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    Uninterruptible Power Supply 

    UPS (uninterruptible power supply) is an abbreviation for Uninterruptible Power Supply. If translated directly, it means It's a continuous power supply. Or it can be said that UPS is a type of electrical equipment that can supply electrical energy to electrical equipment. or computer continuously Even when there is a power outage or electrical problem. It can receive electrical energy in all conditions. and then output electrical energy as normal The main components of a UPS are as follows:

    • Backup power source - batteries to reserve electrical power for use in the event of a power outage. Or a momentary power outage, the UPS will be able to supply backup power to connected electrical equipment for a short period of time.
    • An AC to DC electrical converter (Rectifier) ​​or battery charger (Charger) converts the AC electrical current received from the power supply system. It is DC current and is charged in the battery.
    • The DC to AC electrical converter (Inverter) converts the DC electrical current received from the battery. It is AC current for use with electrical equipment or computers.


    • To supply backup power to electrical and electronic equipment. When there is a power outage or power outage To allow time for saving data and not damage the hard disk.
    • To adjust the voltage to a level that does not harm electrical equipment and electronic devices. When electrical problems occur, such as power outages, power outages, power surges, and overloads, etc.
    • To prevent electrical interference that can damage data and electrical equipment.
    • To help extend the life of electrical equipment, IT equipment, and electronic equipment.
    • Allows you to save data (Save) of open data files.
    • Does not cause errors in data and program operation.
    • You can shut down the computer system according to the steps.

    Stabilizer or Automatic Voltage Regulator (AVR) is a voltage stabilizer To be stable and smooth to prevent electrical problems. Undervoltage - overvoltage for the stabilizer (Stabilizer) is a device to prevent undervoltage - overvoltage. and adjust the voltage and current to suit Helps distribute electricity smoothly. Peripheral devices can therefore work at full efficiency. And most importantly, when the current is consistent It will help the device work more efficiently. It also reduces the rate of damage caused by electrical problems as well as helping to prolong the life of the tools. Ideal for devices that need to work all the time. such as server Telephone booth medical equipment Scientific instruments, industrial machinery or use with other types of equipment You can get many more as needed.

    Selecting the size of the automatic voltage regulator

    1. Make a list of electrical equipment that will be connected to the voltage regulator.
    2. Each type of electrical equipment has a nameplate indicating the required voltage (V) and current (A), or some devices display watts (W), usually on the back. machine
    3. Include the wattage (W) of all electrical equipment that will be connected to the voltage regulator.
    4. Choose a voltage regulator with a wattage higher than the total wattage of all electrical equipment.
      • Voltage regulator size 3KVA 2400w
      • Voltage regulator size 5KVA    4000w
      • Voltage regulator size 8KVA    6400w
      • Voltage regulator size 10KVA  8000w
      • Voltage regulator size 20KVA  16000w
      • Voltage regulator size 30KVA 24000w


    Want to calculate the size of a voltage regulator that can be used with a 9000btu air conditioner, a 60W fan, a 1240W rice cooker, and 10 28W light bulbs.

          Air conditioner (9000x0.263) = 2,367w
          Fan (60)x30% = 78W
          Rice cooker =1240w
          Light bulb 28x10 = 280w
          Total W = 2367+78+1240+280 = 3965w 
    Therefore, the size of the voltage regulator that can be safely used with such electrical equipment is 4000W and above or an 8Kva  6400W voltage regulator.

    Voltage drop is Usually the term "voltage drop" is applied to voltage. Or what we understand by the word "220 volt power" is actually single-phase power. The electrical authority will specify that it is 230V power. The electrical authority will accept a voltage drop from normal that is not more than 5% or 220V.

    The fire was caused by the cause

    1. There is an increase in the number of houses in the area. There is a fight over the use of electricity.
    2. Long distance from power supply
    3. Born before the fire goes out
    4. There is heavy rain.
    5. There is high energy use in the home, such as water heaters, air conditioners, or equipment that uses high-revving motors and water pumps.

    Notice that our house lost power

    • The light bulb doesn't quite turn on. or difficult to open or blinking rapidly
    • The light bulb turns on but is less bright.
    • The water pump doesn't work. Or the high-rpm motor equipment doesn't work!! and must immediately turn off or pull the plug out When you
    • encounter something like this Otherwise it will be damaged and there is a risk of fire.
    • The air conditioner doesn't work, only air comes out.

    Problem solving

    • Long-term power outage: Notify the electrical utility that takes care of your home.
    • Short-term power outages: Use an automatic current regulator or stabilizer to prevent power outages and overloads. In cases where the equipment is very important and expensive