Is 110V AC safer than 220V?

As for the so-called "spike voltage" I think it varies from person to person, from environment to environment, no one can say that below 36V is absolutely safe, how much V or more is absolute spike (if you say 100,000 volts or 1 million volts is absolute spike, then I can only agree). If I say 110V is safe, I just mean that it is relatively safe, or relatively safe. Neither 110 nor 220 is absolutely safe for people.

Expanding a little, I remembered the statement I had heard before about the lethality of knives, some people said that the lethality of a knife is 200, and the lethality of a knife B is 180, so a knife is better than a knife B, but the problem is that for people, the lethality of more than 36 is enough to be deadly. Coming back, so I think it's safe to use both 110 and 220 as long as the security measures are strong and used in the nominal range. Otherwise, it's not safe.

Twice as low as the voltage for the same power, twice as much current. Therefore, it can be seen that the service life of the equipment made of the same material will be relatively long, because the voltage is low, and the relative dielectric strength is high. We also know that the higher the current, the greater the current loss during use.

So to sum up: 200V is more economical, 100V is safer. I saw that the questioner added a second person's question.

How much voltage can electrocute a person depends on how big the person's resistance is, and the resistance of the human body depends on many environments and human body conditions, so this zero cut-off value is not easy to judge. In addition, if you want to electrocute directly, you need to meet the following conditions:

1.The voltage should be higher than 36V

2.The input human body power is sufficient.

3.It can form a closed loop <>

When the nominal voltage is 220V, the appliance works at 110V, it will definitely not work properly. As for whether it will be damaged, it depends on the specific appliance.

When the voltage drops by 50%, the incandescent lamp can only emit a yellow-red dim light; The fluorescent lamp should not be ignited because its tube cannot be penetrated; As for the LED lights, I did a test and almost none of them emit light, but some barely emitted light, and the light intensity was dim and unstable.

Introduction

Suppose the abscissa x is the current or voltage. When the value of x rises from zero to xf, the relay will not act. When the value of x rises to x1, the relay engages. However, in order to ensure a stable engagement, it is necessary to allow X to rise to XD.

After the relay is engaged, we drop the x value. When X drops to X1, the relay is still engaged. When the x-value drops to xf, the relay is released.

In general, for a voltage pick-up relay, the pick-up voltage is 70% of the rated voltage and the release voltage is 40% of the rated voltage.

、About the aboveWhat happens if the 110V appliance is connected to 220V electricity? It is advisable to advise this 110V appliance that it is better not to be directto 220V electricity,Otherwise there is a chance that you will put thatThe 110V device is brokenIf you have to put it110vElectrical appliances are connected220v,Before you take it, take it first110vThe power input inside the appliance can be modified to be safe to use220V power supply too.

In this case, electrical appliances will be damaged due to overvoltage, of course, some wide voltage electrical appliances can be used, and they must be clear before connecting to avoid losses.

Once the appliance is made, its operating voltage is fixed. Some electrical appliances have a wide electrical voltage, such as energy-saving lamps, and the working voltage range is between 160 and 240 volts. If your electrical appliances are brought back from a foreign country and the working voltage is 110 volts (like some countries in Eastern Europe), you must not supply them with 220 volts, otherwise they will burn out.

It can be used with a power transformer to reduce the voltage from 220 volts to 110 volts.

The voltage of the difference of a full double will definitely burn out the electrical appliances, and now we have almost no domestic 110 electrical appliances.

What is the difference between 110v and 220v? The differences between 110V and 220V are as follows: 1. The cost is different

The voltage of 220V has less loss in long-distance transmission, which can effectively reduce energy loss compared with 110V, and the cost of electricity is lower. 2. Different cross-sectional area of wires: transmit the same amount of electricity, and in the case of the same transmission loss, the cross-sectional area of the wires used for 220V voltage is twice as small as that of 110V, which can save wire metal materials.

The biggest difference between 110V and 220V is the voltage. @2019

Summary. Hello dear:

Not necessarily. Whether a 220V appliance can be used for 110V depends on the allowable input voltage range of the appliance design.

Please pay attention to the rated input voltage range indicated on the nameplate and the manual, if the input voltage range includes 110V, it can be used with 110V power supply.

Electrical appliances are suitable for use at rated voltages and have the greatest economic benefits during normal operation. At this time, all components in the equipment are working in the best state, the performance is relatively stable, and the service life is relatively long.

Extended Materials. Rated voltage.

The rated voltage refers to the optimal voltage when the electrical equipment is working normally for a long time. When the working voltage of the electrical equipment is higher than the rated voltage, it is easy to damage the equipment, and when it is lower than the rated voltage, it will not work normally (such as the bulb glows abnormally, the motor is abnormal.

Can a 220V appliance be directly applied to a 110V voltage?

Hello dear: Not necessarily. Whether a 220V appliance can be used for 110V depends on the allowable input voltage range of the appliance design.

Please pay attention to the rated input voltage range indicated on the nameplate and the manual, if the input voltage range includes 110V, it can be used with 110V power supply. Electrical appliances are suitable for use at rated voltages and have the greatest economic benefits during normal operation. At this time, all components in the equipment are working in the best state, the performance is relatively stable, and the service life is relatively long.

