02.Pantograph type Disconnectors /Isolators

• 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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• Collecting Project Correspondance

A Pantograph Type Disconnector is a high-voltage isolator designed to interrupt the circuit at a single point with a vertically moving arm that engages or disengages a fixed contact. Unlike horizontal double break designs, the pantograph disconnector operates in a vertical plane, allowing for a compact footprint and minimal phase spacing—ideal for installations with limited horizontal space. Its upward or downward motion creates a visible air gap that ensures safe disconnection. This type of disconnector provides reliable performance in high-voltage substations, especially where vertical clearance is available &  suspension type Pipe Busbar Arrangment. Operation can be either manual or motorized, depending on the application requirements.

Advantages

• Offers reliable isolation with clear visual confirmation for improved operational safety.

• Requires less horizontal installation space due to its vertical, compact design.

• The streamlined structure enhances mechanical stability and system integration.

• Ensures fast and efficient disconnection, especially suitable for compact substations.

Disadvantages

• Design complexity is greater compared to single-break or horizontal types.

• Higher installation cost due to the need for specialized components.

• Maintenance may be slightly more challenging due to vertical movement and positioning.

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

Operation:

The Pantograph Type Disconnector operates by moving a contact arm vertically to engage or disengage a fixed contact point, thereby interrupting the circuit at a single location. It must only be operated when the circuit is de-energized to ensure safe and effective isolation. Unlike horizontal designs, the pantograph mechanism moves in a vertical direction, making it well-suited for compact substations with limited horizontal space

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 .