Intelligent all-insulating full-closing inflatable ring main unit

Abstract

An intelligent all-insulating full-closing inflatable ring main unit mainly consists of a main loop and an intelligent control loop. A wire inlet cable head (1) is connected to a fixed contact of a grounded knife (2), a moving contact of the grounded knife (2) is connected to a fixed contact of a vacuum breaker (4), a moving contact of the vacuum breaker (4) is connected to a fixed contact of an isolating switch (5), a moving contact of the isolating switch (5) is connected to a wire inlet seat of a fuse (6), a wire-out end of the fuse (6) is connected to a wire-out cable head (7), the wire-out cable head (7) is connected to a main bus (9), and the main loop is formed. Components of the main loop are fixedly installed in an inflating box (10) which is filled with gas SF6. A voltage mutual inductor (3) is connected to the main loop in parallel, a current mutual inductor (8) is sleeved on the main bus (9), secondary lines of the voltage mutual inductor (3) and the current mutual inductor (8) are connected to a data input end of a microcomputer comprehensive protector (11) respectively, a control output end of the microcomputer comprehensive protector (11) is connected to an electric control end of the vacuum breaker (4) and the intelligent control loop is formed.

Description

1. Technical field [0001] The invention relates to a 10kV / 24kV power transmission and distribution system, a medium-voltage ring network power distribution cabinet in the field of ring network power supply, and is a new generation of intelligent fully insulated and fully enclosed inflatable ring network cabinet that can be combined with multiple units. 2. Background technology [0002] At present, most of the known medium-voltage inflatable cabinets use conventional fixed switch cabinets, which use the good insulation performance of SF6 gas and adopt modular structures, which can be spliced ​​into various main wiring schemes. There are single-box and common-box inflatable structures type ring network cabinet, but none of them have the intelligence of the control circuit and the fully insulated and fully enclosed functions of the multi-level switching elements in the main circuit. 3. Contents of the invention [0003] The purpose of the present invention is to provide an in...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the known medium-voltage inflatable cabinets use conventional fixed switch cabinets, which use the good insulation performance of SF6 gas and adopt modular structures, which can be spliced ​​into various main wiring schemes. There are single-box and common-box inflatable structures type ring network cabinet, but none of them have the intelligence of the control circuit and the fully insulated and fully enclosed functions of the multi-level switching elements in the main circuit.

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