35KV compact pre-assembled substation, commonly known as Chinese box variable, is a new type of box-type substation, the product is heavily used in wind farms and photovoltaic power farms. It is mainly composed of transformer body, high-voltage electrical part, low-voltage electrical part and box body. The transformer is a three-phase double-winding oil- immersed self-cooling non-excited voltage regulating power transformer; the high-voltage electrical part of the Chinese box variable is mainly composed of 35kV high-voltage circuit breakers, 35kV isolation switches, 35kV current transformers, 35kV voltage transformers, 35kV lightning arrester, 35kV charged display and so on; the low-voltage electrical part of the Chinese box variable is mainly composed of low-voltage frame circuit breakers, self-use power system (self-use transformer, feeder switch and so on), low-voltage electrical part of the box body and so on. The low-voltage electrical part of Chinese box variable mainly consists of low-voltage frame circuit breaker, self-use power system (self-use transformer, feeder switch, etc.), surge protector, etc.
Product design is reasonable; easy to install; simple operation, avoiding the limitations of the capacity of the American box variable, but also than the wind power (photovoltaic) European box substation has obvious cost advantages, the product is suitable for new energy generation field, the development prospect is broad. The product is suitable for new energy power field and has a broad development prospect,