Siemens 3VA1110-5EF32-0AA0 3VA11 Series Molded Case Circuit Breaker 100A 3P 55kA

The Siemens 3VA1110-5EF32-0AA0 is a robust 3-pole molded case circuit breaker (MCCB) from the 3VA11 series, designed for reliable circuit protection in demanding industrial environments. This 100A breaker boasts a significant breaking capacity of 55kA at 415V, ensuring safety and operational continuity. Its key advantages lie in its high performance, compact design, and advanced trip unit technology, making it a superior choice for various power distribution applications.

Product Specifications

| Parameter                    | Specification                                |

| :--------------------------- | :------------------------------------------- |

| Product Type                 | Molded Case Circuit Breaker (MCCB)           |

| Series                       | 3VA11                                        |

| Model Number                 | 3VA1110-5EF32-0AA0                           |

| Rated Current (In)           | 100 A                                        |

| Number of Poles              | 3 (3-pole)                                   |

| Breaking Capacity (Icu)      | 55 kA at 415V                                |

| Trip Unit Type               | Electronic (ETU)                             |

| Rated Voltage (Ue)           | Up to 600V AC (specific to application)      |

| Frequency                    | 50/60 Hz                                     |

| Mounting Type                | Fixed                                        |

| Connection Type              | Screw terminals                              |

| Protection Functions         | Overcurrent (LSI), undervoltage, earth fault |

| Standards                    | IEC 60947-2                                  |

| Enclosure Material           | High-impact thermoplastic                    |

| Operating Temperature Range  | -25°C to +70°C                               |

Core Features & Market Positioning

The Siemens 3VA1110-5EF32-0AA0 distinguishes itself through its advanced electronic trip unit (ETU), which offers highly accurate and adjustable overcurrent protection, including long-time (L), short-time (S), and instantaneous (I) trip functions. This superior protection capability minimizes nuisance tripping while ensuring swift response to dangerous fault conditions, a critical factor in industrial settings where equipment downtime is costly. Compared to thermal-magnetic breakers, the ETU provides greater flexibility and precise control over protective settings, allowing for better system coordination and enhanced safety. Its robust construction and compliance with international standards like IEC 60947-2 underscore its reliability and suitability for heavy-duty applications. The compact footprint of the 3VA11 series also facilitates space-saving installations in control panels and switchgear, a significant advantage in modern industrial design.

Key Application Scenarios

This 100A, 3-pole MCCB is ideally suited for a broad spectrum of industrial power distribution and motor protection applications. Its high breaking capacity of 55kA makes it a reliable choice for main incoming feeders, distribution boards, and branch circuit protection in facilities with significant fault current potential. Common use cases include protecting transformers, generators, and busbars within manufacturing plants, data centers, and commercial buildings. It is also effectively employed in the protection of large motor loads, where precise overload and short-circuit coordination are paramount to prevent damage and ensure operational continuity. The adjustable LSI settings on the ETU allow for tailored protection schemes that can be optimized for specific load characteristics and system requirements, further broadening its applicability across diverse industrial sectors.

Practical System Integration Guidance

Integrating the Siemens 3VA1110-5EF32-0AA0 into existing electrical systems is straightforward due to its standard mounting dimensions and connection options. The breaker typically utilizes screw terminals for power connections, accommodating appropriate cable sizes for its 100A rating. Proper torque values, as specified by Siemens, must be applied to ensure secure and reliable electrical contact. For systems requiring remote monitoring or control, the 3VA11 series often supports optional accessories such as auxiliary and alarm switches, shunt trip coils, and communication modules. These modules, when integrated with a compatible communication gateway (e.g., PROFIBUS, Modbus), enable seamless data exchange with SCADA or building management systems, facilitating diagnostics and remote operation. Commissioning involves verifying all protective settings on the ETU via the breaker's local interface or connected software, ensuring they align with the system's design parameters and safety standards.

Operation and Risk Mitigation

Safe operation of the Siemens 3VA1110-5EF32-0AA0 relies on adherence to proper installation and maintenance procedures. Before any maintenance or inspection, ensure the circuit breaker is de-energized and isolated from the power source, with all associated control circuits safely discharged. The breaker is equipped with a clear trip-free mechanism, meaning it cannot be held closed against a fault condition. When a fault occurs, the breaker will trip, indicated by the position of the operating handle. If the breaker fails to trip, immediate investigation is required to identify the cause, which could range from incorrect ETU settings to internal component failure. Regular visual inspections for dust accumulation, damage to the enclosure, or loose connections are recommended. The ETU's self-diagnostic capabilities can often flag internal issues, which should be addressed by qualified personnel.

Scalability & Long-Term Value

The 3VA11 series, including the 3VA1110-5EF32-0AA0, offers significant long-term value through its inherent scalability and compatibility with Siemens' broader industrial automation portfolio. The ETU's adjustable settings allow for easy recalibration should load requirements change, avoiding the need for a complete breaker replacement. For facilities looking to implement advanced Industrial Internet of Things (IIoT) solutions, communication-enabled versions of these breakers can be integrated into digital platforms, providing real-time operational data, predictive maintenance insights, and remote monitoring capabilities. This integration enhances system efficiency, reduces downtime, and supports smart grid functionalities. Furthermore, the robust construction and quality engineering characteristic of Siemens products ensure a long operational lifespan, minimizing lifecycle costs and maximizing return on investment for industrial operations.

