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how u select control transformer for a mccb panels or any panels?for expample we hav 440 volts maim supply and control volts is 230v?
2173How to run 1ph motor(230 VOLTS its full load amps is 4.5 ampa))with 480 volts main(we didn hav neutral)Thn we go for step down transformer.Our load 10 amps,so we conisder this amps in primary are secondary side?
1 3504140 is load amps for a equipments and what ratio of CT requied for installimg ammeter to amps montering purpose?
1 4251If mutual flux is 1.2wb & power factor is 0.8 lag , then what is the Useful flux of a transformer?
4491To test Transformer we give HT side 440V to see wheather that it is producing 17.6V on LT to verify Voltage ratio is correct or not but when we give the 440V voltage to LT side then what will happen to HT voltage ?
3 8168in 33KV or 66KV system which connection is aviable on high voltage transformer primary delta or star ?
3 6219Post New Electrical Engineering Questions
What is mason's gain formula?
i have a 4 Mva transformer 34.5 kv / 480-277 v and i used 2 parallel 3200 amp bus duct for the secondary feeder using 3 ply of bus bar ( 3/8" x 5" ) as a common where the flexible link terminated and 6300 amps breaker for the main, the lower bus duct reaches 70 degrees and the upper bus duct reaches 55 degrees when i used thermal scanner. why the temperature is not balance when the load reaches 3600 amps.
Why power factor should not be in leading (capacitive) mode of any load.
please send me privious exam's queation papers of section engineer(electrical).
how calculated Transformer losses.
True or false question. 1.The fuse provide phase and neutral 2.power loss in electrical circuit can take place in (resistance or inductance or capacitance). 3.two phase system each phase has separated by a phase difference of (90 or 180 or 270 or 45). 4.3 phase balanced star connected load neutral current shall be (line current or phase current or zero or unity)
I am going to appear for the RRB Chennai junior Engineer online exam. Please send me the previous exams question papers (also solved) to my mail id: rrkhandhar@yahoo.com
What is the difference between electronic regulator and ordinary rheostat regulator for fans?
block diagram of 2 ups system connected in parallel mode?
why are u join ntpc
what is meant by carrier aided trip protection in transmission line
An ISP is granted a block of addresses starting with 150.80.0.0/16. The ISP wants to distribute these blocks to 2600 customers as follows. a) 200 medium size businesses; each needs 16 addresses b) 400 small businesses; each needs 8 addresses c) 2000 households; each needs 4 addresses Design the subblocks and give the slash notation for each subblock. Find out how many addresses are still available after these allocations.
how we calculate torque ? how we improve it ?where torque will either motor or generator ?
what are the precuation should be taken ahen installing power transformer,circuit breaker,current & potential transformer
What is electrical grounding?
