Primary distribution network from a distribution substation lead to the distribution network between the inlet

Primary distribution network from the distribution power transformers to the distribution of the lead (or power distribution substation) network between the entrance. In China, also known as high voltage distribution networks. air circuit breaker 6 to 10 kV. More use of 10-volt dry urban distribution, density increases as the load, distribution capacity growth, distribution voltage rising trend. Such as Japan as Pat gradually using a 20 kV distribution voltage. Parts of China also tried 20 kV distribution program. Drawn from the distribution substation distribution lines once part of the trunk is called Link. Part of the trunk is called the separation of the branch. Branch line connected with distribution transformers.