Siemens 5SV4347-0 Earth Leakage RCBO 4P 80A 30mA

The Siemens 5SV4347-0 Earth Leakage RCBO 4P 80A 30mA is a sophisticated residual current circuit breaker with overcurrent protection, engineered for robust safety and reliable operation in demanding industrial and commercial environments. This four-pole device offers simultaneous protection against earth faults, short circuits, and overloads, making it an essential component for safeguarding personnel and sensitive electrical equipment. Key advantages include its high breaking capacity, sensitive earth fault detection at 30mA, and versatile application across various electrical installations. Its technical parameters feature a rated current of 80A, a rated residual operating current of 0.03A, and a breaking capacity of 10kA, ensuring compliance with stringent safety standards.

Product Specifications

| Feature                        | Specification                                  |

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

| Product Type                   | Earth Leakage RCBO (4-Pole)                    |

| Siemens Model                  | 5SV4347-0                                      |

| Rated Current (In)             | 80 A                                           |

| Rated Residual Operating Current | 30 mA                                          |

| Number of Poles                | 4                                              |

| Rated Breaking Capacity (Icn)  | 10 kA                                          |

| Rated Voltage (Un)             | 400 V AC                                       |

| Frequency                      | 50/60 Hz                                       |

| Tripping Characteristic        | Type A                                         |

| Mounting Type                  | DIN Rail                                       |

| Terminal Type                  | Screw Terminals                                |

| Degree of Protection           | IP20 (enclosure)                               |

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

Core Features & Market Positioning

The Siemens 5SV4347-0 distinguishes itself through its Type A tripping characteristic, which provides enhanced protection against pulsating DC residual currents, a common occurrence in modern electronic equipment. This advanced detection capability, coupled with its robust 10kA breaking capacity, positions it as a superior choice for applications where standard Type AC devices may fall short. The four-pole configuration ensures complete isolation of all phases and the neutral conductor, a critical safety requirement for many industrial systems. Its reliability and adherence to international standards, such as IEC/EN 61009-1, underscore Siemens' commitment to quality and safety in electrical protection. The market views this RCBO as a high-performance, dependable solution for critical infrastructure and complex industrial power distribution networks.

Key Application Scenarios

This Siemens 5SV4347-0 RCBO is ideally suited for protecting final circuits in industrial facilities, commercial buildings, and areas with a higher risk of earth leakage faults. Common applications include the protection of machinery with electronic drives, lighting systems, and general power distribution where comprehensive safety is paramount. It is particularly valuable in environments where sensitive electronic equipment is in operation, and the detection of pulsating DC residual currents is necessary. Its 80A rating makes it suitable for circuits with substantial current demands, such as those supplying large motors or distribution boards.

Practical System Integration Guidance

Integrating the Siemens 5SV4347-0 4-pole RCBO into existing electrical systems is straightforward due to its standard DIN rail mounting and screw terminal connections. Proper wiring involves connecting the incoming power supply to the line terminals and the outgoing load to the corresponding load terminals for each of the four poles. Crucially, the neutral conductor must be connected to the dedicated neutral terminal for correct operation. It is essential to ensure that the incoming neutral conductor is connected to the neutral terminal of the RCBO and not bypassed, as this will compromise earth leakage detection. Following local wiring regulations and ensuring adequate conductor sizing is imperative for safe and effective installation.

Operation and Risk Mitigation

The primary function of the Siemens 5SV4347-0 is to detect residual earth fault currents and interrupt the circuit within milliseconds, preventing electric shock and fire hazards. The 30mA sensitivity is designed to protect individuals from dangerous contact voltages. In the event of an earth fault, the RCBO will trip, necessitating a manual reset. Overload and short-circuit protection are also integrated, providing comprehensive overcurrent safeguarding. Regular testing of the RCBO using its integrated test button is recommended to ensure its continued operational integrity and to mitigate the risk of failure during an actual fault event.

Scalability & Long-Term Value

As part of Siemens' extensive portfolio of circuit protection devices, the 5SV4347-0 RCBO offers excellent compatibility with other Siemens components within the 5SV series and the broader SENTRON protection devices. This compatibility ensures seamless integration into larger electrical distribution systems and allows for future expansion or upgrades without compromising system integrity. While this specific RCBO is a discrete protection device, its robust design and high breaking capacity contribute to the long-term reliability and safety of the electrical installation, reducing the likelihood of costly downtime and equipment damage.

Frequently Asked Questions (FAQs)

1. What is the primary function of the Siemens 5SV4347-0 RCBO?

The Siemens 5SV4347-0 RCBO provides essential protection against earth faults. It detects imbalances in current flow, tripping the circuit to prevent electric shock.

It also incorporates overcurrent protection, safeguarding against both overloads and short circuits. This dual functionality makes it a comprehensive safety device for electrical installations.