Extended InformationRated voltageThe rated voltage refers to the optimal voltage when the electrical equipment is working normally for a long time. When the working voltage of the electrical equipment is higher than the rated voltage, it is easy to damage the equipment, and when it is lower than the rated voltage, it will not work normally (such as the bulb glows abnormally, the motor is abnormal.

The rated voltage of the specified electrical equipment is conducive to the production standardization and serialization of the electrical appliance manufacturing industry, the standardization and selection of design, the interconnection and replacement of electrical appliances, and the production and maintenance of spare parts. In addition, in order to avoid the unlimited expansion of the number of voltage levels, which leads to the difficulty of interconnection, it is necessary to standardize the rated voltage of the power grid, and in order to achieve the best technical and economic performance, power equipment needs to be optimally designed, manufactured and used at the rated voltage.

The above is mine, I hope it will help you, I wish you a happy life, thank you dear.

Common values: 1. The voltage induced by the TV signal on the antenna is about.

2. Maintain the voltage of the human biocurrent.

3. The nominal voltage of alkaline batteries.

4. The voltage for human safety is generally not higher than 36V

5. The voltage of the home circuit is 220V

6. The voltage of the power circuit is 380V

Why does the United States use a voltage of 110V, while China uses a voltage of 220V?

110 V is closer to a safe voltage, and people in developed countries have more money and are more demanding. There is also the fact that you buy a 110V electrical appliance and you can't use it, and you have to burn it as soon as you use it. The laptop charger is fine, with a wide voltage of 100-220V, it can be used anywhere.

I also wanted to know the answer, after reading your rhetorical question, I think I know a little more than you, only a little bit of the version, the extra right is that you regard the wire as a resistor, and the electrical appliance as a resistance (for the time being, the motor is regarded as a pure resistance with its own capacitance compensation), is it possible to find that in order to meet the sufficient power of the electrical appliance, the lower the voltage, the more power will be occupied by the wire, and the high voltage can effectively reduce this loss.

The higher the voltage bai, the better, just like high.

DU voltage transmission is the same. According to p=ui, power one.

When the DAO is determined, the larger the voltage, the smaller the current return; According to Joule's law q=i2rt, p=i2r (note that it is the square of the current), the smaller the current, the less heat will be generated. The less energy is lost on the wire, the more economical it is.

V is less suitable for electrical appliances in China, and it is much more expensive than that, and there is no difference in electricity consumption.

The difference between voltage 110v and 220v is:

The power consumption of V transmission is small, and it can effectively reduce energy loss compared with 110V, which is the same principle as the ultra-high voltage transmission point.

2. Transmit the same amount of electricity, in the case of the same transmission loss, the cross-sectional area of the wire used by the 220V voltage is twice as small as that of 110V, if the lines of the whole China are combined, then the 220V voltage is better than the 110V voltage I don't know how much copper and other metals are saved.

4. In the case of the same power, the smaller the voltage, the greater the current; For some countries that use 110V and 120V voltages, the protection of electrical appliances focuses on fire prevention; For China and other countries that use 220V voltage, the focus of protection of electrical appliances is electric shock. Theoretically, the higher the voltage, the smaller the loss on the limb segment, and the lower the voltage, the safer.

Differences:

If the frequency of electricity is the same, for example, 50Hz can be used normally, but if the frequency is different, for example, the electricity in some countries in Southeast Asia is 230V 50Hz single, so it cannot be used, the heating is very fast, and the possibility of burning out is greatly increased.

If an appliance with a rated voltage of 220V is connected to 230, the temperature is estimated to be very high. For example, the higher the voltage of the incandescent lamp, the greater the current, the greater the power consumption, the higher the voltage when the motor load is unchanged, the current decreases, so that the resistance of the motor coil consumes less electric energy, and the electricity consumption is reduced.

Comparison of 220V voltage vs 110V voltage:

1. Under the condition of constant resistance, the lower the voltage, the greater the current, and the wire is easy to heat. If the wires are not thickened, it is easy to cause fire. Therefore, 110V power lines and electrical appliances need to have a smaller resistance, which consumes a lot of copper.

With the rapid development of the power industry, high-voltage transmission is generally used for long-distance transmission in various countries, often tens of hundreds of kilovolts, in order to reduce the current and reduce the loss of wires. From this point of view, although there are some gaps in energy conservation and environmental protection between countries using 220V and countries using 110V, after all, long-distance transmission is carried out by high-voltage transmission, so this gap is actually very small.

2. Security.

In dry conditions, 36V is considered a safe voltage, and in harsh environments, the safe voltage drops to 24V or even 12V. In the event of an electric shock, the real determination of safety is the amount of current that passes, so whether there is a danger depends more on the electric shock environment.

In principle, the lower the voltage, the safer it is. Someone has calculated that in terms of the time to produce pathophysiological reactions and even fatal hazards to the human body, 110V does take longer than 220V, a difference of about 100 milliseconds. But in reality, both 110 volts and 220 volts are well out of the safe voltage range.

The relatively low voltage of 110V is already three times higher than the safe voltage.

3. Applicability.

Ordinary electrical appliances belonging to the same voltage system are brought abroad for use, and the voltage is generally not a problem, because most electrical appliances have a voltage fluctuation range of 20%. Such as electric stove, electric Jianchang liquid rice cooker. Even in Japan, the voltage can reach up to 250 volts.

We brought the 220v electric stoves to the 230v voltage area to use them, no big problem, just to make them heat up faster.