The four major advantages of ring main units

1. Mechanical interlocking and electrical interlocking also have strict requirements. Therefore, the structure of the Ring Main Unit must first ensure that it is not prone to failure, that is, when the load switch is in the closed position, it is not easy to achieve closed control. Grounding switch. Similarly, when the grounding switch is in the closed position, it is also not easy to achieve the closing control of the load switch. If the front door of the Ring Main Unit is open, the load switch must not be closed again to effectively prevent misoperation.

2. High-performance parameters: The vacuum and SF6 load switches used in vacuum ring main units and Sf6 Ring Main Units are repeatable control types, and the "on-off" times of the rated active load can reach 100 times. The compressed air load switch is more than ten times that of the ordinary load switch.

The breaking ability of **. The short-time withstand current usually reaches 20kA, and the short-circuit closing current usually reaches 50kA. 3. Convenient maintenance: The Ring Main Units of high and low voltage complete sets of equipment are usually assembled in the distribution room, avoiding possible risks such as vehicle collisions, human damage, water flooding, and water leakage. Meet the requirements of ring network cable branch boxes. Indoor control maintenance can also minimize the damage caused by weather conditions to the control. The cabinet's simple and clean shell design makes the wiring method marked on the cabinet clear at a glance in the form of a simulation diagram. The grounding switch has a visible open circuit, and the load switch and disconnector have an automatic linkage function. That is, when the vacuum load switch is disconnected, the disconnector will automatically disconnect, generating a visible open circuit. When the vacuum load switch is disconnected, the disconnector will automatically close.

3. Some manufacturers' Ring Main Units are marked with operation instructions and common problems, which further reduces the operating costs. Operators may make operational mistakes; Most of the equipment is equipped with a startup display device, which can monitor the startup mode of the main control circuit. It can not only remind of the high-voltage startup status but also work in conjunction with an electromagnetic lock to forcibly lock the handle door. Improve the performance indicators for preventing misoperation; The fully transparent acrylic panel window on the front door allows you to immediately check the on and off modes of the load switch.

4. Flexible operation and convenient expansion: With the improvement of operation experience, expandable outdoor Ring Main Units are gradually replacing the previously enclosed Ring Main Units. The configuration of network cabinets has been able to flexibly meet the requirements of various scheme designs and can be combined according to the specific needs of users. The interface method of the cable tray is also quite flexible. Even if the ground is uneven, it can achieve a soft connection and is less likely to cause partial discharge. Logo Equipped with assembly automation technology interfaces, it makes full preparations for the construction of power automation technology.