers   Organic Industries,

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a 100mva,400/200v transformer has leakage impdce of 10% draws a steady state line currentof---------------

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I HAVE A INCOMING 100A MCCB TPN 25KA, CABLE LENGHT OF 80M 70MM CABLE SIZE FROM MAIN SUBBOARD TO NEW DB.BASE ON THE FAULT LEVEL SETTING OF 45KA.I WOULD LIKE TO FIND OUT 25KA ENOUGH KA. APPRECIATE IF SOMEBODY CAN ASSIST ME WITH FORMULA FOR THIS. FRM: JEFF

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When electric field is parallel to the plane of incidence, the electromagnetic wave is said to be a.Linearly polarized b.circularly polarized c. Elliptically polarized d. Hyperbolically polarized

1 Answers  

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