Interested to Buy Any Domain ? << Click Here >> for more details...
why 400Hz is used for aircraft systems ?
- 14 Answers
- 55472 Views
- Cabin Crew, Jet Airways, I also Faced
- E-Mail Answers
Answer Posted / ashish yadav
IN A AITCRAFT SPACE SAVING IS IMPORTANT, BY USING A 400 HZ FREQ THE SIZE OF MOTOR, GENERATOR, ALTERNATOR & TRANSFORMER SIZE CAN REDUCED BECAUSE SPEED IS DIRECTLY PROPORTIONAL TO FREQ AND INVERSELY PROPORTIONAL TO FLUX THERFORE FLUX IS INVER TO FREQ.HIGHER THE FREQ LESSER THE FLUX AND LESSER THE CORE SIZE MEANS LESS WEIGHT AND SIZE.
ALSO 400 HZ IS A CRITICAL FREQ ABOVE WHICH CONDUCTOR SHOW SKIN EFFECT MEANS START RADIATING, THIS AFFECT THE RADIO SYSTEM PERFORMANCE.
| Is This Answer Correct ? | 46 Yes | 3 No |
Post New Answer View All Answers
A mass of 1200g is accelerated at 200 cm/s2by a force. The value of the force required is:(a) 2.4N(b) 2400N(c) 240 kN(d) 0.24N
234 MVA Generator 3 phase Short circuit current Values required? Gen set Rating-234 MVA, Gen Voltage-18kv, PF;0.8, Xdv:23.5 %, Transformer Rating-18/380KV, 680MVA,Yndd1 two winding, Step up TR, ZT:35.50 %,X/R 4.33 Gen CB Position, CB open ,Disconnected open, Generator Running Voltage 18 Kv, Bi mistakes generator side earth switch Closed during that time short circuit current level in 3 Phase required, and how to test on site 234MVA Generator Short circuit current,
The SFC of an engine is 0.25 kg/kW hr. when the fuel used has a calorific value of 36000 kJ/kg. the thermal efficiency of the engine is
quantizer means?
IF ANYONE HAVE ANY QUESTION ASK ME AT MY MAIL anmol.bhardwaj5@gmail.com
what is meant by residual over voltage & residual earth fault ?
hi friend i am going too attend for hpcl in this month please help me by sending written test question papers i am in the stream of E.E.E
What are the advantages of thermal power plant?
can mini-curcuit supply MIL-tested transformer !
A 3 phase transformer's (Y-Y) Y and B phase is (Y and B connection not broken) broken from neutral and R and Nutral connection is ok, what will be the relay tripping and why
diff b/w elcb and rccb
Dear sir, How to calculate 3.5 core pvc aluminium armoured cable meter wise carrying amps rating.Please give the solution with a good example.
do anyone out there know where to find a compleete list on acronyms/abbreviations used in offshore electric engineering. MCB - Micro Circuit Breaker, MCCB-Mouldes Case Circuit Breaker, ELCB-Earth Lekage Circuit Breaker, ELMCB- etc.....
Determine the BTU size of an aircon for 20 sq metre room
Discribe type of fault in DOL and stardelta startor.
