09.Double Bus Double Breaker Configuration

What is busbar?

A busbar is a metallic conductor (usually copper or aluminium) used in substations to collect and distribute electric power. It connects multiple incoming and outgoing transmission lines and equipment like transformers within the substation.

Since the busbar is a critical node in the power system, any fault on it can cause widespread outages. Therefore, fast and reliable protection is essential.

Double Bus Double Breaker Configuration

First, we look at the  very simple representation of busbar configuration.

A Double Bus, Double Breaker (DBDB) configuration is commonly used in electrical substations to provide high reliability and flexibility in the power system. Here's a detailed breakdown of how it works.

You can see the Bays  are used to explain  the working principle.

• Line 1

• Line 2

• Transformer 1

• Transformer 2

More

• 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

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