11KV Medium Voltage VCB Breaker with Isolation Mechanism

The important function of the medium-voltage switchgear in modern power distribution systems is protection, control, and isolation of electrical circuits. People are paying more and more attention to environmental protection now, so "environmentally friendly switchgear" adapts clean insulating mediums like clean air, vacuum, or fluoronitrile-based gas mixtures instead of traditional SF₆ as insulating medium. The 11KV Medium Voltage VCB Breaker With Isolation Mechanism is a key component of this enviromentally switchgear.

What is the purpose of this product?

It is the panel core component which is responsible for executing the essential commands to open (trip) and close the circuit breaker and disconnector contacts.The precision, speed, and dependability of this mechanism directly impact the safety of the electrical network and the continuity of power supply. As evidenced by industry surveys, the operating mechanism is the most critical subsystem, with a majority of circuit breaker faults and failures traced back to it, making its design and condition paramount.

Key Specifications

Model and meaning

What is the purpose of the operating mechanism?

The operating mechanism is a critical integrated component of medium-voltage switchgear. It stores and releases mechanical energy to rapidly move the main current-carrying contacts between OPEN and CLOSED positions. Acting as an intermediary, it converts a low-energy control signal (manual push-button or electrical relay) into the high-force action needed to operate the contacts reliably, ensuring safe circuit interruption and connection.

Key Components

1.Energy Storage Medium

Spring-operated (most common):

Used in KDSVM-12 series, especially in environmentally friendly switchgear

Motor compresses the closing spring, which closes contacts and charges the opening (trip) spring

Advantages: high reliability, simple design, maintenance-friendly

Pneumatic: Uses compressed air

Hydraulic: Uses pressurized oil or gas

Magnetic: Uses solenoid or electromagnet

2.Actuating Circuit

Components that trigger energy release, including:

Closing/tripping coils (electromagnets)

Latches

Manual buttons

3.Interlocking Systems

Safety features to prevent incorrect or unsafe operations

Example: prevent closing on a fault or closing a disconnector under load

The described RHSVM3-12 mechanism is a classic example of a modern, high-reliability spring-operated mechanism. It features a motor for automatic spring charging, separate springs for closing and opening actions (with a clever over-center linkage design for closing), and integrated electrical coils for remote operation, achieving a mechanical life exceeding 10, 000 operations.

Cotenele ensures that 11KV Medium Voltage VCB Breaker With Isolation Mechanism is factory-tested and optionally verified by third parties, guaranteeing reliability in demanding environments.

Appearance and Dimension

Application Scope

Operating mechanisms are the main components for a wide array of electrical switching and protection equipment such as medium voltage ring main units and panels. Their primary application includes below:

Medium-Voltage Circuit Breakers: This is their key electrical equipment, mainly in the 12kV to 40.5kV range common in power distribution system.They are essential in air-insulated (AIS), gas-insulated (GIS), and the latest environmentally friendly gas-insulated switchgear for primary circuit protection against overloads and short-circuits.

Disconnecting switches and grounding switches: Operating mechanisms such as the RHSVM3-12 can be used in conjunction with disconnecting mechanisms. They provide the drive for slow, careful operation of disconnecting and grounding switches.

Primary Applications Include:

♦Electrical Substations: Both primary distribution and secondary transformer stations.

♦Industrial Power Systems: For protecting manufacturing plants, data centers, and large commercial facilities.

♦Renewable Energy Plants: In wind and solar farm substations for connection and protection.

♦Infrastructure: For rail traction power supplies, airport power networks, and hospital critical power systems.

The 11KV Medium Voltage VCB Breaker With Isolation Mechanism is used for environmentally friendly switchgear, this mechanism independent from external hydraulic or pneumatic systems, can keep robusty and reliebility across temperature ranges.The mechanism complies with standards GB1984 and IEC 62271-100, This can ensure safe and reliable operation in power distribution system.

Operation Manual For Operating Mechanism

1.Energy Storage:

After the mechanism is installed and secured, attach the dedicated handle to the operating shaft located at the lower right.Turn it clockwise until you hear a solid click—this means the spring is fully charged and the indicator has engaged the limit switch. For motor operation, just apply power. The unit will automatically charge the spring and then cut off, holding the energy ready for a closing command. (Make sure your control wiring is correct for this mode).

2.Closing the Circuit Breaker:

For a manual close, just hit the green button. This releases the stored energy to snap the main contacts closed. If you're using the electrical control, energize the closing coil instead. Its quick action releases the spring to do the job, and charges the opening spring right away. (A built-in interlock will block another close operation, even if the spring gets recharged afterward).

3.Opening the Circuit Breaker:

For a manual open, press the red button. It releases the opening spring to separate the main contacts. To open it electrically, power the opening coil. Its quick action releases the spring, opening the circuit breaker.

Detailed PDF manuals available for download.

Factory tested, our 11KV Medium Voltage VCB Breaker with Isolation Mechanism is suitable for power, industrial, and renewable energy system projects worldwide.

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