Siemens 3VA1140-6MH32-0AA0 3VA11 Series Distribution Circuit Breaker 40A 160A 3P 85kA
The Siemens 3VA1140-6MH32-0AA0 is a high-performance 3-pole distribution circuit breaker from the 3VA11 series, designed for robust protection in industrial and commercial electrical systems. This unit boasts a rated current of 40A and a breaking capacity of 85kA, ensuring reliable safety against overcurrents and short circuits. Its advanced thermal-
Product Specifications
| Parameter | Value |
| :----------------------- | :---------------------------------------- |
| Product Type | Distribution Circuit Breaker |
| Series | 3VA11 Series |
| Manufacturer | Siemens |
| Model Number | 3VA1140-6MH32-0AA0 |
| Number of Poles | 3 |
| Rated Current | 40A |
| Maximum Rated Current | 160A (Frame Size) |
| Breaking Capacity (Icu) | 85kA at 400/415V AC |
| Trip Unit Type | Thermal-Magnetic (TM) |
| Adjustable Overload | Yes |
| Adjustable Short Circuit | Yes |
| Mounting Type | Panel Mount (Fixed) |
| Connection Type | Screw Terminals |
| Standards | IEC 60947-2 |
| Degree of Protection | IP20 (without cover) |
| Operating Temperature | -25 to +70 °C |
Core Features & Market Positioning
The Siemens 3VA1140-6MH32-0AA0 distinguishes itself through its superior breaking capacity of 85kA, offering exceptional fault current protection crucial for modern power distribution networks. Its thermal-magnetic trip unit, featuring adjustable overload and short-circuit settings, provides granular control over protection parameters, allowing for tailored system safeguarding and minimizing nuisance tripping. Positioned as a reliable and robust solution for medium to high-demand environments, the 3VA11 series emphasizes durability and performance, making it a preferred choice for system integrators and facility managers seeking long-term operational stability. The compact design also facilitates efficient panel space utilization, a significant advantage in space-constrained installations.
Key Application Scenarios
This 3VA11 circuit breaker is exceptionally well-suited for main and branch circuit protection in industrial facilities, including manufacturing plants, process control systems, and machine tools, where high fault currents are a common concern. It is also widely deployed in commercial buildings, data centers, and power distribution boards requiring reliable, high-capacity overcurrent and short-circuit protection. Applications involving motor control circuits and critical power supply lines benefit from its adjustable trip settings, allowing for precise coordination and protection against both sustained overloads and instantaneous short circuits.
Practical System Integration Guidance
For seamless integration, the Siemens 3VA1140-6MH32-0AA0 utilizes robust screw terminals for secure electrical connections. Ensure all connections are torqued to the manufacturer's specifications to prevent thermal degradation and ensure optimal conductivity. The fixed mounting design requires secure fastening to a suitable panel or busbar system. When configuring the thermal-magnetic trip unit, it is crucial to consult the Siemens documentation for appropriate overload (Ir) and short-circuit (Im) setting ranges to match the protected circuit's characteristics and upstream protection devices, ensuring selective coordination. Proper insulation and guarding of terminals are essential for safety during installation and maintenance.
Operation and Risk Mitigation
Operating the Siemens 3VA1140-6MH32-0AA0 involves straightforward manual operation via the toggle lever for ON/OFF states. In the event of a fault, the breaker will trip, indicated by the lever's position. To reset, the lever must be moved to the fully OFF position before being returned to the ON position. Risk mitigation is primarily achieved through the breaker's inherent design, including its high breaking capacity and adjustable trip settings, which prevent damage to equipment and personnel. Regular visual inspections for damage or contamination, along with periodic testing of the tripping mechanisms, are recommended to ensure continued reliable operation and prevent potential hazards.
Scalability & Long-Term Value
The Siemens 3VA11 series, including the 3VA1140-6MH32-0AA0, offers a degree of scalability through its compatibility with a range of optional accessories, such as auxiliary and alarm switches, and electronic trip units, which can be retrofitted to enhance functionality. This allows for adaptation to evolving system requirements or the integration of advanced monitoring capabilities. Its robust construction and adherence to IEC standards ensure long-term reliability and compatibility with other Siemens industrial automation components, supporting the longevity and maintainability of electrical infrastructure. Integration into modern digital platforms can be achieved through compatible communication modules, enabling IIoT functionalities for predictive maintenance and remote monitoring.
Frequently Asked Questions
What is the breaking capacity of the Siemens 3VA1140-6MH32-0AA0?
The Siemens 3VA1140-6MH32-0AA0 circuit breaker features a substantial breaking capacity of 85kA at 400/415V AC. This high rating is critical for safely interrupting severe short-circuit currents, protecting electrical infrastructure from catastrophic damage. It ensures that even under the most extreme fault conditions, the breaker can reliably isolate the circuit.
This significant fault current interruption capability makes it suitable for main power distribution points and areas prone to higher fault levels. It provides a robust safety margin for demanding industrial and commercial applications. Understanding this parameter is key to selecting the correct breaker for a given system's fault current potential.
The 85kA rating signifies a high level of protection, often required by electrical codes and standards for critical installations. It allows for the use of this breaker in situations where other, lower-rated breakers might fail, thus enhancing overall system safety and reliability.
How do I adjust the thermal and magnetic trip settings on the 3VA1140-6MH32-0AA0?
Adjustment of the thermal (overload) and magnetic (short-circuit) trip settings on the 3VA1140-6MH32-0AA0 is typically done via rotary knobs or DIP switches on the front of the unit. Consult the product manual for the specific adjustment procedure, as incorrect settings can compromise protection.
The thermal setting (Ir) determines the current level at which the breaker will trip due to sustained overload, adjustable within a defined range. The magnetic setting (Im) dictates the instantaneous trip threshold for short circuits, also adjustable to prevent nuisance tripping while ensuring rapid fault clearance.
Precise adjustment is vital for selective coordination with other protective devices in the system. Over-adjustment can lead to equipment damage, while under-adjustment may result in unwanted tripping. Always refer to load calculations and system design specifications.
What are the typical applications for the Siemens 3VA1140-6MH32-0AA0?
This circuit breaker is commonly employed in main distribution panels and sub-distribution boards within industrial facilities. Its high breaking capacity makes it ideal for protecting equipment and personnel from severe fault conditions.
It is also frequently used for the protection of industrial motors, transformers, and sensitive electronic equipment where precise overcurrent protection is required. The adjustable settings allow for customization to specific load characteristics.
Applications in commercial buildings, data centers, and infrastructure projects also benefit from its robust performance and reliability. It serves as a crucial component in ensuring continuous and safe power delivery for essential services.
