Three phase voltage is too low with the regulator useful?-Longwei Electronic Technology_Source

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Three phase voltage is too low with the regulator useful?

Release time:

2024-04-25

Source:

Voltage instability can be solved with a voltage regulator, the answer is yes, the voltage regulator can solve the problem of low voltage. However, when purchasing a voltage regulator, it is necessary to test the voltage fluctuation value of the region. When purchasing a voltage regulator, the voltage regulation range of the voltage regulator must be greater than the voltage fluctuation value of the region.

What is the effect of low voltage on equipment?

Low voltage will reduce the capacity of power transmission and transformation equipment, reduce the charging power of transmission lines, cause large-scale power outages, shorten the service life of equipment, and even burn out electrical appliances.

When the voltage is too low (below 5%), the motor becomes shorter, and the voltage square relationship decreases, which makes the starting torque drop a lot, and the motor is difficult to start (slow or even not start);

Second, if the load of the running motor is constant (under heavy load or rated load), the rotor should maintain the necessary electromagnetic shortening to balance the resistance torque of the load.

This forces the rotor current to increase, causing the stator current to increase, causing the motor to overheat, increase the temperature rise, shorten the life of the motor, and even burn the motor.

There are many cases of low-voltage start-up operation of the motor, and the load should be reduced as much as possible or used intermittently. The motor voltage is generally allowed to fluctuate within the range of 10% ~-5%. If the power supply voltage is 380 volts, the motor is allowed to run for a long time between 418 and 36 volts.

Solution for low equipment voltage

1. In addition to thickening the incoming line, it is also necessary to check whether the power factor of the electrical equipment is relatively low, resulting in an increase in line voltage drop. If it is the power factor, reactive power compensation is good.

2. It can also carry out energy-saving transformation on some equipment and replace the motor efficiently. Energy-saving equipment consumes less power and can solve the problem of low voltage.

3. Install the three-phase automatic compensation power regulator, which is an automatic self-coupling adjustable transformer. This device can stabilize the insufficient voltage. Improved higher power compensation.

Is it useful to use a voltage stabilizer for low three-phase voltage?

One of the functions of the voltage regulator is to control the output voltage of the electrical appliance with large current fluctuations within a certain range, so as to ensure the smooth flow of the circuit and the normal use of the electrical appliance. Voltage instability can be solved with a voltage regulator, the answer is yes!

If the three-phase voltage is too low to exceed the voltage regulation range of the regulator, please use the end boost booster, the effect is better than the regulator, the regulator will protect itself when the three-phase voltage is too low, no output voltage.

The working principle of voltage stabilizer

How does the regulator work?

Principle Analysis of Single-phase AC Regulator Principle Analysis of Single-phase SVC Direct Voltage Regulator Point A is the input side of the single-phase regulator, and point B is the output side of the single-phase regulator In fact, this type of voltage regulator with direct voltage regulator is made of the principle of autotransformer. In the figure, the AN side is the input side of the autotransformer, and the BN side is the output side of the autotransformer. If the input voltage is higher than the output set point 220V, the autotransformer will work in the step-down state. If the input voltage is lower than 220V, the autotransformer will work in the step-up state (shown in the figure is in the step-down state)

Three phase voltage is too low with the regulator useful?

How does the regulator work?

Voltage regulator is used to adjust the circuit and control circuit, power supply for the machine to make it work normally, then we will look at the type and working principle of the voltage regulator. First of all, the principle of single-phase direct voltage regulator. Single-phase direct voltage regulator is composed of the principle of autotransformer. It should be noted that when the input voltage is set, if the output point is higher than 220V, the transformer will automatically work in the step-down state. However, if the input voltage is lower than 220V, the transformer will automatically work in the step-up state. This regulator is different from the transformer mainly in that the input point A can slide arbitrarily from 0V to 250V, so we can adjust the input point of the input voltage at any time to meet the constant voltage.

How to know the price of the regulator

We in the process of electricity, more or less will encounter voltage instability, instantaneous fluctuations, voltage regulator is to solve such problems. Many people are concerned about the price of regulators when purchasing regulators. However, there are many brands of regulators on the market, and the quality of regulators is also uneven, so the price is also very different.

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