Solid insulated ring cabinet RMU 12kv

HSI-12 solid insulated switchgear is a new generation of ring network equipment launched according to the new product and new technology planning of the State grid, which is mainly used to replace the traditional SF6 gas insulated switchgear and reduce greenhouse gas emissions. It is a new generation of environmentally friendly switchgear. Its unique patented design makes it meet the installation requirements of replacing SF6 gas insulated switchgear in terms of dimensions, and its electrical performance is stable and reliable. The inside of the switch is isolated from the outside atmosphere to effectively prevent equipment failure caused by condensation.

General:

Under the necessary conditions, the inside of the switch can be filled with N2 or other environmentally friendly gases to further improve the electrical insulation performance, better meet the requirements of high altitude and other areas, and can also be widely used in all kinds of opening and closing stations and cable branch boxes.

Service Environment

The ambient air temperature shall not exceed 40℃, and the average value measured within 24 hours shall not exceed 35℃, and the minimum shall not be lower than -15℃;
The altitude does not exceed 3000m;
Relative humidity: the daily average does not exceed 95%, the monthly average does not exceed 90%.
Water vapor pressure: daily average does not exceed 2.2kPa, monthly average does not exceed 1.8kPa.
The surrounding air is not significantly contaminated by dust, smoke, corrosive and/or flammable gases, vapors or salt spray.
When the switch cabinet is installed at an altitude higher than 3000m, the customer should negotiate with the manufacturer about the factory conditions (elevation correction factor confirmation) and ask for the relevant factory inspection report.
When the maximum ambient temperature exceeds 40 ° C, the rated current carrying capacity of the switch cabinet must be reconfirmed by the manufacturer when ordering.

Key Feature

Combined with the three-station lower isolation switch, the isolation fracture is provided with a ground zone
Isolation contact and other heating parts can be directly observed to ensure safety
The arc extinguishing chamber is firmly sealed in the insulation body, and the isolation switch is sealed in the insulation chamber

Technical Data

Name		Unit	Data
Rated voltage		kV	12
power frequency withstand voltage(phase to phase、to earth)		kV	42
power frequency withstand voltage（open contact）		kV	48
lightning impulse withstand voltage(phase to phase、to earth)		kV	75
lightning impulse withstand voltage（open contact）		kV	85
Rated frequency		Hz	50
Rated current of main bus		A	630
Rated current of branch loop	Circuit breaker, load switch	A	630
	Load switch + fuse combination appliance		125
Rated short-time withstand current (including load switch)		kA	25、31.5
Rated peak withstand current (including load switch)		kA	63、80
Rated short circuit duration		s	4
Protection class (Enclosure/compartment)			IP40/IP20
Operational continuity classification			LSC2B-PM
IAC class (including circuit breaker room, cable room, bus room)			BFLR，25kA，0.5s
Static load		kg	300~500
Live load		kg	800~1000
Overall dimensions of switchgear (W×H×D)		mm	400x1750x800