Consult an expert: what is the purpose of installing lightning arrester on 10KV?
But in the handcart cabinet, poses a problem in space inside the vehicle, if the accident or fault arrester, even PT burned together, so now most people will arrester in a separate cabinet.
The arrester is placed in the PT loop, there are several reasons, one is the traditional way of installation, two is the PT space in the cabinet is relatively large, can hold three, PT is generally long charging operation, almost no outage opportunities, lightning arrester and long charging operation, put to the class together. Four is the operating current PT and arrester are very small, can control a common isolation switch, save a disconnecting switch...
A lightning arrester, usually placed on a PT hand truck, is used to protect against external overvoltages, i.e., lightning overvoltages. In a thunderstorm, lightning line, or nearby lightning, lightning wave will be along the wire into the user distribution room, by bus, immersed in electrical equipment, transformer insulation breakdown, causing damage to the equipment, it must install arresters on the bus, in order to eliminate the threat of lightning equipment insulation voltage; overvoltage in particular, the operating overvoltage eliminated mainly by the outlet switch is connected with the overvoltage absorber "(also useful Zinc Oxide arrester instead, but the effect is not good) to complete the.
The circuit breaker generates overvoltage when it is put into inductive load (i.e. operating overvoltage). According to this principle, the no-load transformer will produce over-voltage when it is put into operation. The principle of the voltage transformer is a transformer, so it needs to install a lightning arrester. Busbar protection.
A distribution device that protects the equipment against lightning shock waves. This device is normally connected between overhead conductors and earth. The transmission equipment is connected in parallel to transmit excess voltage to the earth and release electrical energy
