Công suất kVA là gì? 1 kVA bằng bao nhiêu KW – Eduboston

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To measure the capacity and capacity of the transformer, one must use the unit kVA to measure. So what is kVA, what is kVA power, what is the kva symbol and how to convert kVA to other quantities. Let’s learn about these issues through the following article!

Danh Mục Bài Viết

• What is kVA?
• kVA in practice
• What is the relationship between kW and kVA?
• 1KVA equals how many KW (1KVA = KW)
• 1KVA equals how many VA
  • Tham khảo thêm: Công suất kVA là gì? 1 kVA bằng bao nhiêu KW

What is kVA?

On electrical equipment you can easily come across the word kVA. So what is kVA unit? kVA stands for Kilo Volt Ampere in English. This unit represents the capacity of the current. So you can easily see it on electrical equipment and can know the capacity of that electrical device.

In an ideal circuit or a DC circuit, kVA is equivalent to kW. However, an AC circuit can appear reactive power, we understand roughly the following: kVA = kW + reactive power.

Hence, the power in kVA is equal to the sum of the useful power in kW and the interfering power. The formula for calculating kVA is:

S = UIcos(Ø)

In there:

S: Full power symbol

I: Amperage (A)

U: Voltage (V)

For an ideal circuit, the power factor cos(Ø)=1.

kVA in practice

Conditions for a transformer to work well must ensure the following two factors:

• The temperature of the core and copper windings of the transformer should not exceed the allowable insulation level.

• The transformer losses must always be within the allowable limits from the manufacturer. It is usually denoted Un% and is listed on the catalog.

From the above it can be seen that these conditions relate only to the current carried inside the transformer. Therefore, at low- and medium-voltage nodes, transformers or on the nameplate of generators usually record the capacity in mVA or kVA.

Each transformer provides different voltage corresponding to each different current will transmit the actual power also different.

We also need to understand that the quantity kVA including kW is the real energy, which is the amount of electricity that businesses and people need to use, and kVar is the reactive energy, necessary for inductive loads.

What is the relationship between kW and kVA?

Nowadays people only care about the actual amount of electricity in kW, but they don’t know that when calculating the total energy in the electricity industry, it is in kVA.

The formula for calculating transformer capacity is as follows:

P = UI Cost

In there:

P: Power, unit is VA

U: Voltage, unit is V

I: Amperage, unit A

Phi: The angle of phase difference between the voltage and current difference through the power consuming device.

For households, the electricity they have to pay every month is the actual amount of electricity in kilowatts. So to see what is a motor with a capacity of 1 kVA and a power factor of cos phi = 0.8, the power consumption will be 0.8 kW.

From there, the relationship between the apparent power kVA and the actual power kW is: kW = kVA x cos phi.

Normally cos phi ranges from 0.2 to 0.9, so 1 kVA = 0.2 to 0.8 kW (depending on manufacturer’s specification).

See also: Convert 1 foot to how many m, cm

1KVA equals how many KW (1KVA = KW)

Active power is P= UICos (kW)

The apparent power is S =UI (kVA)

Between these two power will be different: P = S. Cos Ø equivalent to kW = kVA, Cos Ø

=> 1kW = 1kVA . 0.8 or 1 kVA = 1 kW / 0.8.

Convert kVA Units:

1 KW = 0.8 kVA

1 kVA = 1.0723860589812333 HP

Also to calculate 1 kVA by how many W, KW, Ampere, VA you can use google. To calculate kVA to KW, W,… or other units you just need to type in google search bar: “kVa to KW” or “kVA from KW”, “kVA to kWH”, “KW to kVA”. Results will appear immediately on the first line of the front page.

1KVA equals how many VA

In a DC circuit, VA will be equivalent to Watt. But in AC current, VA is often used to calculate the apparent power, and Watt is used to calculate the real power. In the same AC circuit, the apparent power is often larger than the power. real.

When we add the SI prefix, we have the following units:

kVA = 1,000 VA

MVA = 1,000,000 VA

Above is some information about KVA, hopefully this will help you understand what kVA is and how to convert this unit to other units. Hopefully, this article will be useful and serve you in your work.

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Tham khảo thêm: Công suất kVA là gì? 1 kVA bằng bao nhiêu KW

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