01.Horizontal type Double Break Disconnectors

• Single Busbar Configuration

• Single Busbar with Bus section Configuration

• Single Busbar with Transfer busbar configuration

• Single Busbar with Bus section + Transfer bus coupler + Section Isolator configuration

• Double Busbar with Bus coupler Configuration

• Double Busbar with Bus coupler + Bypass Isolator Configuration

• Double Busbar with Bus coupler + Transfer Buscoupler configuration

• One and Half Breaker Busbar Configuration

Busbar Configuration

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A Horizontal Double Break Disconnector is a type of isolator used in high-voltage electrical systems that interrupts the circuit at two separate points. It uses a central movable arm that disconnects two fixed contacts, offering a clear visual gap for enhanced safety. This configuration ensures dependable isolation, especially in compact substation layouts. Its symmetrical design helps improve structural balance and minimize phase clearance. These disconnectors are commonly used in systems where space is limited but reliability is crucial. Operation can be manual or motor-driven depending on system requirements.

Advantages

• Offers dual-point isolation for better operational safety.

• Requires less installation space due to compact structure.

• The balanced design enhances mechanical durability.

• Ensures clear visual confirmation of disconnection.

Disadvantages

• Design complexity is greater than that of single-break types.

• Higher installation cost due to additional components.

• Maintenance may be slightly more challenging.

• Must be operated when the system is fully de-energized, as it cannot interrupt load current.

Operation:

The double break disconnector operates by moving a central contact arm to simultaneously break the circuit at two fixed points. It must be operated only when the circuit is de-energized to ensure safe isolation. Please note that ,the connector will rotate in the horizontal direction. 

Auxiliary Contacts :

Auxiliary contacts are secondary switching contacts used in conjunction with primary switching devices like disconnectors or circuit breakers. They provide status signals (open or closed) to control systems or indicator panels. These contacts do not carry load current but help in automation and monitoring. They are essential for interlocking, safety logic, and remote supervision. The number of NC, NO , NOC ,NCO depends based on the specific requiremnets. You can see the operation of the Auxiliary contacts .