The 30mA sensitivity ensures rapid disconnection, critical for personnel safety in various industrial and commercial settings.

2. Can the Siemens 5SV4347-0 be used in residential applications?

While highly effective, the 80A rating and 4-pole design are typically suited for higher current demands. Residential circuits often utilize single or double-pole RCBOs with lower current ratings.

However, for specific residential sub-circuits requiring higher capacity or four-pole isolation, such as in a large workshop or specialized areas, it could be applicable. Always consult local electrical codes and a qualified electrician for suitability.

Its advanced Type A tripping ensures protection against specific fault currents common in modern electronic devices, offering enhanced safety.

3. What is the difference between an RCD and an RCBO like the 5SV4347-0?

An RCD (Residual Current Device) primarily protects against earth leakage faults. An RCBO (Residual Current Breaker with Overcurrent Protection) integrates RCD functionality with overcurrent protection.

Therefore, the 5SV4347-0 not only detects earth faults but also trips due to overloads or short circuits. This dual protection simplifies panel design and wiring by combining two devices into one.

This comprehensive protection ensures that both personal safety from shocks and equipment integrity from electrical faults are managed by a single, reliable unit.

4. How do I reset the Siemens 5SV4347-0 after a trip?

After a trip, the operating lever will be in the OFF position. To reset, first ensure the fault condition has been cleared. Then, firmly push the lever upwards to the ON position.

If the RCBO trips again immediately upon resetting, it indicates the fault is still present. Do not repeatedly attempt to reset; troubleshoot the circuit for the underlying cause.

Regularly testing the RCBO using its built-in test button is crucial for maintaining its operational readiness and confirming proper function.

5. What does the 30mA rating signify on this device?

The 30mA rating refers to the residual current sensitivity, meaning the device will trip when it detects an earth leakage current of 30 milliamperes or more. This level is considered safe for human contact in most situations.

This sensitivity is crucial for protecting individuals from severe electric shock, as it intervenes much faster than a standard circuit breaker would for such low-level faults. It's a key indicator of its primary safety role.

The 30mA threshold is a standard for personal protection against indirect contact, ensuring compliance with safety regulations in many regions and applications.

6. Is the Siemens 5SV4347-0 compatible with other brands of circuit breakers?

While the 5SV4347-0 is designed to fit standard DIN rails, compatibility of its tripping mechanisms and performance with other brands' components isn't guaranteed. For optimal system integrity and safety, it's best practice to use components from the same manufacturer.

Siemens offers a comprehensive range of compatible protection and distribution devices within its SENTRON product line. Utilizing these ensures seamless integration and reliable overall system performance.

Mixing brands for critical protection devices can lead to unpredictable behavior or reduced overall protection effectiveness, potentially voiding warranties or certifications.

7. What is the breaking capacity of the 5SV4347-0, and why is it important?

The 5SV4347-0 has a breaking capacity of 10kA. This indicates the maximum fault current it can safely interrupt without sustaining damage.

A high breaking capacity is vital in industrial settings where fault currents can be significantly higher than in domestic environments. It ensures the device can safely handle and clear severe short circuits.

Selecting an RCBO with an adequate breaking capacity, like the 10kA of this model, is crucial for preventing catastrophic failures and ensuring the safety of the electrical installation and personnel.

8. What does "Type A" tripping characteristic mean for this RCBO?

Type A tripping characteristics mean this RCBO is sensitive to both sinusoidal AC residual currents and pulsating DC residual currents. This is an advancement over Type AC devices.

This enhanced sensitivity is important because many modern electronic devices (like LED drivers, power supplies, and variable speed drives) can generate pulsating DC fault currents. A Type A RCBO will detect these effectively.

Therefore, the 5SV4347-0 provides superior protection in environments with a high density of electronic equipment, where standard Type AC devices might not trip reliably.

9. How often should the test button on the 5SV4347-0 be used?

The test button should be operated at regular intervals, typically monthly, as recommended by safety standards and manufacturers. This is to ensure the internal tripping mechanism remains functional.

Operating the test button simulates an earth fault, causing the RCBO to trip. If it does not trip, the device may be faulty and require replacement.

Consistent testing provides peace of mind and helps maintain the highest level of safety for the protected circuit and its users.

10. What are the main advantages of using a 4-pole RCBO?

A 4-pole RCBO, like the 5SV4347-0, provides protection across all three phases and the neutral conductor. This ensures complete isolation of the circuit during a fault.

It is particularly important for three-phase systems or installations where the neutral conductor must also be switched and protected. This prevents hazardous situations that could arise if the neutral were left energized.

The simultaneous switching of all four conductors ensures that the circuit is fully disconnected from the supply, enhancing safety and preventing reverse current flow issues in certain configurations.