What is the permissible sound level for 1000kva DG set and how the sound level is calculated.
1 2745why rotor winding in induction motor is not earthed. normally we uses star winding in rotor .why?
3 7487Hi all I had applied for the RRB test in the ELECRICAL category. I would be pleased if any of you can sent me previous year question papers. Please forward the question papers to varshashahi@yahoo.com Thanks and regards Varsha
1697Please sent me some previous year question papers of BSNL-JTO telecom and RRB in ELectrical Engineering to varshashahi@yahoo.com
1552For a Potential Transformer(PT), the primary neutral terminal must be grounded before energization. Why....? What will be heppend if we energize the PT without grounded the primary neutral point? Why..........?
2 15685Post New Electrical Engineering Questions
how does high earth to neutral voltage affect electronic equipment?
If i have two 3000 kW motors and the whole facility requires a 10 MVA transformer. What would be better installing two 5 MVA transformers(one for 1 motor ) or just a single 10 MVA transformer for both of them. Give reasons for your answer.
why are distributed windings generally used in alternators?
we have two generators different capacity on 15 MW and other 6MW at 11 KV , 15 MW gen. bus short level current 40KA,and 6MW short level current 25KA,, length of cable 100MTR between 6 MW from 15MW gen. for bus coupling . kindly tell any one can we use both NGR OR one NGR from any GEN. BOTH NGR has diff. rating. Tariq pakistan
why the value of k is more in shell typr transformers?
how can service sitting be setted for MCCB?Example for sittings IR (CURRENT RATING),IS(CURRENT STARTING)IO (current operating)?
How Self works in DG set
why is using sensor?what is differece between photoelectric and proxmitty?
Bimetal strip used in overload relay what is that,which types of material used for that & percentage.
Describe the test procedure to determine the vector group
If only R Phase is connected in 2 pole elcb, n is not connected than it will work or not in ground fault.
Main advantage of auto transformer over two windings transformer is that A it needs no cooling B it uses only one winding C core losses are reduced D it has simple construction
what's prime importance of protection in electrical system.if protection system don't work properly what can happen in electrical system?
A 3-phase IM is supplied from 50 Hz system. It runs at speed of 1440 rpm and slip equal to 4 %. Calculate number of pole pairs. A 1 B 6 C 2 D 3
what is the working process of over & under voltage relay.
