8 Reasons to Use UPS and EPS Power Supplies

During the operation of the data center computer room, host shutdown faults are often closely related to the power system. In order to ensure the safety, reliability, and stability of the power supply system, it is necessary to carefully plan and design the power supply and distribution system in accordance with current regulations.

We all know that urban electricity drives most of our electricity load, meeting our daily work, life, and study needs. But in factories, computer rooms (weak current rooms and strong motor rooms), distribution cabinets, and even in some homes, EPS and UPS power supplies are used. Many people know that continuous electricity is very good, but why are EPS and UPS power supplies so popular?

Is the electricity supply really continuous and constant? Why use UPS power supply?

1. There is a surge in the circuit: it refers to the effective value of the output voltage being 110% higher than the rated value and lasting for one or several cycles. Electric surges are mainly caused by the sudden unloading of large electrical equipment connected to the power grid during shutdown, resulting in high voltage.

2. High voltage sharp pulse: refers to a voltage with a peak value of 6000V and a duration ranging from one thousandth of a second to one half of a cycle (10ms). This is mainly caused by lightning strikes, arc discharges, static discharges, or switching operations of large electrical equipment.

3. Transient overvoltage: refers to a pulse voltage with a peak voltage of up to 20000V but a duration between millionths of a second and tens of thousands of seconds. The main reason and possible damage are similar to high-voltage sharp pulses, but there may be differences in the solutions.

4. Voltage dip: Refers to a low voltage state where the effective value of the mains voltage is between 80% and 85% of the rated value, and it lasts for one to several cycles. Starting up large equipment, starting large motors, or connecting large power transformers can all cause this problem.

5. Wire noise refers to radio frequency interference (RFI), electromagnetic interference (EFI), and various other high-frequency interferences. The operation of motors, the action of relays, the operation of motor controllers, broadcast emissions, microwave radiation, and electrical storms can all cause line noise interference.

6. Frequency offset: refers to a change in the mains frequency exceeding 3Hz. This is mainly caused by the unstable operation of the emergency generator or the power supply with unstable frequency.

7. Continuous low voltage (brownout) refers to the effective value of the mains voltage being lower than the rated value and lasting for a long time. The causes include: startup and application of large equipment, switching of main power lines, startup of large motors, and line overload.

8. Mains interruption: refers to a situation where mains power is interrupted and lasts for at least two cycles to several hours. The reasons for its occurrence include: circuit breaker tripping on the line, interruption of mains power supply, and power grid failure.