Siemens 5SV3444-6 Leakage protection switch 4P 40A 100mA

The Siemens 5SV4444-6 is a robust 4-pole, 40A leakage protection switch with a 100mA sensitivity, designed for superior electrical safety in demanding industrial and commercial environments. This Residual Current Device (RCD) offers advanced protection against indirect contact and fire hazards, ensuring operational continuity and personnel safety. Its key advantages lie in its high breaking capacity, reliable tripping performance, and compliance with stringent international standards. Crucial technical parameters include its rated voltage of 400V AC, a rated frequency of 50/60 Hz, and an impulse withstand voltage of 4kV. The 5SV4444-6 features a robust design for enhanced durability and a user-friendly interface for straightforward operation and monitoring.

Product Specifications

| Feature              | Specification                |

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

| Product Type         | Residual Current Device (RCD) |

| Manufacturer         | Siemens                      |

| Model Number         | 5SV4444-6                    |

| Poles                | 4                            |

| Rated Current (I n ) | 40A                          |

| Rated Residual Current (I n ) | 100mA                        |

| Rated Voltage (U n ) | 400V AC                      |

| Frequency            | 50/60 Hz                     |

| Breaking Capacity    | 6kA                          |

| Impulse Withstand Voltage | 4kV                          |

| Tripping Characteristics | Type AC                      |

| Mounting Type        | DIN Rail                     |

| Degree of Protection | IP20                         |

Core Features & Market Positioning

The Siemens 5SV4444-6 distinguishes itself in the market through its exceptional reliability and advanced protection capabilities. As a 4-pole RCD, it provides comprehensive safety for three-phase systems, offering superior protection against earth faults compared to its 2-pole counterparts. The 100mA sensitivity is ideal for applications where enhanced fire protection is a priority, significantly reducing the risk of electrical fires caused by insulation failures or residual currents. Its high breaking capacity of 6kA ensures that the device can safely interrupt fault currents, preventing damage to equipment and mitigating safety hazards. Siemens' reputation for quality engineering and adherence to rigorous safety standards further solidifies the 5SV4444-6's position as a dependable choice for critical electrical installations. This device is engineered for long-term performance, offering peace of mind and operational security.

Key Application Scenarios

The versatility of the Siemens 5SV4444-6 makes it suitable for a broad spectrum of industrial and commercial applications. It is particularly well-suited for protecting power circuits in manufacturing plants, workshops, and process industries where machinery operates continuously and requires robust safety measures. In commercial buildings, such as hospitals, data centers, and laboratories, where uninterrupted power supply and stringent safety regulations are paramount, this RCD ensures reliable protection for sensitive equipment and critical infrastructure. Its application extends to distribution boards for large electrical installations, providing effective earth fault protection for three-phase loads like motors, pumps, and HVAC systems. Furthermore, it is an excellent choice for installations in areas with higher risks of insulation degradation or potential for fault currents, offering an additional layer of safety against electrical fires.

Practical System Integration Guidance

Integrating the Siemens 5SV4444-6 into existing electrical systems is a straightforward process, primarily due to its standard DIN rail mounting and familiar terminal configurations. Installation requires careful adherence to local electrical codes and standards. The device is designed for line-to-load connections, with the incoming power supply connected to the upper terminals and the outgoing protected circuits to the lower terminals. For 4-pole operation, all three phases and the neutral conductor must be connected. It is crucial to ensure that the neutral conductor is properly routed through the RCD to enable correct fault detection. Wire sizing should be in accordance with the rated current of 40A and the connected load. Proper earthing of the installation is fundamental for the RCD to function effectively. When commissioning, a functional test using a dedicated RCD test button or an external tester should be performed to verify correct tripping at rated residual current and within specified times.

Operation and Risk Mitigation

The primary function of the Siemens 5SV4444-6 is to detect residual currents—imbalances between the live and neutral conductors—that indicate a potential leakage path to earth. When such a leakage current exceeds the 100mA threshold, the RCD rapidly trips, disconnecting the power supply and preventing electric shock to individuals who may come into contact with a faulty appliance or conductor. This significantly mitigates the risk of indirect contact. Additionally, the RCD helps prevent fires by detecting insulation faults that could otherwise lead to overheating and ignition. To ensure ongoing operational safety, regular testing of the RCD is recommended, typically every six months, using the integrated test button or an external RCD tester. Familiarity with the device's tripping behavior is essential for troubleshooting; nuisance tripping can sometimes occur due to transient overvoltages or specific load characteristics, and identifying the cause is key to uninterrupted operation.

Scalability & Long-Term Value

The Siemens 5SV4444-6 offers excellent scalability and long-term value within electrical distribution systems. Its modular design allows for easy replacement or addition of RCDs as system requirements evolve. Compatibility with Siemens' broader range of circuit breakers, surge protection devices, and other switchgear components ensures seamless integration into existing or new panel boards, supporting the creation of comprehensive and layered protection schemes. For facilities looking to embrace digital transformation and the Industrial Internet of Things (IIoT), this RCD can be part of a smart electrical infrastructure. While the 5SV4444-6 itself is a fundamental protective device, its integration into intelligent monitoring systems, perhaps via associated communication modules or smart meters, can provide valuable data on system health and energy consumption, contributing to predictive maintenance strategies and operational efficiency over the long lifespan expected from Siemens products.

Frequently Asked Questions (FAQs)

What is the sensitivity of the Siemens 5SV4444-6?

The Siemens 5SV4444-6 has a rated residual current of 100mA. This sensitivity is designed to protect against fire hazards. It also offers protection against indirect contact in specific applications.

What type of protection does the 5SV4444-6 offer?

This RCD provides protection against earth faults. It safeguards against indirect contact by quickly disconnecting power. It also helps prevent fires caused by electrical leakage.

How many poles does the Siemens 5SV4444-6 have?

The Siemens 5SV4444-6 is a 4-pole device. This makes it suitable for three-phase power systems. It protects all three phases and the neutral conductor.

What is the rated current for this switch?

The rated current for the Siemens 5SV4444-6 is 40A. This indicates the maximum continuous current it can handle. It is important to match this to the protected circuit's load.

Can this RCD be used for residential applications?

While primarily designed for industrial use, it can be employed in certain demanding residential settings. Its 100mA rating is often for fire protection. Check local regulations for suitability.

What is the breaking capacity of the 5SV4444-6?

The breaking capacity is 6kA. This means it can safely interrupt fault currents up to 6000 Amperes. This ensures protection against severe electrical faults.

Is the Siemens 5SV4444-6 easy to install?

Yes, it is designed for DIN rail mounting. Standard terminal connections simplify wiring. Ensure compliance with all electrical safety codes during installation.

What voltage is this RCD rated for?

The rated voltage for the Siemens 5SV4444-6 is 400V AC. This is standard for three-phase industrial power distribution. Always verify system voltage before installation.

How do I test the functionality of this RCD?

It features a built-in test button for periodic checks. An external RCD tester can also be used. Regular testing ensures reliable operation and safety.

What does "leakage protection switch" mean in this context?

It refers to a Residual Current Device (RCD). It detects current imbalances and trips to prevent shock and fire. It is a critical safety component.