Voltage Stabilizer vs. UPS Power Supply

Do voltage stabilizers work the same as UPS power supplies? With more and more electrical equipment on the market, voltage stabilizers and UPS (uninterruptible power supplies) are widely used. Many users think that the voltage stabilizer is a UPS or that the two can replace each other. But there is a difference between a voltage stabilizer and a UPS power supply.

UPS power supply

UPS (uninterruptible power supplies), from the name, it can be seen that it is actually a reserve power supply. After a power failure, the energy stored in the battery is inverted and then output AC current to power the equipment, and usually, the time interval for switching from the host to the backup power supply does not exceed 10 milliseconds, so power outages will hardly have any effect on powered equipment.

UPS power supply is divided into online UPS power supply and backup UPS power supply. Generally, computers for home are equipped with a backup UPS power supply. The backup type has a voltage regulator part, which uses a relay shift to stabilize the voltage. The voltage stabilization of backup UPS has a poor effect and it cannot be regarded as a voltage stabilizer.

Online UPS power supply: When the online UPS power supply is working, it first converts the city power into DC power to charge the UPS battery, and at the same time, the inverter inverts the DC power into AC power to supply power for the load. Because the mains have gone through the conversion process of AC to DC and then to AC, the original interference and pulse voltage components in the mains have been filtered very cleanly. Therefore, the voltage from the inversion of the online UPS power supply is stable. The high-frequency UPS with small size, lightweight, and high-efficiency advantages. And the disadvantage is that it has poor resistance to overload and shock.

Voltage Stabilizer vs. UPS Power Supply
Voltage Stabilizer vs. UPS Power Supply

Voltage Stabilizer

A voltage stabilizer is designed for grid voltage instability, mainly for the protection of back-end equipment. It is composed of a voltage regulation circuit, a control circuit, and a servo motor. When the input voltage or load changes, the control circuit performs sampling, comparison, and amplification, and then drives the servo motor to rotate so that the position of the carbon brush of the voltage regulator changes. By automatically adjusting the coil turns ratio, the output voltage is kept stable.

The Function of the Voltage Stabilizer

  1. It can stabilize the voltage of low voltage 125V-165V or high voltage 250V-270V between 200-230V so that household appliances can work normally.
  2. When the input voltage is higher than 255-275V or lower than 125-160V, the power supply can be automatically cut off.
  3. When the power is suddenly turned on after the power failure, the output power supply can be started after a delay of 5-8 minutes to avoid damage to the electrical appliance due to excessive voltage. When purchasing a voltage stabilizer product for your home, you must pay attention to whether the above three basic functions are complete or not.

The regulated power supply is mainly used to stabilize the voltage, provide a stable electrical environment for electrical equipment, and avoid voltage fluctuations or interference from electrical equipment. The function of the voltage stabilizer is completely different from that of the UPS power supply, and the UPS power supply also comes with an energy storage battery, so the UPS has a higher price.

Of course, it is reasonable for many people to mix voltage stabilizers with a UPS power supply. Because some better-quality backup UPS power supplies do come with a voltage stabilization function, which is a type of electronic switching voltage stabilizer, which can be used as a voltage stabilizer. However, the effect and the accuracy of voltage regulation about that UPS are not as ideal as those of special voltage stabilizers.

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