There was a light bulb that said 220V 15W, but it kept burning

The resistance is more than 300 ohms, but the resistance is calculated from the nameplate is more than 3000 ohms" This value is very normal, the temperature has a great impact on the resistance, the normal working temperature of the bulb is thousands of degrees, the resistance is more than 3000 ohms, and the room temperature measurement with a multimeter is 300 ohms, and the normal temperature resistance of the bulb is generally one-tenth of the normal working resistance, so the bulb is no problem.

The voltage of the bulb will exceed 220V to reach 250V in the middle of the night, at this time it is easy to burn, so try not to use the bulb in the middle of the night, if you need to always turn on the bulb, it is recommended to buy two 40W bulbs in series to use, which can ensure a long time of work, although the brightness effect may be a little worse.

The 220V and 15W written on the bulb refer to the rated voltage and rated power values when emitting light normally, and the resistance corresponding to normal light emitting is about 3000 ohms (ohms).

Since the bulb is made of tungsten, its resistance is much smaller than that of more than 3,000 ohms (about 1,000 ohms) when it is not energized (cold).

When you say "old burning", you mean that it is often burned, then it may not be the problem of the bulb, but the voltage of the circuit is much larger, you can measure the voltage to see.

The cold and hot state of the filament resistance of incandescent bulbs are different, when you measure with a multimeter, the filament temperature is only a few tens of degrees Celsius, and when working, it can be as high as 2000 degrees Celsius, and the resistance changes several times to more than ten times. Specifically, search for the keyword "temperature coefficient of resistance".

The bulb is often damaged due to poor quality, such as insufficient vacuum, impurities in the filled gas, uneven filament thickness, uneven pitch, poor surface treatment, etc. It is recommended to change to a better brand of bulb.

Change the brand. Replace the lampholder, is not aging, poor contact.

Measure the voltage, not that there is a problem with the power supply voltage.

If your home circuit is always burning appliances or light bulbs, there may be one of the following reasons:

1.Circuit aging. If your home circuit has been in use for a long time, the aging of the circuit may cause short circuits or other problems in the circuit, causing electrical appliances or light bulbs to overpower.

2.The line is overloaded. If the power of the connected appliances exceeds the maximum power that the line can withstand, it will cause the line to be overloaded, which in turn will burn out the appliance or light bulb.

3.Voltage issues. If the voltage in your home is unstable, fluctuating too much may also cause appliances or light bulbs to burn out.

4.The appliance itself. Problems such as unreasonable design and poor manufacturing of electrical appliances may lead to electrical failure.

Solution: You can contact a reputable electrician to check the circuit and restart the power, or replace the faulty appliance or light bulb, so as to ensure the normal operation of the appliance in your home. It is recommended to avoid overload as much as possible, make reasonable use of household appliances, and protect home appliances from failure.

There are many factors that burn the bulb, 1The voltage is unstable, sometimes high and sometimes low, whether there is interference from high-power equipment near the outside world.

2. Poor line contact.

Check whether the switch and lampholder are aged.

3. For bulb quality problems, use regular 3C certified products.

4. Use environment and other undesirable factors.

Are you using a light bulb or an energy-saving lamp How many watts?

There are three possible reasons why light bulbs are burned out:

1: The voltage is unstable;

2: The quality of the bulb;

3: The lamp head is a little loose (poor contact).

It is possible that your situation is due to poor contact at the lamp head.

Summary. Hello, glad to answer for you. <>

The reasons why the 220V line shows that more than 1,000 volts of the lamp burned out: 1. The voltage on the power line exceeds the standard 220V, which causes the lamp to be unable to withstand the excessive voltage, thus burning out the bulb or lamp. 2. The voltage on the power line exceeds the standard 220V, which causes the lamp to be unable to withstand the excessive voltage, thus burning the bulb or lamp.

3. The power line may have problems such as aging cables, loose wiring, short circuits, etc., resulting in unstable voltage, which affects the normal operation of lamps and lanterns. 4. There are problems in the design or installation of the lamp itself, which causes the bulb to be easily affected by excessive voltage or excessive current, resulting in frequent burnout.

The 220V line showed that more than a thousand volts of the lamp burned out.

What exactly is the problem of pro? Can you describe your problem in detail? Tell the teacher in detail so that the teacher can better help you.

Hello Xinso, I am happy to answer for you. <>

The reasons why the 220V line shows that more than 1,000 volts of the lamp burned out: 1. The voltage on the power line exceeds the standard 220V, which causes the lamp to be unable to withstand the excessive voltage, thus burning out the bulb or lamp. 2. The voltage on the power line exceeds the standard 220V, causing the lamp to be unable to withstand the excessive voltage, thus burning the bulb or lamp.

