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Electrical Engineering
Electrical engineering is a field of engineering that deals with the study and application of electricity, electronics and electromagnetism.
23,056 Questions
How i calculate of dg full load?
I'm not sure what you're asking - is DG distributed generation? Full load would be provided by the DG; if it's a 40MW wind farm, it will be able to provide you with turbine data; each turbine will be able to provide so much kVA. I would use this number (instead of kW output) for sizing of equipment as this would give a maximum. You may also need to take into account any D-VAR and capacitor bank effects on this cumulative KVA.
What is function of mho relay?
OFFSET IMPEDANCE RELAY
Offset impedance relay is also known under names ADMITTANCE RELAY or MHO RELAY
Difference between off load transformer and on load transformer?
Hope this helps
An "OFF-Load tap transformer" can only have it's tap adjusted when it is De-energized,while the "On-Load tap transformer" can adjust its tap under load conditions.
Kind Regards
Hammad Khan
University of Western Australia
AnswerAn 'off load' transformer is one whose secondary is open circuited, and not supplying a load. An 'on load' (not 'load') transformer is one that is connected to a load.
Who was the first person to obtain MRCP and FRCS in India?
I think it has to be Dr Bidhan Chandra Roy...who acquired both MRCP and FRCS diplomas in an incredible time span of two years and three months..
What is electrical charge measured in?
Coulombs.
1 Coulomb = 6,241,510,000,000,000,000 electron or proton charges (rounded to the nearest 10 trillion)
Applications of induction motor?
A single phase induction motor is mainly used in fans.It is capacitor start capacitor run induction motor.In three phase induction motor squirrel cage induction motor is mainly used in elevators,lifts,cranes.slip ring induction motor is mainly used in electrically driven ships.
The function of a start winding in a split-phase motor is to?
a start winding on a motor is used to add torque to start a motor, and more importantly to establish the direction that the motor will turn. to reverse a motor normally means to reverse the start winding. the run winding will work the same in either direction, the start winding determines the direction.
Generator Exciter is a new way for people to generate serial keys for pirated software for various companies. This is well known as something called a "keygen".
A lumped network is made of physically separated R,L and C elements.harjinder singh is made by
What is the advantage of an IGBT rectifier compared to an SCR?
An insulated-gate bipolar transistor (IGBT) uses relatively high frequency switching and pulse width modulation (PWM) technology for voltage and current regulation whilst a silicon controlled rectifier (SCR) uses relatively low frequency switching and phase shift technology.
Because of the relatively high frequency of operation, the transformers used in circuits having IGBT scan be much smaller in size and lighter in weight, therefore overall a IGBT-based power control circuit can be made much smaller in size, lighter in weight, more energy efficient and more cost effective compared to SCR-based control ciruits.
Apart from those advantages, because the cost of manufacturing IGBTs is now lower than SCRs, IGBTs are rapidly replacing SCRs for power control applications.
What is the definition of Sag current in transmission line?
sag means the deepest point of the conductor
AnswerSag is defined as follows: 'Sag, under any system of conductor loading, is the distance measured in the direction of the resultant load, between the conductor and the midpoint of a straight line joining adjacent supports'.
So, draw an imaginary line beween two adjacent supports (towers or poles) and, from the midway point, draw a vertical line to where it intersects the conductor, and that vertical line represents the sag.
What happens if there is a short circuit in a parallel circuit?
Incorrect answer
Then only one of the lights go out.
Correct answer
Actually ALL the lamps will go out if a short circuit occurs across any branch of a parallel circuit because, if the wiring has been done correctly, a circuit breaker will trip or a fuse will blow to cut off the supply of current to all the lights.
The loss of a single lamp indicates a break, not a short circuit.
Hi,
Known -
L=5 cm, N=200 turns, µr=300, µo=4π×10(-7)H/m, d=1mm=1×10(-3)m
A=πD²/4=7.85×10(-7)m²
Unknown -
flux density--->B=?
current--->I=?
Formulae -
Φ=BA; Φ=NI/R ;R=L/µA (reluctance);(Φ-magnetic flux);
By substitution-
BA=NI/R
B=µNI/L
B=µoµrNI/L= 1.501×I Tesla
substitute the numerical value of I to get the answer.
Regards
∞
series
So this means there's 120 Mechanical Engineering students, 360 Chemical Engineering students and 720 Electrical Engineering students. Is there a point to this question?
I think No.
as a motor armature speed increases,the net current in the motor windings decreases due to MAGNETIC DRAG. which is a common phenomenon in the ac machines.
A watt hour is a unit of energy, not time -so you cannot ask how 'long' it is. The time taken to consume a watt hour of energy depends upon the rate (i.e. the power) at which it is consumed, expressed in watts. A watt hour is defined as the amount of energy consumed, over a period of one hour, at the rate of one watt.
Advantages of Delta connections in Transformers?
1. A three phase transformer with HV side star connected and LV side delta connected results in economical design.
2. However, if star winding is required on the LV side due to load / safety requirements, then it is common to connect the HV side as delta. See next item to know why a delta winding is necessary.
3. Delta winding provides a path for third harmonic current present in the magnetising current due to core saturation. Hence, delta winding acts a thrid harmonic filter. This will help to eliminate non-sinusoidal voltage on transformer load terminals. This is an important feature of transformer design. Hence, in practice, all transformers will invariably have a delta winding.
Difference between bilateral and unilateral tolerance?
Unilateral Tolerance :- A tolerancing method using a deviation in only one direction, either plus or minus, from the specified dimension Bilateral Tolerance :- A tolerance method using an equal plus and minus deviation from the specified dimension.
Speed control of three phase induction motor by supply voltage control using AC voltage regulators?
No. Use standard utility AC, 3 PH voltage to feed a Variable Frequency Drive (VFD). The VFD is then wired to the motor. The output of the VFD varies average voltage and frequency in a semi-constant proportion to keep Volts/Hertz ratio the same to the motor. The operator can then adjust or select the desired speed from the VFD and the VFD will run the motor continuosly at that desired speed. If you were to control only voltage to the motor without adjusting frequency in proportion, the motor would burn up.
It is a isolator where the three pole phases are aligned digonally ie. all the pole phases are connected one behind another so that the jumpering can be done on the bus bar.
