Answer / dhakshinamoorthy

1.) Air Circuit Breaker
2.) SF6 Circuit Breaker
3.) Vacuum Circuit Breaker
4.) Oil Circuit Breaker
5.) Air Blast Circuit Breaker

Answer / eee guy

There are different types of circuit breakers based on the
arc quenching medium used.
1. Oil circuit breaker
2. Air-blast circuit breaker
3. Sulfer hexaflouride circuit breaker
4. Vacuum circuit breaker(no medium)

Answer / sanjayjssate

Depending upon arc quenching method they are for types

Air cb
Vaccum cb
Oil cb
SF6 cb

Answer / prashant

With the above answers, i need to add

1)MCB- Miniature circuit breaker
2)MPCB- Motor protection circuit breaker
3)MCCB- Moulded case circuit breaker

Answer / vaibhav

1 Air circuit breaker
2 Vaccum circuit Breaker
3 Oil circuit breaker
4 SF6 circuit breaker
5 Air blast circuit breaker
6 Minimum oil circuit breaker(M.O.C.B)

Answer / swethareddy

SF6,AIR,VACCUM,OIL

40 HP motor how many square mm size wire use for stator to motor & aluminium wire use ?

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Do Phase angle measurement have any application in freq/harmonics measurement? If so how?

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What is main cause of cable's terminal point burned in Lug on high temperature although lug and cable selection is ok as per stantard and also tightness is ok as per situation. so please take in deep and tell correct answer thanku.

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how many types of accuracy class in ct? what is meaning of 5p20?

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Give the topology of current amplifier with current shunt feedback?

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Energy metering: On the property I am renting, the supply voltage is 2 x 110 volts. These 2 x phases enter a energy meter which then exit the meter to over head lines to my house. Question 1. The meter is single phase 240 volts but is being used as 2 x phase(2 x 110volt), is this acceptable? if not, please give me the reasons. The meter details are as follows: 60Hz 15amp Imax 100 amp Kd 3,6 Wh/R 1 fase 3 hilos Model FX 231. I think it was manufactured in Brasil From this meter, the cables run along over head aluminum conductors,I estimate the cross sectional area to be 25mm diameter, but the neutral is only about 10mm square diameter, which cover a distance of 170 meters and then terminate with an underground cable of 65 meter length, total length = 235 meters. There must be a huge voltage drop over this length. This line is protected with 2 x 200 amp aluminum fuses after the meter, there is no main switch in the distribution board. These 2 phases connect directly onto 2 busbars. Surely the neutral should be the same size as the conductors if not more? Question2. What are your thoughts about this installation, should there be better protection, is the neutral too small? During the night, the lights dim then brighten all the time, this cannot be good for my electrical appliances. In my home, I only have a small electric geyser and fridge, my stove works off gas. But when i use other appliances like the washing machine or microwave oven, the light dim. The internal wiring of this house is done with solid hard drawn copper wires and of course, they have to be under rated. I am a retired electrician by trade, but not on the metering and over head mains side, my experience is on the factory maintenance side of things. Your expertise on these matters will be greatly appreciated. Please inform me how to rectify or make any improvements Kind regards, my power bill is very expensive, so I need to know how to bring it lower. Kind regards, Brian

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Whether IP65 enclosure box blocks ventilation if driver for LED have to enclosed inside IP65 box

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How line capacitance & line inductance varies with increase in height tower.

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What is speed mode?

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one kva is equal to how much amps?

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what is different between neutral and earth?

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