A 3-phase IM is supplied from 50 Hz system. It runs at speed of 1440 rpm and slip equal to 4 %. Calculate rotor frequency. A 50 Hz B 0 Hz C 4 Hz D 6 Hz3 2566
In a voltage-controlled current source A A current booster is never used B The load is always floated C A stiff current source drives the load D The load current equals Isc953
The Howland current source produces a A Unidirectional floating load current B Bidirectional single-ended load current C Unidirectional single-ended load current D Bidirectional floating load current1115
To make a basic instrumentation amplifier, it takes A One op-amp with a certain feedback arrangement B Two op-amp and seven resistors C Three op-amps and seven capacitors D Three op-amps and seven resistors1037
How to design a Unit auxiliary transformer for a power house having a unit of 65 MW and Generating voltage of 11 KV and Secondary voltage of 433V1106
Why should not we run the IM in low voltage, if runs means what will happen?(for example instead of 400V we give 250V supply)2 2272
why transformers are put with supply for 24 hours before giving supplying to a locality?2 2867
We have 2 11kv/433v transformers for 2saperate acb for mv panels and 1 bus coupler acb. Suppose I’ll close bus coupler what will happen or it will be share the load. Please suggestion and any modification required.1 2155
10 hp motor ,7.5 kw ,960 rpm, full load current 15.5, delta connection so how much take current no load trial time. any formula please give..... second question :- what is different between brekar control wiring and motor starter control wiring
Maximum efficiency occurs in electrical machines is at i)Full load,ii)50% of full load,iii)Near full load,iv)None of these1 3114
CAN WE GENERATE AC WITHOUT DC EXCITATION?1 2240
HOW TO TEST THE SODIUM VAPOR AND MERCURY VAPOR LAMP ?1 2763
what is reactive power?, why its measured in VA ? is it transient behavior of system?
what is the Connected Load (kW) or Contract Demand (kVA)of mahindra nasik plant??
The power factor of the fixed load is 0.8, now the p.f is varying from 0.8 to 0.5.
How they LT panel busbar size choose
What is the ratio of Booster transformer?
What are the criteria shall be considers for sizing Fuse and MCB? If the rated current is 10Amps what should be the fuse size / MCB Size?
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
what is x'mer ,isolation x'mer & yltra-isolation x'mer?????
How a capacitor discharge weld power supply works? what is the use of a pulse transformer?
Difference between megger test equipment and contact resistance meter test instruments?
If the rated speed of a d.c. Shunt motor is1440 r.p.m, which method of speed control would you suggested to obtain a speed of 1500 r.p.m?
how do we calculate length of starting time and repeated starting of a direct online starter?
what is doid
How does "OUT OF STEP" relay ,for Synchronous motor protection, work?
y we use neutral,all r told its used to for closed path..k its a just used to closed path,in a transmission line y we put same conductor used n both phase and neutral..if we use less than phase conductor in neutral mean we ll reduce cost its right r wrong..if we use mean any problem occur in transmission line..