Ring Main Units
Ring Main Units
In an electrical power distribution system, a ring main unit (RMU) is a factory assembled, metal enclosed set of switchgear used at the load connection points of a ring-type distribution network. It includes in one unit two switches that can connect the load to either or both main conductors, and one or two circuit breaker and switch that feed a distribution transformer. The metal enclosed unit connects to the transformer either through a bus throat of standardized dimensions, or else through cables. Ring main cables enter and leave the cabinet. This type of switchgear is used for medium-voltage power distribution, from 7.2kV to about 36kV.
Dhafir Group for General Trading has been supplying RMUs in UAE since the early 1990s and thousands of units have been installed and successfully commissioned. Today, DGT is a leading supplier of RMU in Abu Dhabi. DGT has executed Long Term Price Agreement with ADDC and AADC for supplies of RMUs.
Dhafir Group for General Trading offer all types of RMUs - 11kV, 22kV and 36kV as per utility and project requirement.
Dhafir Group for General Trading has been supplying RMUs in UAE since the early 1990s and thousands of units have been installed and successfully commissioned. Today, DGT is a leading supplier of RMU in Abu Dhabi. DGT has executed Long Term Price Agreement with ADDC and AADC for supplies of RMUs.
Dhafir Group for General Trading offer all types of RMUs - 11kV, 22kV and 36kV as per utility and project requirement.
Key Technologies For Ring Main Units
- Insulating medium SF6
- Laser welding
- Gas tightness and dew-point development
- Pressure relief device / pressure coordination
- Ready-for-service indicator
- Bushings
- Operating mechanism technologies
- Principle of three-position switch
- Earthing switch barrier, fuse replacement
