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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 3491Why different values of B’s (magnetic flux density) are chosen for DC machines and Induction Motors?
1 3223From stability point of view,What(higher/lower) should be the value of inertia constant of rotating machines?
1 3791There 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 6750In the ACB breaker capacity is 2000Amp but this each phase taken 1250 But total beldibg load is 600amp or 700amp watt is the problem
1964Post New Electrical Engineering Questions
Is it possible to connect a safety device in to parallel?
How to size fuse? How to size MCB?
WHat is the general checks required for Dry type transformers
why transformer tank is in rectangular shape what happen when it is in step shape
how give earthing conection to household equipment?
can any one suggest me the tilt angle of my solar pannel ?? or tell me how can i know the fix tilt angle of my solar pannel?? my cordinates are 31.503629,72.993164.
How to calculate the time setting for star connection in star delta starter? For example 10KW 3PH Induction motor.
12.5 tons a/c is their how much kva generator can recommend to the customer.
what is the safe meggar values for motor, transformer HT, LT and Cables? IF we want to replace I/C bay at our 220 kv substation which is of 140 mw load capacity bay to be replaced by 400 mw capacity bay.other than CT(1200/1) what are the other equipment i have to replace. why we generally use 3.5 core cable or in other word 1/2 core for neutral and also confirm me that in balance conditiob(3 phase)current in neutral will zero
how we can decide that what value of ht line will come to any commercial building? (ans except According to the building load)
what is RFCT and Insulgard Relay & It's function?
Why do we need interlocking in a HT metering or Ring main unit switchgear?
What is meant by earthhing of a magnetic flow meter and when to use empty pipe detection?
what is efficient motors and how it is different from normal induction motors
1.how many earth pits are required for 1000 k.w plant include substion , transformer ? 2. how many earth pits are required for 500kva generator.what is formula to calcute?
