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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 Hz
3 5120In 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 Isc
1890The 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 current
2084To 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 resistors
1977How 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 433V
2137Why 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 3953We 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 350610 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
MSP,
1 7331Maximum efficiency occurs in electrical machines is at i)Full load,ii)50% of full load,iii)Near full load,iv)None of these
1 4731Post New Electrical Engineering Questions
what will happen if i connect 12 volt battery with 24 volt battery charger.
although ckt breakers have taken the place of old fuse. But instead of it , these older ones are still used in the industries and homes ? why .... what are their advantages and disadvantages ? which one is leading and winning the race and competition ?
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 value of earth resistance required for substation and equipment earthing and what are the reference guidelines
BRIEFLY EXPLAIN THE STORAGE CLASSES AND THEIR TYPES IN C
How delta connection in the primary of distribution transformer reduces harmonics?how delta connections reduces harmonics?Please answer me...Hope that question is correct.
Give the topology of current amplifier with current shunt feedback?
What should be setting for alarm,tripping and cooling fan on for power transformer's oil temp. and winding temp. indicator?
What is the actual calculation for transformer short circuit test?.
How to test Alternator stability test for REF relay
what is mean by Digital Logic Meter (DLM)
what is Insulation monitoring device. where it is used? (in switchgear room or control panel or in field equipment)
What is the difference between resistance grounding system and resistance earthing system?
how invertor convert the dc into ac give brif detail
why only exciting current is shown not primary current in transformer???
