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Focus on 10kV distribution ring network cabinet
Release time:
2019-08-14
Ring network cabinet is a group of high-voltage switchgear installed in steel plate metal cabinets or electrical equipment made of assembled spaced ring network power supply units. Improve power supply parameters and performance as well as power supply security and other advantages.
In fact, if the cabinet types are classified according to switchgear, there are load switch cabinets, circuit breaker cabinets, GIS, etc., but there is no ring network cabinet. Ring network cabinet is a conventional name. It originally refers to the load switch cabinet used for ring network power supply. Now it is often used as a synonym for load switch cabinet, regardless of whether it is used for ring network power supply, such as some lines. It is necessary to close the loop (commonly known as hand in hand), or it is possible to perform load cutover (switch the load on one line to another line). The power distribution cabinet that realizes these functions is called the ring network cabinet. Therefore, the ring network cabinet is a switchgear that can realize the power supply of the ring network. It is often used in the ring network power supply system.
The load switch cabinet can be used for ring network power supply, medium voltage demarcation room dispatch, and medium voltage terminal substation power supply. The power supply departments in different regions have different specifications for the transformers that are allowed to use load switches and fuse protection. The transformer capacity is required to be no more than 1000KVA, and it may be 1600KVA in Shenzhen. The load switch cabinet is simple in structure, low in cost and small in size. Most of them can be installed against the wall. Generally, they are only protected by fuses without relay protection. The current carrying capacity of the main busbar of the load switch cabinet is generally less than or equal to 630A, the rated breaking current of the load switch is generally less than or equal to 630A (a few reach 1700A), and the rated current (fuse) of the transformer cabinet (outlet cabinet) is generally no more than 125A. The transfer of high-grade load switches The current can reach 2800A. Partial load switchgear can be installed with special vacuum circuit breaker, SF6 circuit breaker or arc extinguishing methods such as compressed air, and the short-circuit breaking capacity is close to or reaches the level of the switchgear.
The ring main unit is used to divide and close the load current, break the short-circuit current and the no-load current of the transformer, and the charging current of the overhead line and cable line at a certain distance. It plays the role of control and protection.
In fact, if the cabinet types are classified according to switchgear, there are load switch cabinets, circuit breaker cabinets, GIS, etc., but there is no ring network cabinet. Ring network cabinet is a conventional name. It originally refers to the load switch cabinet used for ring network power supply. Now it is often used as a synonym for load switch cabinet, regardless of whether it is used for ring network power supply, such as some lines. It is necessary to close the loop (commonly known as hand in hand), or it is possible to perform load cutover (switch the load on one line to another line). The power distribution cabinet that realizes these functions is called the ring network cabinet. Therefore, the ring network cabinet is a switchgear that can realize the power supply of the ring network. It is often used in the ring network power supply system.
The load switch cabinet can be used for ring network power supply, medium voltage demarcation room dispatch, and medium voltage terminal substation power supply. The power supply departments in different regions have different specifications for the transformers that are allowed to use load switches and fuse protection. The transformer capacity is required to be no more than 1000KVA, and it may be 1600KVA in Shenzhen. The load switch cabinet is simple in structure, low in cost and small in size. Most of them can be installed against the wall. Generally, they are only protected by fuses without relay protection. The current carrying capacity of the main busbar of the load switch cabinet is generally less than or equal to 630A, the rated breaking current of the load switch is generally less than or equal to 630A (a few reach 1700A), and the rated current (fuse) of the transformer cabinet (outlet cabinet) is generally no more than 125A. The transfer of high-grade load switches The current can reach 2800A. Partial load switchgear can be installed with special vacuum circuit breaker, SF6 circuit breaker or arc extinguishing methods such as compressed air, and the short-circuit breaking capacity is close to or reaches the level of the switchgear.
The ring main unit is used to divide and close the load current, break the short-circuit current and the no-load current of the transformer, and the charging current of the overhead line and cable line at a certain distance. It plays the role of control and protection.
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JIANGXI KERUI ELECTRIC CO., LTD.
Add：No. 439, No.1 Road, Area A, Xiaolan Economic and Technological Development
Fax：0791-8575 1610