Gas insulated ring main unit

Product overview

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HCM-12 SF6 fully insulated RMU each unit has its own function.When the system requires more than 6 units, two (or more)gas tanks shall be connected in the form of extended bus. Each SF6 insulated gas box can be arbitrarily expanded on the left and right sides and arranged according to different design schemes to achieve different configuration requirements. The gas box is made of stainless steel plate, with standard laser cutting and automatic manipulator welding technology. The protection grade of the SF6 tank reaches IP67. The box is filled with SF6 gas, and through synchronous vacuum pumping and helium leak detection, the tightness of the gas box is ensured. The high-voltage components adopt composite design, the disconnector and sealing switch are combined into a three position switch,and the load break switch,earthing switch,  fuse insulating cylinder and vacuum interrupter are all in the gas tank.The explosion-proof channel at the bottom of the gas tank is equipped with an explosion-proof diaphragm.When the switch is abnormal and the air pressure in the gas tank exceeds a certain value,the pressure  can be relieved from the lower explosion-proof channel to prevent the damage of high pressure gas to people, cables and other switchgear in the substation effectively.

It has the features as follows

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1. Fully insulated,fully enclosed and compact,which are suitable for any outdoor environment.

2. Modular,multi-functional combination,high reliability and compact structure reduce the floor area of subsation room.

3. Safe and reliable,long life,maintenance free.

4. Flexible expansion to meet the requirements of end users or network nodes.

5. Meet the needs of various distribution switching stations,prefabricated power substation and cable branch boxes.

Technical parameter