I. Application
The B-1 Transformer Protection Switch Box is suitable for power distribution networks with an AC frequency of 50Hz (Note: “50H7” in the original text is corrected to “50Hz”, a common typo for alternating current frequency) , a rated voltage of 380V, and a rated current of up to 630A. It is used as overload and short-circuit protection for the secondary side of outdoor public distribution transformers. Additionally, it can be used for infrequent breaking of circuits under normal operating conditions.