What is the difference between a surge protector and a surge arrester?

The purpose of installing a surge protector is to effectively and quickly limit the transient overvoltage to the level to which the equipment can withstand (lightning strikes and operating overvoltages); products of different quality and using different technologies have different effects.

Surge into the facility will be distributed throughout the building's power distribution system. The size of the surge protector used depends on where it is installed. The surge energy appearing at the main entrance of the building is the largest. It gradually dissipates through the power distribution system. The strength of the distribution board decreases gradually through each branch. Finally, the surge current experienced by the terminal board is the smallest and is discharged in the depth of the system.

Surge protectors installed at the main entrance of a building must have a fairly large current shunt capability, while devices deep in the building can use a much smaller guard to handle residual lightning strikes and locally generated surges.

In short, the primary line of defense is: to install large SPDs at the main entrance of the building, because the greatest threat to electrical equipment is lightning strikes that couple transient surges through the AC power cord to the interior; second, the second line of defense is: The middle section of the building is protected because the more common surges are caused by elevators, photocopiers, air conditioners, welders, etc. The installation of suitable SPDs at the distribution panel can effectively suppress these surges to a safe voltage level.

It is not necessary to install many SPDs. It is necessary to look at the protection distance of the SPD. The voltage protection level of the installed SPD plus the induced voltage at both ends of the lead and whether the reflected wave effect is sufficient to protect the remote from it. Protect the equipment.

Select the voltage protection level of the small SPD allowed by the technology; use Kevin wiring to avoid the induced voltage of the leads at both ends; verify the oscillation protection distance; consider the voltage protection level among devices, if the line is not shielded, Taking into account the induced voltage of the line;

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