3. The power line may have problems such as aging cables, loose wiring, short circuits, etc., resulting in unstable voltage, which affects the normal operation of lamps and lanterns. 4. There are problems in the design or installation of the lamp itself, which causes the lamp to be easily affected by too high voltage or excessive current, so that it burns out frequently.

Summary. Hello, maybe the voltage of the power grid in your home is unstable or high, the normal voltage is AC 220 volts, if it is too high, the voltage is higher than 240 volts, then your home appliances are very dangerous, it is best to find an electrician to buy a suitable household voltage regulator. If the voltage of the power grid is unstable, and the voltage is high and low, then check whether the line has poor contact and find the problem as soon as possible, because it is very dangerous to check the electricity, and you must find an electrician to deal with it.

Hello, maybe the voltage of the power grid in your home is unstable or high, the normal voltage is AC 220 volts, if it is too high, the voltage is higher than 240 volts, then your home appliances are very dangerous, it is best to find an electrician to buy a suitable household voltage regulator. If the power grid voltage is unstable, the voltage is high and low, then check whether the line has poor contact, find a rock shelter to deal with the problem as soon as possible, because it is dangerous to check the electricity rough, you must find an electrician to deal with it.

Sometimes it burns and sometimes it doesn't, but the subrack is energized, the mobile phone charger burns seven or eight, and the bubble burns more than ten, alas, I died of depression.

It is recommended to test the voltage first, it may be that the voltage is unstable.

Oh, got it.

Generally speaking, the reason why the 220 volt does not short circuit often burns out the bulb is to remember the situation, first of all, it may be that the light plate is of poor quality, and it is possible that you are buying an inferior bulb. Secondly, it may be that the voltage is unstable, and the voltage instability is also a major reason for the bad inspection of the lamp, and finally the bulb is turned on and off frequently, which may also cause the bulb to be burned out frequently.

Summary. To solve this problem, we can take the following measures to solve it: firstly, we should check whether the power supply of the light box matches the voltage of the power supply, if not, we should replace the light box that matches the voltage of the power supply.

Secondly, to check whether the circuit of the light box is normal, if there is a problem with the circuit, you should check whether the wiring of the circuit is correct, if the wiring is incorrect, you should re-wire it to ensure the normal operation of the circuit. In addition, to check the circuit board of the light box for damage, if there is damage, you should replace it with a new one to ensure the normal operation of the light box. Finally, check whether the power supply of the light box is damaged, if there is damage, you should replace it with a new power supply to ensure the normal operation of the light box.

In short, in order to solve the problem of the light box burned out, first of all, check whether the power supply of the light box matches the voltage of the power supply, and secondly, check whether the circuit of the light box is normal, in addition, check whether the circuit board and power supply of the light box are damaged, if there is damage, the new circuit board and power supply should be replaced to ensure the normal operation of the light box.

In order to solve this problem, we can take the following measures to solve it: first, check whether the power supply of the light box matches the voltage of the coarse power supply, if not, the light box that matches the power supply voltage should be replaced. Secondly, it is necessary to check whether the circuit of the light box is positive, if there is a problem with the circuit, you should check whether the wiring of the circuit is correct, if the wiring is incorrect, you should re-wire it to ensure the normal operation of the circuit.

In addition, to check the circuit board of the light box for damage, if there is damage, you should replace it with a new one to ensure the normal operation of the light box. Finally, check whether the power supply type of the light box is damaged, if there is damage, you should replace it with a new power supply to ensure the normal operation of the light box. In short, in order to solve the problem of the light box burned out, first of all, check whether the power supply of the light box matches the voltage of the power supply, and secondly, check whether the circuit of the light box is normal, in addition, check whether the circuit board and power supply of the light box are damaged, if there is damage, the new circuit board and power supply should be replaced to ensure the normal operation of the light box.

Can you add, I don't quite understand it.

In response to this problem, the first thing we need to do is to check whether the wiring of the light box is correct, if the wiring is incorrect, then the wiring of the light box should be rewired to ensure that the wiring of the light box is correct. Secondly, we need to check whether the power supply of the light box is correct, if the power supply is incorrect, then we need to replace the power supply, and make sure that the power supply of the light box is correct. Finally, we need to check whether the circuit of the light box is correct, if the circuit is incorrect, then we need to re-check the circuit to make sure that the circuit of the light box is correct.

In addition, we should also pay attention to the installation of the light box, and the installation of the light box should be in line with the installation specifications to ensure that the installation of the light box is correct. In addition, we should also pay attention to the maintenance of the light box, and regularly check the power supply, circuit and wiring of the light box to ensure that the maintenance of the light box is correct. In short, the wiring, power supply, circuitry, and installation of the light box should be correct, and regular maintenance should be carried out to ensure the safety and reliability of the light box.