FAQs

What is the breaking capacity of the Siemens 3VA1110-5EF32-0AA0?

The Siemens 3VA1110-5EF32-0AA0 molded case circuit breaker has a rated breaking capacity of 55 kA at 415V. This high capacity ensures it can safely interrupt severe short-circuit currents, protecting downstream equipment.

This specification is crucial for system designers to ensure the breaker can handle potential fault levels in the electrical installation. It provides a significant safety margin for most industrial applications.

Understanding this rating is vital for compliance with electrical codes and for maintaining the integrity of the power distribution system, preventing catastrophic failures.

What type of trip unit does the 3VA1110-5EF32-0AA0 feature?

This breaker utilizes an advanced electronic trip unit (ETU). The ETU provides sophisticated overcurrent protection with adjustable settings for long-time, short-time, and instantaneous trips.

This electronic control offers superior precision and flexibility compared to traditional thermal-magnetic breakers. It allows for fine-tuning protection to match specific load requirements and coordination needs.

The ETU facilitates diagnostics and can support communication for integration into smart electrical systems, enhancing operational efficiency and safety.

Can the Siemens 3VA1110-5EF32-0AA0 be used for motor protection?

Yes, the 3VA1110-5EF32-0AA0 is suitable for motor protection applications. Its adjustable electronic trip unit allows for customized overload protection settings.

The breaker's ability to configure long-time (L) and short-time (S) delay functions is critical for preventing nuisance tripping during motor start-up while still offering robust protection against sustained overloads.

Its high breaking capacity also ensures safety during potential short-circuit faults that can occur in motor circuits, safeguarding both the motor and the overall system.

What are the main advantages of the 3VA11 series MCCBs?

The 3VA11 series offers a combination of high breaking capacity, compact design, and advanced electronic trip units. These features provide reliable protection and operational flexibility.

The electronic trip unit allows for precise, adjustable settings, enhancing system coordination and reducing downtime. Its advanced diagnostics also contribute to easier troubleshooting.

Compact dimensions of the 3VA11 breakers save valuable space in control panels and switchgear, a key benefit in modern industrial installations where space efficiency is paramount.

How do I set the protection parameters on the 3VA1110-5EF32-0AA0?

Protection parameters are typically set using the local HMI on the breaker or via specialized software connected to it. The electronic trip unit (ETU) interface allows adjustment of L, S, and I trip settings.

Users can configure the rated current, time delays, and trip thresholds to match the specific load and system requirements. Refer to the product manual for detailed instructions on setting these parameters.

Accurate setting of these parameters is crucial for effective circuit protection and ensuring the breaker operates correctly in fault conditions without causing unnecessary disruptions.

What standards does the Siemens 3VA1110-5EF32-0AA0 comply with?

This circuit breaker complies with international standards, most notably IEC 60947-2. This standard governs low-voltage switchgear and controlgear, specifically concerning circuit breakers.

Compliance with IEC 60947-2 ensures the breaker meets stringent performance, safety, and reliability requirements for industrial applications worldwide.

Adherence to these standards is essential for system design, integration, and certification, assuring users of the product's quality and dependability in critical electrical infrastructure.

Is this breaker suitable for DC applications?

The Siemens 3VA1110-5EF32-0AA0, as a standard molded case circuit breaker, is primarily designed for AC applications. Using it in DC systems requires specific configurations and may not be suitable without specialized variants.

DC circuits present different arc-quenching challenges compared to AC. The arc in a DC circuit does not naturally pass through zero, making it harder to extinguish.

For DC applications, it is essential to consult Siemens' product documentation or contact their technical support to determine if a specific DC-rated breaker or modification is available and appropriate.

What are the physical dimensions of the 3VA1110-5EF32-0AA0?

The 3VA11 series breakers are known for their compact design, optimizing panel space. Specific dimensions for the 3VA1110-5EF32-0AA0 would be detailed in the official product datasheet.

These dimensions are critical for panel builders and system integrators to ensure proper physical fit within enclosures and for maintaining required clearances and creepage distances.

Detailed dimensional drawings and specifications are available in the Siemens technical documentation, which should be consulted before installation.

Can the 3VA1110-5EF32-0AA0 be remotely controlled or monitored?

Yes, the 3VA1110-5EF32-0AA0 can support remote control and monitoring capabilities through optional accessories. These typically include auxiliary contacts, alarm contacts, and communication modules.

By integrating communication modules (e.g., PROFIBUS, Modbus), the breaker can be connected to building management systems or SCADA for real-time data acquisition and remote operation.

This connectivity enables advanced features like remote tripping, status indication, and diagnostic data analysis, crucial for modern smart grids and IIoT integration.

What is the operating temperature range for this circuit breaker?

The Siemens 3VA1110-5EF32-0AA0 generally operates within a temperature range of -25°C to +70°C. However, derating of the current may be necessary at higher ambient temperatures.

Operating the breaker outside its specified temperature range can affect its performance, accuracy, and lifespan. It is crucial to ensure the installation environment is within these limits for optimal functionality.

Consulting the product's technical datasheet is recommended for precise information on temperature derating curves and any environmental considerations for installation.