High-voltage ring main units (HV RMUs) are compact and expandable metal-enclosed switchgear that use sulfur hexafluoride (SF₆) load switches as the main switches, adopt air insulation for the entire cabinet, are suitable for distribution automation, and can also be used in pad-mounted transformers. HV RMUs feature a simple structure, flexible operation, and reliable interlocking. They can provide satisfactory technical solutions for various application scenarioses and different user requirements. The adoption of sensing technology and the latest protective relays, coupled with advanced technical performance and lightweight, flexible assembly schemes, can fully meet the ever-changing market demands.
Structural Characteristics of High-Voltage Ring Main Units:
1、The load switch adopted is an independent unit filled with sulfur hexafluoride (SF₆) gas as the insulation medium, offering long service life, high parameters, no pollution, and low maintenance requirements;
2、The cabinet shell is made of high-quality steel plates or aluminum-zinc coated steel plates according to user needs, boasting advantages such as corrosion resistance, oxidation resistance, a novel and attractive external structure;
3
、Spring energy storage operation is adopted, with three-phase automatic tripping function. The five-prevention interlock is integrated with the operating mechanism, ensuring safe and reliable linkage;
4、The switchgear can be easily configured into ring network power supply units and other wiring modes, and can be extended infinitely;
5、Equipped with SF₆ load switches, it delivers safe and reliable comprehensive performance, being oil-free, non-toxic, and free from fire and explosion hazards;
6、The cabinet has a simple structure, convenient operation, small volume, light weight, and an attractive appearance.
This article is edited and organized by DAYA Electric Group Co., Ltd. (https://www.hygraphics.com/). Please indicate the source when reprinting.