What should I do if the voltage is high at home, can I string resistors? 20

Attaching the physical voltage to the voltage, as the pressure of the pressure-like, the accumulation of water, makes the direction of flow, and then, by moving in a certain direction makes the electron the physical conductor on the top of the voltage, it can simply be understood that this is a new (and perhaps not new) and we must learn to go, and the best way to learn is to communicate with each other's interests as well, to be able to understand it! The relationship between voltage, current, resistance is Ohm's law voltage = resistance * current current = voltage resistance resistance = voltage current. Note that in this formula is to say that "the common error with the voltage resistance proportional to the two conductors, contrary to the current," this statement is false, the resistance is the conductor itself, and only the inherent properties of the material, temperature (in high school come into contact with them), not the voltage, current, often occurs in multiple choice questions this problem, be careful!

The method is completely feasible, but in order to save electricity, you can calculate the maximum voltage at 230V, so that there is no problem with electrical appliances.

Another point is that a few hundred watts don't have much effect on heating and heating, and in summer, have you considered it?

I think your solution is good, but considering the economic factors, there are other electrical appliances that need to be used, and the power consumption is very large. It is recommended to report to the relevant local departments for resolution.

If the voltage at the bus end is too high, the transformer tap needs to be adjusted. If the end is too high, a reactive power adjustment device needs to be added.

1] When the voltage of the AC contactor coil is too high, the series resistor cannot be used to reduce the voltage.

It's better to buy a transformer.

At the moment when the AC contactor is engaged, the coil current is very large, and if you connect the resistance in series, it will hinder the contactor from attaching, which will be eventful.

It is even more troublesome if there are multiple contactors.

You string a voltage divider resistor!

CMD introduces voltage divider resistors.

California Micro Devices (CMD) offers thin-film divider resistor arrays with tight ratio tolerances (25ppm) and a wide range of resistance values from 10 ohms to 10 megaohms. The PRN105 is available in an SOT-23 package, which saves board space. The device has high stability, low noise (-25dB) and reliable tantalum nitride characteristics.

The array can meet the voltage divider requirements of many wide-range resistance products, such as gain control of operational amplifiers, voltage setting of voltage regulators, attenuation and level migration of interface TTL and MOS.

The string is the current constant, and the resistance value of the voltage divider you measure multiplied by the selected voltage divider is the voltage that is shared.

You go and buy a 380--220 transformer and connect the 380 to the 220 voltage 220 termination contactor (127).

If it's still high, you will connect the contactor to the 160V end, I don't understand, it looks like you're a little dizzy, or I'll send you a picture.

The conditions you gave are not right! According to the 100V50 ohms of your electrical appliances, the current used is 2A. You can get a string of 60 ohms of resistor!

The formula is: (thousand ohms) = 220V (using voltage) - 100V (electrical voltage) 2000mA (electrical current MA). But it's better to use a larger resistor power and resistance value!

Because your current is not small. It is recommended that you use a 100 ohm 20 watt ceramic resistor to give it a try!

The size of the resistance in series is related to your load, taking the pure resistive load as an example, the electrical appliance is 100 volts and the resistance value is 50 ohms, and if you want to connect to the 220 volt power supply, you must connect a resistor that can share 120 volts of voltage, that is, 60 ohms, note that its wattage must be greater than or equal to the wattage of the electrical appliance, and the principle of using a bulb in series is the same.

In fact, it is the same, the voltage is the cause of the current, and when the size of the series resistance changes, the voltage at both ends of the resistor also changes, and the current in the entire circuit also changes at the same time. So you say change the current, okay; You say change the voltage, it's fine. can protect the circuit.

Can the problem be clearly described, such as what the circuit looks like, whose voltage it is, etc.

For example, if the total voltage of a series circuit is constant, and the resistance value of one of the resistors increases, the total current will decrease, resulting in a decrease in the voltage at the terminal of the constant resistor and an increase in the voltage at the terminal of the variable resistance (increased).

In series, the resistance is the load. The voltage on the resistor is the supply voltage.

Hello, if you connect a resistor in series in the same circuit circuit, you can step down the voltage, because the series resistor plays the role of voltage division.

No, it can only reduce the current.

The current of the contactor coil is 10 times that of the current after sucking and suction, and the simple series resistance is not possible, it is recommended to connect a 4-10UF 1000V capacitor in series, and connect the auxiliary normally closed contacts of the contactor at both ends of the capacitor, so that the coil will not be burned, and the power can be saved.

Working principle: under normal conditions, because the auxiliary normally closed contact of the contactor is connected in parallel with the capacitor, the capacitor does not work, so the coil is full pressure suction, when the contactor sucks and is finished, the auxiliary normally closed contact is disconnected, then the coil and the capacitor are connected in series, the capacitance is capacitive, the circuit at this time is equivalent to the series voltage divider circuit, and the voltage at both ends of the coil is not so high. The contactor requires very little suction and maintenance current, so the coil will not burn out.