GRANSO:Your Professional MV Earthing 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.
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![11kv Earth Switch]()
11kv Earth SwitchThe 11kv earth switch JN15-12/31.5 is a specific model of high-voltage grounding switch designed for indoor installation in 12kV-rated electrical systems. Its primary function is to provide a...view more -
![Earth Switch in Switchgear]()
Earth Switch in SwitchgearThe earth switch in switchgear JN22-40.5/31.5 is a specific indoor high-voltage grounding switch designed for use in 40.5kV-rated electrical systems. Its core function is to provide a reliable,...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.
Key technical specifications are embedded in its model number:
JN22:
Model designation (J = Grounding Switch, N = Indoor, 22 = Design series).
40.5:
Rated voltage of 40.5 kilovolts (kV). It's used in systems typically operating at 35kV (derated per standard practice).
31.5:
Rated short-time withstand current (short-circuit current) of 31.5 kiloamperes (kA). This defines its ability to safely carry extreme fault current for a specified duration (usually 2-4 seconds) without damage.
Advantages of MV Earthing Switch
High safety:
The earth switch can effectively connect the circuit to the ground wire. When leakage or failure occurs in the circuit, the current can be directed to the ground in time to avoid harm to personal safety.
01
Protection equipment:
The earth switch can provide protection for electrical equipment. When the voltage of the equipment is too high or overloaded, the grounding switch will automatically cut off the circuit to avoid equipment damage.
02
Reduce electrical interference:
The earth switch can effectively reduce electrical interference, such as overvoltage, electromagnetic wave interference, etc., and provide a good electrical environment.
03
Energy saving and environmental protection:
The use of earth switch can avoid current leakage and reduce the waste of electric energy, thereby achieving the purpose of energy saving and environmental protection.
04
Easy maintenance:
Earth switch usually have the characteristics of high reliability, long life, easy operation, etc., and maintenance and management are relatively simple.
05
Applications of MV Earthing Switch
Commercial Buildings:
Medium voltage earthing switch is commonly used in commercial buildings to distribute power to various floors, sections, or tenants. It provides a centralized and efficient means of controlling electrical circuits for lighting, HVAC systems, and other building services.
Industrial Facilities:
In industrial settings, medium voltage earthing switch plays a critical role in powering and protecting machinery, production lines, and other essential equipment.
Utilities and Power Plants:
Medium voltage earthing switch is extensively utilized in utility substations and power plants for the distribution and control of electrical power. It ensures the reliable operation of transformers, generators, and other power generation and distribution equipment.
Renewable Energy Installations:
With the increasing focus on renewable energy sources, medium voltage earthing switch is integral in connecting and distributing power generated by solar farms, wind turbines, and other renewable energy installations.
Transportation Infrastructure:
Medium voltage earthing switch is employed in transportation infrastructure, including railway systems and airports. It facilitates the distribution of power for signaling, lighting, and other critical systems.
Components of MV Earthing Switch
Operating Mechanism: This is the core component that actuates the earthing switch. It provides the torque required to open and close the switch, ensuring the switch can overcome resistance and operate quickly and reliably. Depending on specific needs, the operating mechanism can be simple manual operation or motorized for remote and automated control.
Insulating Base and Bracket: The insulating base and bracket are the structural framework of the earthing switch, securely securing all core components and mounting them within the switchgear. The base is typically made of insulating material to provide the necessary electrical isolation, while the bracket withstands mechanical stress and ensures stability during operation.
Main Contact Assembly: This is the primary functional component for earthing, typically consisting of a movable earthing blade and a fixed static contact. The earthing blade rotates via a main shaft, making firm contact with the static contact, forming a reliable grounding path capable of carrying short-circuit current.
Sensors and Microswitches: For precise control and interlocking, many earthing switches are equipped with sensors or microswitches. These components monitor the switch's real-time position (open or closed) and provide status signals to the control system. This effectively prevents accidental operation and is crucial for automation and safety interlocks.
Compression Spring: The compression spring acts as an energy storage device within the operating mechanism. It is compressed during operation and releases energy at critical moments, driving the earthing switch for rapid movement. This design ensures that the switch's opening and closing speeds are unaffected by the operator, thereby enhancing reliability and safety.
Insulation Cover: An optional accessory, the insulation cover effectively improves insulation levels and provides additional protection for the earthing switch. It helps isolate live components, further enhancing the overall safety protection of the switchgear system.
Packing and Shipping
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Packing |
Carton/ Wooden Case / Pallet |
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Shipping |
Express, Air Freight, Sea Freight, LCL/FCL |
FAQ
We're professional mv earthing switch manufacturers and suppliers in China, specialized in providing high quality custom service. We warmly welcome you to buy mv earthing switch at competitive price from our factory.
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