Siemens 5SV3347-6KK12 RCBO Circuit Breaker 4P 80A 30mA

The Siemens 5SV3347-6KK12 RCBO is a critical component for safeguarding electrical installations, offering advanced protection against overcurrents and residual currents. This four-pole, 80A rated circuit breaker with a 30mA sensitivity provides robust safety and reliability for demanding industrial environments. Its key advantages include comprehensive fault detection, enhanced operational safety, and seamless integration into modern electrical systems, making it an indispensable choice for professionals prioritizing performance and protection.

Product Specifications

| Feature                  | Specification                               |

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

| Product Type             | Residual Current Operated Circuit Breaker (RCBO) |

| Pole Configuration       | 4-Pole                                      |

| Rated Current (In)       | 80 A                                        |

| Residual Current (IΔn)   | 30 mA                                       |

| Breaking Capacity (Icn)  | 10 kA                                       |

| Voltage Rating (Un)      | 400 V AC                                    |

| Tripping Characteristic  | Type AC                                     |

| Frequency                | 50/60 Hz                                    |

| Operating Temperature    | -25 to +45 °C                               |

| Terminal Type            | Screw Terminal                              |

| Mounting Type            | DIN Rail                                    |

| Standards                | IEC/EN 61009-1, IEC/EN 60898-1, IEC/EN 61009-2-1 |

Core Features & Market Positioning

The Siemens 5SV3347-6KK12 distinguishes itself through its dual protection capability, combining the functions of an Miniature Circuit Breaker (MCB) and a Residual Current Device (RCD) in a single, compact unit. This integration simplifies installation and panel space, a significant advantage in crowded industrial electrical cabinets. Its 10 kA breaking capacity ensures it can safely interrupt fault currents, offering superior protection against short circuits and overloads compared to standard MCBs. The 30mA residual current sensitivity is crucial for personnel protection against electric shock, a primary concern in many industrial settings. Siemens' reputation for quality and reliability further solidifies the 5SV3347-6KK12's market position as a premium protective device for critical infrastructure.

Key Application Scenarios

This RCBO is ideally suited for protecting electrical circuits in demanding industrial environments, including manufacturing plants, data centers, and commercial buildings. It is particularly effective in circuits where the risk of fire due to arcing faults or the danger of electric shock to personnel is high. Applications include the protection of motor circuits, lighting systems, and power distribution boards. Its four-pole design makes it suitable for three-phase systems, ensuring comprehensive protection across all live conductors and the neutral. The 80A rating makes it appropriate for circuits with substantial power demands.

Practical System Integration Guidance

Installation of the Siemens 5SV3347-6KK12 RCBO requires adherence to standard electrical wiring practices for four-pole devices. Ensure the main power supply is disconnected before commencing any work. Connect the incoming power to the designated line terminals and outgoing power to the load terminals, observing the correct phase sequence for three-phase applications. The neutral conductor must also be connected to the dedicated neutral terminal. Proper grounding of the entire system is paramount for the effective operation of the residual current protection function. For optimal performance, ensure the breaker is securely mounted on a standard DIN rail, providing a stable foundation.

Operation and Risk Mitigation

The 5SV3347-6KK12 operates by continuously monitoring the balance of current flowing in the live and neutral conductors. If an imbalance exceeding 30mA occurs, indicative of a leakage current to earth, the device will rapidly trip, disconnecting the power supply. This significantly mitigates the risk of electric shock, fire hazards from earth faults, and damage to equipment. In the event of a trip, identifying the cause of the residual current is the first step; this could be insulation degradation, a faulty appliance, or accidental contact with live parts. Resetting the breaker should only be attempted after the fault has been identified and rectified. Regular testing of the residual current function using the integrated test button is recommended to ensure continued operational readiness.

Scalability & Long-Term Value

The Siemens 5SV3347-6KK12 integrates seamlessly into Siemens' broader industrial automation and electrical distribution ecosystem. Its adherence to international standards ensures compatibility with a wide range of other protective devices and switchgear from various manufacturers, offering flexibility in system design and upgrades. While the RCBO itself is a dedicated protective device, its value is amplified when part of a smart electrical infrastructure. It can be incorporated into systems that leverage digital monitoring and control, contributing to predictive maintenance and energy management strategies within an Industry 4.0 framework. The robust construction and proven reliability of Siemens products ensure long-term operational value and reduced downtime.

Frequently Asked Questions

What is the primary function of the Siemens 5SV3347-6KK12 RCBO?

The Siemens 5SV3347-6KK12 RCBO provides combined overcurrent and residual current protection. It protects against electrical shocks and prevents fires caused by earth faults. The device also safeguards against overloads and short circuits.

This integrated protection simplifies electrical installations and reduces the need for separate devices. Its 30mA sensitivity is crucial for personal safety in many applications. The 80A rating suits medium to high current loads.

Its four-pole design ensures protection across all live conductors and the neutral in three-phase systems. This comprehensive approach enhances overall electrical system safety and reliability.

How does the 30mA residual current sensitivity protect users?

A 30mA residual current is considered the threshold above which electric shock can become dangerous to humans. When the RCBO detects an imbalance of 30mA or more between the live and neutral conductors, it signifies current is leaking to earth.

This leakage could be through a person touching a faulty appliance, or through damaged insulation. The RCBO trips extremely rapidly, typically within milliseconds, interrupting the circuit before a serious shock can occur.

This rapid disconnection is vital for preventing injury or fatality in environments where personnel are in close proximity to electrical equipment, such as industrial floors or workshops.

What are the key technical specifications for the Siemens 5SV3347-6KK12?

This RCBO features a 4-pole configuration, suitable for three-phase applications. Its rated current is 80A, and it offers a residual current sensitivity of 30mA.

The breaking capacity is 10 kA, meaning it can safely interrupt fault currents of this magnitude. It operates on a standard voltage of 400V AC and is designed for a frequency of 50/60 Hz.

The device is built to withstand operating temperatures from -25 to +45 °C and mounts conveniently on a standard DIN rail using screw terminals for secure connections.