What is the ring network cabinet?

Ring network cabinet is a group of high voltage switch equipment installed in steel plate metal cabinet or assembled into interval ring network power supply unit of electrical equipment, the core part of the load switch and fuse, with simple structure, small size, low price, can improve the power supply parameters and performance and power supply safety and other advantages.

In fact, if the cabinet type is classified according to switch equipment, there is load switch cabinet, circuit breaker cabinet, GIS, etc., and there is no ring network cabinet. Ring network cabinet is a common name, the original refers to the load switch cabinet used for ring network power supply, now is often regarded as the synonym of load switch cabinet, regardless of whether it is used for ring network power supply, such as some lines to close the ring operation (commonly known as hand in hand), Or it is possible to perform load cutover (switch the load from one line to another line) a distribution cabinet that performs these functions is called a ring cabinet. Therefore, ring network cabinet is a kind of switching equipment that can realize ring network power supply, often used in the ring network power supply system, so it is commonly known as ring network cabinet, also known as "outdoor box ring network cabinet", "open and close".

Load switch cabinet can be used for ring type power supply, medium voltage boundary room connection, medium voltage end substation power supply, power supply departments in various regions to allow the use of load switch and fuse protection of transformer specifications requirements are different, such as Beijing generally requires transformer capacity is not more than 1000KVA, Shenzhen area may be 1600KVA. Load switch cabinet structure is simple, low cost, small volume, most can rely on the wall installation, generally only fuse protection and no relay protection. The rated breaking current of the load switch is generally less than or equal to 630A (a few reach 1700A). The rated current (fuse) of the transformer cabinet (outlet cabinet) is generally not more than 125A. The transfer current of the high-grade load switch can reach 2800A. The partial load switchgear can be installed with special vacuum circuit breaker, SF6 circuit breaker or arc extinguishing mode such as pressurized air, and the short-circuit breaking capacity is close to or up to the level of the switchgear.

Ring grid cabinet is used to split and close load current, break short circuit current and transformer no-load current, and charge current of overhead line and cable line at a certain distance. It plays a role of control and protection, and is an important switching equipment of ring grid power supply and terminal power supply.