GRANSO:Your Professional RMU Grounding Switch Manufacturer!
Since its founding in 2010, Granso's first factory has grown into one of China's largest metal component manufacturers. Granso specializes in producing components for switchgear ranging from 7.2kV to 40.5kV, such as interlocks, circuit breakers, load switches, earthing switches, vacuum circuit breakers, and insulation. Through partnerships with renowned brands such as CHNT, DELIXI, and HUAWEI, Granso's annual output value has reached US$60 million.
-
![Earth Breaker Switch]()
Earth Breaker SwitchThe F unit earth breaker switch of the gas- insulated switchgear is a load switch fuse combination module, which is equivalent to the outgoing line of the ring main unit.view more
Why Choose Us
Our Factory
Owning three factories with 23000+ square meters together, Granso now has over 200+ staff, 25+ technicians. The self-production rate of parts in our company is as high as over 90%.
Quality Control
We rigorously control every process, ensuring our products comply with relevant standards such as GB7251.1, GBT/23359, and JB/T9661.
One-Stop Service
In the pre-sales stage, our team of experts will recommend the most suitable products according to the needs of customers and provide detailed technical consultation.
During the sales period, we ensure timely delivery and provide installation guidance.
For after-sales, we provide long-term technical support, warranty services and spare parts to help customers maximize the use of products and get reliable maintenance during use.
Product Parameters
Advantages of RMU Grounding Switch
Enhanced Safety and Protection
Personnel Safety:
The grounding switch provides a clearly visible and reliable connection to ground, safeguarding personnel from electrical shock or dangerous re-energization of lines during maintenance or repair activities.
Equipment Protection:
By providing a controlled path for fault currents to ground, the switch helps protect sensitive equipment from damage caused by overvoltages, transients, and fault conditions.
Fault Isolation:
The grounding switch contributes to the RMU's ability to isolate faulty sections of the power network, allowing for safer and more efficient maintenance procedures.
Improved System Reliability and Operation
System Stability:
By ensuring a definite ground reference, the grounding switch helps maintain the stability of the electrical system, even during fault conditions.
Power Continuity:
The RMU's overall design, including the grounding switch, helps to reduce power outages by quickly isolating faults, ensuring a continuous and reliable supply of electricity.
Defined Disconnect Point:
It serves as a critical component for a complete and secure disconnect, allowing for complete isolation of a section of the ring main.
Applications of RMU Grounding Switch
Power Distribution for Cities And Towns:
RMUs are perfect for cities or commercial zones, which have limited space. They provide a stable power supply in residential complexes, shopping malls, and office buildings. In addition, they help protect these structures from voltage fluctuations and power failures.
Industrial Buildings:
Manufacturing plants and factories have capital-intensive heavy machinery that requires power to be delivered continuously. Switching RMUs helps avoid outages while controlling loads, providing an efficient solution to steel plants, chemical industries, and automotive manufacturing.
Projects on Renewable Energy Sources:
Solar and wind farms incorporate the use of RMUs to manage the inflow of power and hinder the disruption of energy flow. Their ability to fault towards the unit ensures smooth operation with solar fields and wind power stations.
Underground and Compact Substations:
Maintenance-free sealing RMU technology makes it practical for use in underground power networks including metro stations, tunnels and transport hubs.
Healthcare and Data Centers:
Healthcare facilities, like hospitals, and IT infrastructure, like data centers, rely on power continuously being available. RMUs minimize system downtime via automatic fault detection and switching, meaning critical medical devices and IT systems can be kept safe.
Steps for installing an RMU Grounding Switch
Inspect parts. Ensure all components for the grounding switch, such as the operating mechanism, switch, and associated hardware, are correct and undamaged.
Clean surfaces. Before assembly, clean all bushings and contact holes thoroughly.
Prepare grounding wire. If installing a new unit or external ground, strip the insulation from the end of the grounding wire and use a crimping tool to attach a grounding lug. Verify the lug is securely attached.
Mount the switch. Install the internal grounding switch mechanism into its designated position within the RMU. The precise location will depend on the RMU's internal design, which may place the switch on the load side of the circuit breaker.
Assemble internal components. Attach the grounding switch's moving contact knife to the mechanism. This is part of the sealed switch room in gas-insulated RMUs.
Connect to busbars. Ensure the internal contacts are properly aligned with the busbars. In some modular RMU designs, busbar sections may need to be connected with specific bolts.
Locate grounding point. Identify the RMU's chassis grounding pad, marked with the international earth ground symbol.
Attach grounding wire. Secure the pre-assembled grounding lug to the chassis grounding pad using M4 screws or other specified hardware. Tighten the screws to the manufacturer's specified torque.
Connect to facility ground. Connect the other end of the grounding wire to a reliable earth ground point. This is a critical step for ensuring an effective ground for the switch.
Manual operation. Before closing the cabinet, use the operating handle to manually engage and disengage the grounding switch.
Indicator check. Verify that the position indicators for the grounding switch change correctly, and that you can visually confirm the switch position through any provided observation windows.
Safety interlock check. Confirm that the safety interlocks are functioning. For example, check that the ground switch cannot be closed if the main load break switch is also closed.
Secure the unit. Close and secure the RMU's cable access door and any other access panels.
Final tests. After installation is complete, conduct detailed commissioning and testing, including contact resistance, to ensure all functions operate correctly.
Commissioning. Once all tests are passed and the RMU is ready, you can proceed with the commissioning process to return the unit to service.
Packing and Shipping
|
Packing |
Carton/ Wooden Case / Pallet |
|
Shipping |
Express, Air Freight, Sea Freight, LCL/FCL |
FAQ
We're professional rmu grounding switch manufacturers and suppliers in China, specialized in providing high quality custom service. We warmly welcome you to buy rmu grounding switch at competitive price from our factory.
Earth Breaker Switch, earthing switch, rmu grounding switch
