Ring network cabinets are widely used

The so-called "ring network cabinet" means that each distribution branch is provided with a switch cabinet (outlet switch cabinet), and the bus bar of this switch cabinet is also part of the ring trunk. That is to say, the ring trunk is composed of the busbars of each outlet cabinet connected together. Each outlet cabinet is called a "ring cabinet". In fact, taking out a ring network cabinet alone can't see the meaning of "ring network".

The rated current of these ring network cabinets is not large, so the high voltage switch of the ring network cabinet generally does not use a circuit breaker with a complicated structure but a simple structure of a high voltage load switch with a high voltage fuse. In other words, the high-voltage switch in the ring network cabinet is generally a load switch. The ring network cabinet uses the load switch to operate the normal current, and uses the fuse to cut off the short circuit current, the two combined to replace the circuit breaker. Of course, this can only be limited to a certain capacity. This kind of switchgear can also be used in a non-ring network structure distribution system, so with the widespread use of this kind of switchgear, "ring network cabinet" jumped out of the scope of ring network power distribution and refers to the load switch High-voltage switchgear is the main switch.