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when a cunductor is being disconnected from live cct, still it showing charged, if its checked by line tester?
GEB,
8 10234why three phase system is not preferred in aircrafts power cckts if yes than explain reasons?
3 5969wat is the importance of reactive power in power generation.....if it is zero means wat will happen to system........
22 43126what is difference between differential protection and distance protection and how we calculate the sloop?
5 46110what is slip resistance? how much its value in 110 kw motor? why voltage is varied in vvvf drive ?
1 4953Why P.f. of the system decreases when it is connectect across induction motor? & how to maintain the p.f. of system to unity.?
6 10769Post New Electrical Engineering Questions
I have 2 KW electric water heater.I am gonna use it in controlling water temp.so I needed to increase or decrease the heating capacity.is there any electrical-electronic circuit for varying the resistance & so current?
where is the need for short circuit test for 3 see is required and why? can you explain in brief with application
Inductor and capacitor........power in one phase and ...... in it another phase.
How to calculate the time setting for star connection in star delta starter? For example 10KW 3PH Induction motor.
why is the conservator tank painted white on the transformer
any one please tell taht what type questions will be asked in BHEL interview, i am having interview on 24th Dec, please send this to mail pradeepsistam@yahoo.co.in
what is inverter and converter
Whats the difference btwn a latch, port,data bus buffer? Do they all not hold data in d flip flops??
1. A 380 / 220 V r.m.s. 3-phase 4-wire circuit carries loads of 8 + j8.1 ohm; 4 + j4.1 ohm; and 2 +j2.1 ohmin the three phases respectively. The length of the circuit is 100 m, and the resistivity of the phase conductors is 0.0005 Ω/m. The neutral conductor is of the same size as the phase conductors. a) Select a reference angle 0for the first phase. Then write down the three phase voltages in both polar format and complex number format. b) Make appropriate assumptions, and take temperature effects on resistance is insignificant. Calculate the currents in the three phases. (Note: Determine conductor resistance, and apply Kirchhoff’s Voltage Law) Based on the result, suggest a main switch rating for the circuit. c) Show your preferred direction of neutral current in a diagram, and then determine its value. (Note: Apply superposition principle, and Kirchhoff’s Current Law) Use its magnitude to show that in this circuit, the unbalanced load may increase the voltage drop in some of the phases. (Note: Also observe the common volt drip in neutral) State your assumptions, if there are any. d) Suddenly the neutral wire of the circuit is broken. Estimate the new currents in the first phase, i.e. Phase L1. State your assumptions, if there are any.
how to extend relay operating timing in 24V dc relay card (without using Timer )
what is the function of impulse relay
how to calculate cooling requirement of datacentre from electrical load?
What are the three major categories of error?
What is hipot test procedure?
can I improve the furnace power factor (10 mva transformer) by adding a capacitor bank before the transformer.Does system power factor vary a lot with the furnace PF?
