The Siemens 3VA9157-0FK21 is a door-mounted rotary operator designed to work seamlessly with Siemens 3VA1 100/160 circuit breakers. This component is an essential part of the circuit breaker system, providing a convenient and reliable method of manually opening and closing the breaker for maintenance, testing, or safety procedures.

• Door-Mounted Design

This operator is specifically designed to be mounted on the door of the enclosure housing the circuit breaker. It lets users control the circuit breakers ON and OFF positions without opening the enclosure, enhancing safety and convenience.

• Manual Control and Locking Mechanism

Users can manually turn the rotary operator to switch the circuit breaker ON or OFF as needed. Additionally, it includes a locking mechanism to secure the breaker in the desired position, preventing unauthorised or accidental changes.

Application Areas of the Siemens 3VA9157-0FK21 Door-Mounted Rotary Operator

The Siemens 3VA9157-0FK21's manual control capabilities make it a valuable tool for safely and conveniently operating circuit breakers in a variety of settings, such as:

• Industrial Facilities: The 3VA9157-0FK21 operator is widely used in industrial settings where Siemens 3VA1 100/160 circuit breakers are employed. It allows maintenance personnel to safely control and isolate electrical circuits during maintenance and repairs.
• Commercial Buildings: In commercial buildings and extensive facilities, such as malls and office complexes, these operators can be installed on circuit breaker enclosures, providing a means to quickly disconnect power during emergencies or scheduled maintenance.
• Power Distribution Centres: These operators are commonly found in power distribution centres and electrical panels, allowing operators to isolate specific circuits or equipment for maintenance or troubleshooting.
• Renewable Energy: For solar and wind energy installations, these operators control circuit breakers in inverters, ensuring the safe operation and maintenance of renewable energy systems.
• Utilities: Electrical utilities utilise these operators to control and manage circuit breakers in substations and distribution systems, enabling them to respond to power outages and perform maintenance tasks efficiently.
• Data Centres: In data centre facilities, where continuous uptime is crucial, these operators control circuit breakers in backup power systems, enabling quick and safe switching to backup power sources when needed.
• Emergency Systems: The operators can be part of emergency systems, ensuring that critical equipment is powered on or off during emergencies and power disturbances.

For more information please check the datasheets.