11KV Ring Main Unit Vacuum Circuit Breaker Disconnector

A ring main unit is a compact electrical equipment with the features such as compact size, flexible functions, and reliable operation. An environmentally friendly switchgear is a switchgear that uses dry air or nitrogen as the insulation medium. Its main advantage is that it is free SF6 gas, which is more conducive to environmental protection. The KDV-12D/630-20-S series 11KV Ring Main Unit Vacuum Circuit Breaker Disconnector produced by Cotenele Company, which integrates isolation switches, is the core component of these two types of medium voltage switchgear.This device short-time withstand current of Vacuum circuit breaker main circuit meets 20kA (4s) and 25kA (3s), the mechanical life of the circuit breaker is 10000 times, and the mechanical life of the isolating switch is 3000 times. The short-term withstand current of the grounding switch meets 20kA (4s), and the mechanical life is 3000 times.

Model and meaning

Product Features of Vacuum Circuit Breakers

The vacuum circuit breakers are the core components of a medium-voltage RMUs and eco-friendly switchgears, they are favored in modern power distrubition grids due to excellent performance and environmental benefits:

Superior Arc Quenching: The VCB's core technology mainly based on its vacuum interrupter. When the contact surface separates, the generated arc will almost instantly extinguish during the cooling and re condensation of ionized metal particles in a vacuum environment. This process is extremely fast and efficient, resulting in minimal wear on the contact surface.

Virtually Maintenance-Free: Unlike the circuit breakers which use the oil or gas as the insulating medium, VCBs have no any arc extinguishing medium. This reduces maintenance work, labor costs, and service interruptions highly, making it a highly cost-effective.

Eco-Friendly Operation: VCBs operate without using any Sulfur hexafluoride (SF₆) as insulating medium. This is very friendly for the environment protection, aligning with global sustainability concept.

Compact and small size: The vacuum circuit breaker construction is simple and compact, smaller footprint, this make them simplifying installation in space-constrained environments like substations, industrial plants, and commercial buildings.

High Mechanical and Electrical Endurance: VCBs are exceptionally durable and can withstand frequent switching operations without degrading, ensuring long-term reliability for demanding applications.

Product Features of Switch Disconnectors

A disconnector have the features of versatility and safety, available to suit various applications:

Load-Break Capability: The isolating switch main function is safely switch load currents on and off, providing a reliable means of circuit control.

Visible Isolation: A primary function of the isolator switch is for guaranteeing safety for personnel performing maintenance through providing a visible gap in the circuit, .

Robust Short-Circuit Withstand: They have high fault-level robustnes which can withstand the thermal and mechanical stresses of high short-circuit currents for a limited time.

Dual Insulation Options:

Air-Insulated Switch Disconnectors: This option is cost-effective, This solution is suitable for applications like cable sectionalizing, transformer switching, and motor circuits. They can be integrated with fuses for enhanced transformer protection and are used in metal-enclosed switchgear and mining applications.

Gas-Insulated Switch Disconnectors: This sort of diconnector utilizs sealed-pressure SF6 or SF6-free technology, It has high performance and a long operational life, within an extremely compact footprint, suitable for installations in compact space.

What are the advantages of this combination?

The 11kV Ring Main Unit Vacuum Circuit Breaker Disconnector is a core component of ring main units or environmentally friendly switchgear, and has many advantages:

Combined Functionality and Safety

This integration creates a complete switching and protection unit. Commonly, the VCB handles all automatic fault interruptions, while the isolating switch integrated with the vacuum circuit breaker provides a visible, verifiable isolation point for safe maintenance, satisfying the strictest safety regulations.

Space and Cost Efficiency

Combinating these two core components together to form a independent component, will minimize the overall size of the switchgear. This can reduce the panel space and simplifie internal cabling and busbar connections, and will lower installation costs.

Enhanced Operational Security

The solution of combination of these two components has mechanical interlocks that prevent unsafe operations. For example, the interlock can ensure the disconnector cannot be opened when the VCB is carrying current, this will ensure the safety of both equipments and operators.

Simplified Maintenance

When both of the vacuum circuit breaker and the disconnectors are intergrated to a whole component, they are closed proximity and mechanically linked, the maintenance operation will become more straightforward. The maintenance worker can safely isolate the circuit by the disconnector, and confirm that the VCB is also open to de-energized the power system .

Improved System Longevity

The combination of the vacuum circuit breaker and Isolator switch optimizes the entire protection and switching process, reducing unnecessary operation on each individual component and contributing to the long-term reliability and durability of the RMU and the whole power distribution system .

Technical Parameters

Appearance and Dimensions

FAQ

Q1:Do You Provide The OEM/ODM Service?

A: Yes, We provide OEM/ODM service based on your requirements, we can design the engineering drawings as well, The nameplate or the trademark can fill in your company information your provide, also, you can, you can apply to be our agent of your district or country.

Q2:Do you provide samples? Is the sample free?

A:Yes, We can provide some free samples of components of the switchgears, but can not to provide the complete equipments such as RMUs or switchgears.and the shipping fee need to be borne by yourselves.

Q3:Where is your factory located?

A: Our factory is located in Wenzhou City, Zhejiang Province, China.The detail address is Building 6, No. 555 Liule Road, Liushi Town, Yueqing City, Wenzhou City, Zhejiang Province, this site is only 20KM from Wenzhou Longwan airport.If your come to Whenzhou, please tell us, we will pick you up in the Longwan airport .

Q4:Can I visit your company for inspection?

A: Of course, we warmly welcome your visit.

Q5:what is the highest rated voltage and the highest rated current for your product?

A: Our product has a maximum rated voltage of 40.5kv and a maximum rated current of 3150A.

Q6:What is an 11kV Ring Main Unit Vacuum Circuit Breaker Disconnector?

A: It is a core component of a medium-voltage ring main unit (RMU) that integrates a vacuum circuit breaker (VCB) and a disconnector. It is used in power distribution systems to achieve switch control, fault protection, and safe isolation operations, and is suitable for industrial, urban power distribution, wind power, and photovoltaic scenarios.

Quality Warranty And After-sale Service

1.We provide remote video technical guidance and free training. Free maintenance is offered within one year of product operation; paid maintenance is available after one year.

2.2. We respond quickly to customer needs, replying by phone or email within one hour.

3.We provide long-term consulting services to resolve customer technical issues at any time.

Production workshop

Products Show