3-phase 3 wire meter, Electrical Engineering

Assignment Help:

3-Phase 3 Wire Meter

A 3-phase 3 wire meter has 2 elements of each category on the other hand of 3 elements as in the case of 3-phase 4 wire meter. The primary principle of operation is the similar as that for 4 wire meter. The torque produced through 2 elements is equivalent to each other while power factor (P.F.) is unity. On the other power factors, the torques produced through the 2 individual elements is not equivalent and is of varying proportion. B phase element generator more torque at lagging power factors, although the R phase element produces more torque at leading power factor.

This particular feature could be made use of to search out the P.F. of the load current of the consumer for the reasons of checking at site. Power factors less than 0.5 are denoted through the reverse running of the meter along with only the R element in operation. Commonly, 3-phase 3 wire meters are not used in recording consumption of LT power consumers for the simple purpose that the lighting load has to be properly connected on one of the phases R or B.  Or else, if it is connected on the Y phase, where no current coil is provided, energy consumption would not get recorded.


Related Discussions:- 3-phase 3 wire meter

Moving coil transducers, Note transducers  convert a physical quantity from...

Note transducers  convert a physical quantity from one  form to another.  The case below illustrates a typical moving coil meter   that   converts   a   current into a mechanical a

The cross-sectional area of a wire of the same length, Some wire of cross-s...

Some wire of cross-sectional area 1mm 2 has a resistance of 20Ω. Determine: a)  The resistance of a wire of the same length and material if the cross-sectional area is 4 mm 2 .

Mid band voltage gain, For the amplifier circuit shown below estimate the m...

For the amplifier circuit shown below estimate the mid band voltage gain if the EARLY voltage (V A ) of the current mirror transistors is 80 volts.  Assume the d.c biasing is optim

Draw a schematic diagram of transformer connections, Q. Three single-phase,...

Q. Three single-phase, 10-kVA, 2400/120-V, 60- Hz transformers are connected to form a three- phase, 4160/208-V transformer bank. Each of the single-phase transformers has an equiv

Explain frequency response curve of a rc coupled amplifier, Q. Explain the...

Q. Explain the frequency response curve of a  RC coupled amplifier The frequency response curve of a typical RC coupled Amplifier is shown below: In mid frequency range

Merits and demerits of fixed bias with emitter resistor, Merits: The ci...

Merits: The circuit has the trend to stabilize operating point against changes in temperature and β-value. Demerits: In this type of circuit, to keep I C  independent o

Sketch the phasor diagram of the voltage, Q. The line-to-line voltage of a ...

Q. The line-to-line voltage of a balanced wye connected three-phase source is given as 100 V. Choose V AB as the reference. (a) For the phase sequence A-B-C, sketch the phasor

Find the new direct transfer gain, A voltage amplifier without feedback has...

A voltage amplifier without feedback has a nominal gain of 500. The gain, however, varies in the range of 475 to 525 due to parameter variations. In order to reduce the per-unit ch

Squeeze castings, Squeeze Castings: Squeeze casting, also known as ...

Squeeze Castings: Squeeze casting, also known as liquid metal forging, is a combination of casting and forging process . The molten metal is poured into the bottom half

Compute the starting torque with the starting compen sator, A three-phase, ...

A three-phase, 2200-V, 60-Hz, delta-connected, squirrel-cage induction motor, when started at full rated voltage, takes a starting current of 693 A from the line and develops a sta

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd