How To Choose A Voltage Stabilizer For Air Conditioning?

Everyone knows that summer is the peak season for electricity consumption. In many places, due to the lack of line transformation, the external network voltage is low and the air conditioner cannot start normally. At this time, the idea of ​​equipping a voltage stabilizer comes. Then the question is, how to choose Dynamic Voltage Regulator (DVR)? The following will analyze and explain it for you, hoping to help you solve the problem.

1. Calculate the power of the voltage stabilizer: The main load of the air conditioner is the compressor, so it belongs to the motor load. The current of the motor is very large when it starts instantly. Although many air conditioners are now frequency-controlled, the current is still very large when starting. Therefore, when equipping the voltage stabilizer, there should be a working margin. If the air conditioner is 2KW, the voltage stabilizer is equipped with a 6KW voltage stabilizer according to 3 times the power. How to calculate the power of the air conditioner? Generally, air conditioners have 1P, 1.5P, 2P, and 3P. 1P=0.75KW. You can calculate it according to this.

2. The power factor of the voltage stabilizer. At present, 80% of the voltage stabilizers on the market are 0.7, and 20% of the voltage stabilizers have a power factor of 0.8. What does it mean? That is, a 10KVA voltage stabilizer, with actual output power x 0.7=7KW

3. When using a voltage stabilizer in summer, it is mostly due to the low external network voltage. Therefore, when selecting a voltage stabilizer, you should pay attention to leaving a working margin. Generally, the actual load should not exceed 80% of the voltage stabilizer power. Why?

Let's calculate and you will know. When the external network voltage is 220V: 6000W/220V=27A (current), when the external network voltage is 170V: 6000W/170V=35.3A (current). After comparison, we can see that the current is larger when the input voltage is low, and the wire diameter of the transformer in the voltage stabilizer is fixed, and the current it bears at low voltage is much larger.

4. Calculate according to the above method: 2KW air conditioner X2 times = 4KW, here the air conditioner power is multiplied by 2 because the instantaneous starting current of the air conditioner compressor is large; 4KW/0.8=5KVA (power of the voltage stabilizer), divided by 0.8 here is the working margin of the voltage stabilizer, 5KVA/0.8=6.25KVA (power of the voltage stabilizer to be purchased), divided by 0.8 here is the actual load capacity of the voltage stabilizer is only 80%. That is, a 2KW air conditioner with a 6KVA voltage stabilizer is calculated in this way.