3VA9978-0AA22 SIEMENS

The 3VA9978-0AA22 is a leading changeover switch accessory designed for use with Siemens 3VA4, 3VA5, and 3VA6 molded case circuit breakers (MCCBs). This accessory facilitates the seamless transfer of electrical loads between two power sources, ensuring uninterrupted operation in critical applications. Featuring changeover contacts of type HQ (7mm), it provides reliable and efficient switching performance. The changeover switch is crucial for applications requiring backup power or alternative power sources. It allows for a smooth transition between the main power supply and a secondary source, such as a generator or another grid connection. This accessory enhances the versatility of the 3VA MCCBs, making them suitable for a wider range of applications. Its robust design ensures durability and long-term reliability in demanding environments. The 3VA9978-0AA22 is easy to install and integrate with existing systems, minimizing downtime and maximizing operational efficiency. By providing a dependable means of switching between power sources, this accessory contributes to increased system resilience and reduced risk of power outages. It is an essential component for maintaining continuous power supply in critical infrastructure and industrial processes.