Siemens 3VA1110-5ED32-0AA0 Molded Case Circuit Breaker 100A 3P 55kA

The Siemens 3VA1110-5ED32-0AA0 is a high-performance molded case circuit breaker (MCCB) designed for robust electrical protection in industrial and commercial applications. This 3-pole, 100A breaker boasts a significant breaking capacity of 55kA, ensuring reliable safety against overcurrents and short circuits. Its advanced thermal-magnetic tripping mechanism provides precise and dependable protection, making it an ideal choice for safeguarding valuable equipment and ensuring operational continuity. The compact design facilitates straightforward installation in various distribution systems, while its durable construction guarantees a long service life even in demanding environments.

Product Specifications

| Parameter                 | Value                                     |

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

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

| Siemens Model Number      | 3VA1110-5ED32-0AA0                        |

| Rated Current (In)        | 100A                                      |

| Number of Poles           | 3 (Three)                                 |

| Breaking Capacity (Icu)   | 55kA                                      |

| Tripping Characteristic   | Thermal-magnetic                          |

| Frame Size                | 3VA11                                     |

| Voltage Rating            | Up to 690V AC (typical, consult datasheet) |

| Frequency                 | 50/60 Hz                                  |

| Terminal Type             | Screw terminals                           |

| Mounting Type             | DIN rail or base mounting                 |

| Protection Class          | IP20 (device), IP40 (enclosure)           |

| Certifications            | IEC, UL, CSA (typical, verify specific)   |

Core Features & Market Positioning

The Siemens 3VA1110-5ED32-0AA0 distinguishes itself through its superior breaking capacity of 55kA, offering a higher level of safety compared to many standard MCCBs in its class. This makes it particularly suitable for applications where fault currents are anticipated to be high, such as in facilities with large motor loads or near utility connection points. The integrated thermal-magnetic trip unit provides a reliable dual-stage protection mechanism: thermal overload protection responds to gradual current increases, while magnetic short-circuit protection offers instantaneous response to sudden, severe faults. This combination ensures comprehensive protection without unnecessary nuisance tripping, a critical factor for maintaining productivity in industrial settings. Siemens' reputation for quality and reliability further solidifies the 3VA series' market position as a trusted solution for critical power distribution.

Key Application Scenarios

This Siemens 3VA1110-5ED32-0AA0 MCCB is engineered for a wide array of demanding applications. It is extensively utilized in main distribution boards and sub-distribution panels within industrial plants, manufacturing facilities, and data centers, where dependable protection against overloads and short circuits is paramount. Its robust 55kA breaking capacity makes it an excellent choice for protecting transformers, large motors, and capacitor banks, safeguarding these critical assets from damage. Furthermore, it finds application in commercial buildings, hospitals, and infrastructure projects requiring high-reliability power distribution and enhanced safety measures. The 3-pole configuration is standard for three-phase systems, ensuring balanced protection across all conductors.

Practical System Integration Guidance

Integrating the Siemens 3VA1110-5ED32-0AA0 into existing electrical systems is streamlined due to its standardized design and connection options. For installation, ensure the breaker is securely mounted using either DIN rail clips or base mounting screws, with adequate clearance for ventilation. The terminals are designed for screw connections, requiring appropriate torque settings as per the product manual to ensure secure electrical contact and prevent overheating. For a 3-pole breaker, connect the incoming power supply to the top terminals (L1, L2, L3) and the outgoing load to the bottom terminals, maintaining correct phase sequencing. Always de-energize the circuit completely before performing any wiring or maintenance to prevent electrical shock. Ensure compliance with local electrical codes and standards during installation.

Operation and Risk Mitigation

Operating the Siemens 3VA1110-5ED32-0AA0 is straightforward, with a clearly marked ON/OFF lever for manual switching. Tripping occurs automatically when an overcurrent or short circuit condition is detected. To reset the breaker after a trip, ensure the fault has been cleared, then firmly move the lever to the OFF position before pushing it to the ON position. Risk mitigation is inherent in the breaker's design, preventing cascading failures and protecting personnel from electrical hazards. Common troubleshooting involves identifying the cause of tripping, which could be a persistent overload, a direct short circuit, or a faulty connected device. It is crucial to investigate the fault thoroughly before attempting to reset the breaker. Regularly inspect terminals for signs of corrosion or loose connections, and test the breaker periodically according to maintenance schedules to ensure its continued reliable operation.

Scalability & Long-Term Value

The Siemens 3VA series, including the 3VA1110-5ED32-0AA0, offers significant long-term value through its robust construction and potential for integration into modern electrical systems. While this specific model is a fixed-type MCCB, the broader 3VA family supports a range of accessories and communication modules that can enhance its functionality and scalability. For facilities looking to implement smart grid capabilities or advanced monitoring, compatible communication modules can enable remote control, status reporting, and energy metering. This allows for integration with Building Management Systems (BMS) or Industrial Internet of Things (IIoT) platforms, providing valuable data for energy efficiency analysis and predictive maintenance. The inherent durability of Siemens components ensures a long operational lifespan, reducing the need for frequent replacements and contributing to overall system cost-effectiveness.

Frequently Asked Questions

What is the primary function of the Siemens 3VA1110-5ED32-0AA0 circuit breaker?

The primary function is to protect electrical circuits from damage caused by overcurrents and short circuits. It automatically interrupts the flow of electricity when fault conditions are detected, preventing equipment damage and fire hazards.

How does the thermal-magnetic tripping mechanism work in this breaker?

The thermal element detects sustained overloads by sensing heat generated by current. The magnetic element provides rapid tripping for high-magnitude short circuits. This dual-action ensures comprehensive protection against different fault types.

What are the key advantages of using a 55kA breaking capacity breaker?

A higher breaking capacity, like 55kA, means the breaker can safely interrupt larger fault currents without being destroyed. This is crucial in systems with high fault current potential, offering enhanced safety and reliability.

What types of electrical systems is the 3VA1110-5ED32-0AA0 suitable for?

This 3-pole breaker is ideal for three-phase industrial and commercial power distribution systems. Applications include main and sub-distribution panels, protecting motors, transformers, and other critical equipment.

How is the Siemens 3VA1110-5ED32-0AA0 installed?

Installation typically involves DIN rail mounting or base mounting. Ensure secure connections via screw terminals and proper torque settings. Always follow local electrical codes and safety procedures during installation.

What does "3P" signify in the product designation?

"3P" stands for three poles, indicating that the circuit breaker is designed for use in three-phase electrical systems. It provides simultaneous switching for all three live conductors.

Can this circuit breaker be used for DC applications?

The Siemens 3VA1110-5ED32-0AA0 is primarily designed and rated for AC applications. Using it in DC systems can be dangerous and may not provide adequate protection. Always consult the product datasheet for specific application suitability.

What is the rated current of this breaker, and what does it mean?

The rated current (In) is 100A, meaning it is designed to carry a continuous current of up to 100 amperes under normal operating conditions. It will trip if the current exceeds this value by a significant margin for a sustained period.

How do I reset the breaker after it has tripped?

First, identify and rectify the cause of the overcurrent or short circuit. Then, move the operating lever fully to the OFF position and subsequently to the ON position to reset the breaker.

What is the significance of the "55kA" rating?

The "55kA" rating refers to the short-circuit breaking capacity (Icu). It indicates the maximum fault current the breaker can safely interrupt without sustaining damage, protecting downstream equipment and personnel.