1. What is an ampere?

First of all, “ampere” is the international system of units to express the basic unit of current, can be expressed by the symbol “A”, if there is a constant current, this constant current in a unit of time through the cross-section of the conductor of the size of the electric quantity 1 coulomb, then this constant current The strength of the current is 1 ampere.

2. What is volt-ampere and how is it related to power?

Second, the volt-ampere (VA) is the unit of apparent power (i.e., this figure is derived from the product of voltage and current in a circuit) and is used to express the total electrical power in a circuit. Electrical power refers to the amount of work done by the current per unit of time, which is a concept that is often used in electrical equations.

3. What is the difference between a three-phase circuit and a single-phase circuit?

For three-phase circuits, because the voltage and current are distributed in three phases, the angle between each phase is 120 °, so the total power of the three-phase current is calculated as the vector sum of the power of the three phases, so that the calculation of the amperage in three-phase circuits need to take into account the relationship between the line voltage and the phase voltage is known to be the line voltage of the phase voltage √ 3 times.

Whereas for a single-phase circuit, since the magnitude of the current and voltage in the circuit does not change, and the line and phase voltages have the same value, it is only necessary to take the number of amperes in the circuit and divide it by the value of the voltage in order to get the number of amperes.

4. Volt-ampere to ampere calculation process

First clarify each physical quantity, current (I), voltage (V), apparent power (VA), voltage between the fire and fire wires (VL-L(V)), voltage between the fire and zero wires (VL-N(V))

For a single-phase circuit, the formula for converting volt-amperes to amperes is

I = VA/V

As an example, if a single-phase circuit has an apparent power of 400VA and the voltage in the circuit is 100V, then substituting this formula above gives 4A amperage in the circuit.

And for a three-phase circuit, the formula for calculating volt-amperes to amperes is

I = VA/(3 x VL – N(V)) = VA/(√3 x VL – L(V))

As an example, for a three-phase line with an apparent power of 1000VA and a voltage of 100√3V between the fire and fire wires, the amperage is 3.3A when substituted into the formula.

5. How to determine whether it is a single-phase line or a three-phase line?

The easiest way is to look at the power lines in the circuit. Single-phase circuits usually have two power lines, which you know as zero and fire, while three-phase circuits usually have three phase lines, which are used in many large-scale solar energy systems because three-phase circuits can provide higher power than single-phase circuits, and you can easily distinguish between the two types of circuits.

Of course, there is electrical expertise involved, so if you are unsure of the type of wiring in your home, you can find a professional who can accurately determine the type of wiring in your home so that you can use a volt-ampere to amperage calculator, which is a safer way to go.

6. Volts to Amps Calculator Benefits and Considerations

Volt to Amp calculator is an essential tool in your life that can help you simplify the process of calculating basic parameters such as the power of your devices. By getting to know more about Volt to Amp calculator, you can get to grips with this tool more quickly, and it can play an irreplaceable role in your life later on.

Not only is it important to make sure that your data is filled in correctly with a volt-ampere to ampere calculator, but it is also important that you choose whether you want to use a three-phase or single-phase circuit before you begin to fill in the data, as this will have a direct impact on the final result.