Siemens 3VA5195-5EC31-0AA0 0A 3-Pole 3 V Circuit Breaker Potential Transformer

Introducing the Siemens 3VA5195-5EC31-0AA0, a purpose-built, three-pole device that fuses a circuit breaker with a built-in potential transformer. Designed for three-phase systems, this compact unit provides reliable protection while delivering local voltage sensing to protective relays and meters.

The 3VA5195-5EC31-0AA0 supports a 0 A current rating and a 3 V voltage rating, making it suitable for applications where precise, low-current sensing is required in conjunction with switching protection. With three poles, it covers all phases in a standard three-phase setup, simplifying wiring and panel layout.

Key specifications

• Part number: 3VA5195-5EC31-0AA0
• Poles: 3
• Current rating: 0 A
• Voltage rating: 3 V
• Type: Circuit Breaker with integrated Potential Transformer (PT)

Why this integrated Siemens unit stands out

Combining protection and sensing in one enclosure reduces installation complexity, minimizes wiring, and speeds up commissioning. The integrated potential transformer provides accurate auxiliary voltage for metering and relay logic without requiring separate PT components. This translates into tighter protection coordination and easier maintenance in busy control panels.

Ideal use cases

• Three-phase switchgear and control panels where local voltage sensing is needed for relays and meters
• Industrial automation environments that require compact protection + measurement solutions
• Retrofits in existing installations where space or wiring convenience is a constraint
• Lab and testing setups for relay testing and calibration with a ready-built PT supply

Tips for installation and care

• Verify the device is compatible with your panel’s voltage and protection scheme before installation
• Follow Siemens wiring diagrams to connect the potential transformer to the control relays and metering equipment
• Ensure secure mounting and proper clearance for three-pole devices to maintain reliable operation
• Periodically check connections and inspect for signs of wear in high-traffic electrical panels

For engineers and technicians designing robust protection schemes, the Siemens 3VA5195-5EC31-0AA0 offers a compact, integrated solution that aligns with modern control architectures. Tap into reliable Siemens engineering for streamlined protection, accurate sensing, and efficient panel layouts.