Spd Backup Protector Needs To Be Equipped With An Arc Extinguishing Chamber-a Must-read When Selecting
The surge protection device contains two basic branches, one for conducting lightning current and the other for blocking short-circuit current to prevent the surge protector from catching fire and burning. The function of the surge protective device is to allow lightning current to pass through and stop the short-circuit current without damaging the surge protector at the rear end. Therefore, it needs to withstand the impact of large current. There are different opinions in the industry about whether the surge backup protector needs an arc extinguishing chamber. Some backup protector manufacturers will selectively use arc extinguishing chambers, and not every brand of SSD has an arc extinguishing chamber. Regarding this point, the editor will talk about his own views today.
The small circuit breakers we often see must have an arc extinguishing chamber inside. What is the role of the arc extinguishing chamber designed inside the SPD backup protector? The following editor will introduce to you the importance of the arc extinguishing chamber in the backup protector.
Let's first look at the working process of the backup protector. When the SPD surge backup protector is disconnected due to a short circuit, the moving and static contacts of the backup protector will generate an arc. The essence of the arc is a free gas, which can drive the surrounding gas to flow and is accompanied by high temperature. The high temperature generated by the arc will cause the metal materials of the moving and static contacts to melt. The hot melted metal particles will continue to splash under the action of the arc, causing damage to the internal components of the SPD backup protector. If not handled, there will even be a risk of explosion. In order to prevent accidents, we need to set up an arc extinguishing chamber on the backup protector.
When the SPD backup protector is performing short-circuit protection, it can effectively absorb the melted metal particles, so that the metal particles are not affected by the arc and splash everywhere. The arc extinguishing chamber plays the role of arc isolation, arc division, arc extinguishing, and arc absorption, thereby greatly improving the safety of the SCB and reducing the risk of explosion and fire.
