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A circuit breaker doesn't respond to excessive voltages, but to excessive currents (overcurrents). A miniature circuit breaker, the type you have at home, has a bimetallic strip and a coil, either of which will initiate a trip in response to excessive temperature (overload currents) or excessive magnetic flux density (short-circuit currents).
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Q: How does a circuit breaker know that the voltage is high or low and trip off?
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What must you know before you change a circuit breaker?

Before you change a circuit breaker it has to be established that the breaker is at fault and not some other part of the circuit.


Can some body show me Electrical circuit diagram of Molded case circuit breakers?

Circuit breakers do not have circuit diagrams. The breakers have an input where the distribution voltage is applied and an output where the load is applied. If you want to know what is inside a breaker, the electrical terminology to use is "shop drawings" of the specific breaker that you need information on.


What Type of equipment of circuit breaker?

Well from my experience , i know that the equipment used for testing is called, Electroclysis Differentiator with a Dicasidace Robinium resistor.


How will you convert a open current circuit to a open voltage circuit?

The first thing you need to know is the internal resistance of the current source, the voltage source will have the same internal resistance. Then compute the open circuit voltage of the current source, this will be the voltage of the voltage source. You are now done.


How the voltage circuit work?

i.e normally we have various sensors to measure the voltage but my doubt is, how the voltage circuit measures the voltage i.e i need the detail for each and every unit.... If anybody know means plz tell to me.....

Related questions

Why scr is used in ac or dc voltage regulator?

The only use of an SCR in a powersupply regulator that I know of is a Crowbar protection circuit to force the breaker to pop if the regulation fails and the powersupply output voltage rises too high.


What must you know before you change a circuit breaker?

Before you change a circuit breaker it has to be established that the breaker is at fault and not some other part of the circuit.


Can some body show me Electrical circuit diagram of Molded case circuit breakers?

Circuit breakers do not have circuit diagrams. The breakers have an input where the distribution voltage is applied and an output where the load is applied. If you want to know what is inside a breaker, the electrical terminology to use is "shop drawings" of the specific breaker that you need information on.


Why do you need to know voltage of a breaker?

Breakers and other electrical equipment are rated in voltage so you know what voltage they can withstand. The breaker could fail and start a fire if you apply a higher voltage than it is rated for. Breakers are actually rated in amps (current in excess of this will trip it), interrupting rating (how many amps the breaker can handle during a short circuit) and in volts (is the difference of potential or the pressure that is pushing the current). The breaker I am looking at is rated for 15 amps, 10,000 amps interrupting rating and 120/240 volts.


How do you measur voltage in a circuit?

Place a voltmeter across the two points in the circuit you want to measure, and measure it. Be sure to know the expected voltage so that you can take appropriate safety precautions, and know the impedance of the circuit so that you can choose a voltmeter with a high enough internal impedance that it will not significantly affect the circuit.


Will a circuit breaker be the cause of an air conditioner not turning on?

It is possible if the circuit breaker has tripped or is faulty. The best way to check is by unplugging the air conditioner, and plugging in a table lamp. If the lamp lights up, then you know that the circuit breaker is working, if not then it is faulty.


Can i use a circuit breaker with 420V nominal voltage in 520V line voltage nominal current of circuit breaker is 1600A if I can how much current can pass from this circuit breaker?

NO! NO! NO! The circuit breaker must be rated for the line voltage used. Exceeding this limit can cause catastrophic failure! If you are really working on a 1600A bus, stop right now, ang go hire a professional! Your question indicates you are not qualified to work on this gear. YOU ARE GOING TO KILL SOMEBODY. I'm not kidding about this. A breaker that is applied beyond its rating can arc over, and the resulting arc-flash can punch right through the panel cover, spraying vaporized metal on anyone unfortunate enough to be standing there. A 1600A bus can have a fault current of 20,000A OR MORE. This is not something to even think about working on unless you are trained and absolutely know what you are doing!


Should 25 amps breaker be replaced by 20 amps?

For typical residential house wiring 12 AWG wire is required for a 20 Amp breaker. If you change out the breaker for a 25 A breaker you would have to rewire the circuit with 10 AWG. In that case you could up the breaker to 30 Amps. All outlets and switches should be rated at the same voltage and current as the breaker.


How do you know if your circuit breaker is faulty?

A breaker can fail in the following ways: 1. It doesn't trip when there is a current over the rated value. 2. It trips on a current that is substantially be low the rating. 3. It doesn't supply the correct voltage. 4. It supplies no voltage. For 1.) If you had a dead short and the breaker didn't open, then the main breaker would likely trip and damage could be done to anything on the circuit. 2.) You would have to calculate or measure the lower current that was causing the breaker to trip. If it were lower than the rating the breaker should be replace. 3.) This happens when the contacts within the breaker become worn or corroded or don't make good contact. You can measure the voltage with a volt meter and diagnose. Replace if this is the case 4.) Same as 3, but it is likely a mechanical problem keeping the breaker from closing at all.


When was first air circuit breaker launched?

i dont know ask your family


How will you convert a open current circuit to a open voltage circuit?

The first thing you need to know is the internal resistance of the current source, the voltage source will have the same internal resistance. Then compute the open circuit voltage of the current source, this will be the voltage of the voltage source. You are now done.


What Type of equipment of circuit breaker?

Well from my experience , i know that the equipment used for testing is called, Electroclysis Differentiator with a Dicasidace Robinium resistor.