Application of ring main unit

The widespread use of ring main units is mainly due to the newly-developed buildings of industrial enterprises and institutions. From the perspective of power supply and distribution, most of the small and medium-sized power distribution transformers generally do not exceed 1250KVA. Long-term stable power supply, high-voltage switch infrequent operation. For this type of user, the performance of the ring main unit is not perfect, but it is sufficient. With large-scale urban construction, a large number of large-scale high-rise buildings have been erected, and the substations are often located downstairs. According to the fire protection requirements, the substation and distribution equipment must be "oil-free" and be used reasonably according to the construction area. , The transformer and distribution equipment should be "miniaturized", so ring network cabinets or vacuum circuit breakers, dry-type transformers, and dry-type transformers have entered each building. The ring network cabinet has simple structure, reliable and safe operation, small maintenance, and low operating cost. Compared with switch cabinets equipped with circuit breakers, it has outstanding advantages. The ring main unit requires the load switch to have higher performance and smaller size. A new type of load switch came into being, which in turn led to the technological progress of the ring main unit. Today's ring main unit is not only excellent in performance but also serialized , This has expanded the scope of use of the ring network cabinet.