In short, the arc protection system can protect the operator from injury and reduce the degree of property loss when arc fault occurs in the switch cabinet.

When the arc appears, the arc bursts at the speed of 300m / s, destroying any material on the way. In the main system, without power failure, arc will always exist. In order to minimize the harm of arc, we need a safe, rapid and effective arc protection device.

There are many real events of arc light caused by various faults. For example, when a substation in Tianjin is switched on for power transmission, arc light fault occurs in the switch cabinet, which causes the explosion of arrester, the fire in the distribution room, and the burning of 8 switch cabinets. We don't want to see such a heavy price.

The occurrence of arc light is caused by many aspects, and the consequences are also very serious. These tragic cases tell us to install arc light protection device. The criterion of arc light protection action is the two conditions of fault occurrence: arc light and over-current component. According to these two working principles, the arc protection system can realize different functions and protect different devices.

There are only two differences between installing arc protection and not installing it in substation. The first difference is that when the substation fails, the arc protection is installed as bus protection, so the fault can be removed in a short time, and the fault point can be determined quickly through the arc sensor, the faulty cable can be found, and the power supply can be restored in a short time after repair.

Difference 2: if arc protection is not used as bus protection, the arc light is only generated in a few milliseconds, and a major accident may have occurred before a few milliseconds can react, which may cause major damage to the circuit breaker or the burning of all the buses in the bus room, leading to a long-time power failure, and the economic loss is immeasurable.

The advantages and disadvantages of installing arc protection are clearly analyzed. The prices of arc protection in the market are uneven. You can't just choose cheap without paying attention to quality. When you buy it, you also need to compare three manufacturers. You should consider the strength, technology, quality and price of arc protection manufacturers.