Mechanical Design and Electrical Experiment of Large Current Connector for Transformer Terminal and Drain Wire in Distribution Network

The terminal and the drain wire of distribution transformers are generally connected by bolts, which appears not only reliable, convenient and simple in connection and assembling, but also easy to disassemble. However, the bolt connection is prone to fail, and it is easy to loosen under force. In this paper, a bolt-free quick connection design is proposed, which introduces a large current connector plug-in structure between the voltage side terminals of the transformer and the drainage line instead of the existing bolt connection. Through the experiments performed, the performance test indicators of the large-current connector after being connected to the transformer seems to meet the requirements, and is suitable for extreme environment with humidity, dust, ultraviolet rays and other harsh, which effectively improves the flexibility and convenience of the distribution transformers operation.