The ring network cabinet is a group of transmission and distribution electrical equipment (high voltage switch cabinets) installed in a metal or non-metal insulated cabinet or assembled into a compartmental ring network power supply device. Its core part adopts load switch and fuse, which has the advantages of small size, low price, and improved power supply parameters and performance. It is widely used in high-rise buildings, large public buildings, factory distribution stations and load center box-type substations.

The ring network cabinet of the ring network cabinet manufacturer refers to the ring power distribution network, that is, the power trunk line forms a closed loop, the power supply is supplied to the ring trunk line, and the power is distributed all the way from the trunk line through the high-voltage switch. The advantage of this is that each distribution branch can obtain power from its left and right main lines. When the left trunk fails, it will continue to get power from the right trunk, and when the right trunk fails, it will continue to get power from the left trunk.

The so-called "ring network cabinet" by ring network cabinet manufacturers means that each distribution branch is equipped with a switch cabinet, and the busbar of the switch cabinet is also a part of the ring network trunk. In fact, if you take out a ring network cabinet from a ring network cabinet manufacturer alone, you will not see the meaning of "ring network".

The rated current of the ring network cabinets of these ring network cabinet manufacturers is not large, so the ring network cabinet high voltage switches of ring network cabinet manufacturers generally do not use circuit breakers with complex structures, but use simple structure high voltage fuse high voltage load switches. In other words, the high-voltage switch in the ring main unit is a load switch. The ring main unit adopts the load switch to operate the normal current, and uses the fuse to cut off the short-circuit current. The combination of the two replaces the circuit breaker, of course, this can only be limited to a certain capacity.

This switchgear can also be used in the power distribution system of non-ring network structure. Therefore, with the wide application of this switchgear, the "ring network cabinet" has jumped out of the scope of ring network power distribution, generally referring to load switches. Switched high voltage switch cabinet

The ring network cabinets of ring network cabinet manufacturers have been widely used in a short time, which is mainly due to the newly developed buildings of industrial enterprises and institutions. From the perspective of power supply and distribution, small capacity is the mainstay, distribution transformers generally do not exceed 1250kva, power supply is stable for a long time, and high-voltage switches do not frequently operate. For such users, the performance of the ring network host is not ideal, but it is already competent enough. With the large-scale construction of cities, a large number of large-scale high-rise buildings have been erected, and the substations are often located downstairs. According to fire protection requirements, substation and distribution equipment must be "oil-free". According to the reasonable utilization of the building area, the power distribution equipment should be "miniaturized". In other words, ring network cabinets or vacuum circuit breakers, dry-type transformers and dry-type transformers of ring network cabinet manufacturers have entered many buildings. The switch has higher performance and smaller size. The new load switch came into being, which promoted the technological progress of the ring main unit. The current ring main unit not only has excellent performance, but also has been serialized, which has expanded the application range of the ring main unit.