33KV Medium Voltage Circuit Breaker Operating Mechanism

The KDCM-40.5/630-20-X 33kV Medium Voltage Circuit Breaker Operating Mechanism is a high-reliability actuator designed for 12kV–40.5kV switchgear systems, including Ring Main Units (RMU), Gas-Insulated Switchgear (GIS), and Air-Insulated Switchgear (AIS).

Engineered and manufactured by Cotenele International Trade (Wenzhou) Co., Ltd, this mechanism integrates a dual-spring stored energy system (closing tension spring + opening compression spring), ensuring fast, stable, and repeatable switching performance in demanding power distribution environments such as substations, renewable energy projects, and industrial grids.

1.Mechanical life exceeding 10, 000 operations

2.Stable operation independent of operator speed

3.Designed for vacuum and SF₆ circuit breakers

4.Proven in wind power, photovoltaic, railway, and mining projects

Product Model

Why is this mechanism so crucial in real-world projects?

In medium-voltage power distribution systems, the operating mechanism directly determines the reliability of the circuit breaker.

Our projects include:

110kV substations

Offshore wind power control centers

Large-scale photovoltaic power plants (GW-level)

In our past project experience, over 70% of circuit breaker failures are related to mechanical instability or operational delays.

Therefore, our 33kV Medium Voltage Circuit Breaker Operating Mechanism focuses on the following characteristics:

Consistent high-speed response

Mechanical durability under frequent switching operations

Fail-safe interlocking mechanisms to prevent misoperation

Operating Instructions:

It is very important for safety and equipment longevity of the proper operation of the mechanism. The following instructions outline the standard procedures for manual operation.

A. Energy storage (charging)

Manual operation: Insert the dedicated operating handle into the charging shaft located at the bottom right of the mechanism. Turn the handle clockwise and rotate the handle when a 'click' sound is heard then stop. this means the energy storage device is locked. Please confirm the 'charge/discharge' indicator displays a 'charge' status.

Electrical operation: Must ensure that the secondary control circuit is correct and powered on first. When power is supplied to the circuit breaker actuator, the motor will run automatically. Automatically stop after charging is completed.

B. Closing Operation

Manual: Press the green push button firmly. The closing spring will release its energy, driving the breaker into the closed position. Observe the mechanical indicator on the mechanism to confirm the "Closed" status.

Electrical: The operating actuator will provide electrical signals to the closed electromagnetic coil. The electromagnetic piston will hit the lock buckle, resetting the circuit breaker actuator, and the process is exactly the same as manual operation.

C. Opening Operation

Manual: Press the red button forcefully. Opening the spring will release its stored energy, causing the circuit breaker to jump to the open position.

Electrical: Send a signal to the opening (shunt trip) solenoid coil. The breaker will open immediately.

Compliance Note

All operations must be performed in compliance with the interlock sequences when an isolator is present. The 33KV Medium Voltage Circuit Breaker Operating Mechanism is designed to prevent operations that could lead to dangerous switching configurations. This equipment is designed in accordance with international standards, including GB1984 and GB/T1985, ensuring performance and safety compliance in high-voltage AC networks.

Appearance and dimensions

Compliance and Standards

This operating mechanism is designed and tested in accordance with:

GB1984 – AC High Voltage Circuit Breakers

GB/T1985 – High Voltage AC Disconnectors

Combined with company certifications:

ISO9001 (Quality)

ISO14001 (Environmental)

ISO45001 (Occupational Health and Safety)

Applications

Widely used in:

Power substations (10kV–110kV systems)

Renewable energy (wind / solar farms)

Railway and metro power supply

Petrochemical plants

Mining and heavy industry

Why Choose Cotenele?

1.Real Manufacturing Capability

30, 000㎡ production base

In-house R&D for core switchgear components

2.Proven Engineering Experience

Supplied to:

Wind power projects

Photovoltaic bases (GW-scale)

International substation projects

3.Continuous Innovation

3 generations of RHSV mechanism upgrades

Multiple patented designs

4.Focus on Green Technology

Environmental-friendly switchgear development

Supporting global low-carbon power systems

Products Show