Siemens 5SV3322-4 Earth Leakage Protection RCBO 2P 25A 30mA

The Siemens 5SV3322-4 RCBO is a critical component for robust electrical safety, offering combined overcurrent and earth leakage protection in a compact 2-pole design. This unit is engineered with a 25A rated current and a highly sensitive 30mA earth leakage sensitivity, ensuring rapid detection and interruption of fault currents to prevent electric shock and fire hazards. Its advanced tripping mechanism and high breaking capacity provide reliable performance in demanding industrial and commercial environments.

| Parameter             | Specification                       |

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

| Product Type          | Earth Leakage Protection RCBO       |

| Poles                 | 2P                                  |

| Rated Current (In)    | 25A                                 |

| Earth Leakage Current | 30mA                                |

| Rated Voltage (Ue)    | 230/400V AC                         |

| Breaking Capacity (Icn)| 6 kA                                |

| Frequency             | 50/60 Hz                            |

| Tripping Type         | Thermal-magnetic                    |

| Protection Class      | IP20                                |

| Terminal Type         | Screw terminals                     |

| Mounting Type         | DIN rail (35mm)                     |

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

Core Features & Market Positioning

The Siemens 5SV3322-4 distinguishes itself through its dual-functionality, integrating Miniature Circuit Breaker (MCB) and Residual Current Device (RCD) capabilities into a single, space-saving device. This integration simplifies panel building and reduces installation time and complexity, a significant advantage in competitive electrical infrastructure projects. Siemens' reputation for quality and reliability underpins its market positioning as a premium solution for critical safety applications, offering enhanced protection against indirect contact and fire risks compared to conventional fuse-disconnector units. Its high breaking capacity of 6 kA ensures safe interruption even during severe short-circuit events.

Key Application Scenarios

This RCBO is ideally suited for protecting circuits in residential, commercial, and industrial settings where enhanced safety is paramount. Common applications include the protection of lighting circuits, socket outlets, and dedicated appliance circuits for machinery and equipment. It is particularly crucial in areas with higher risks of electric shock, such as bathrooms, kitchens, and outdoor installations. The 30mA sensitivity is the standard for personal protection against electric shock, making the 5SV3322-4 essential for compliance with safety regulations in diverse environments, including workshops, data centers, and public buildings.

Practical System Integration Guidance

Installation of the Siemens 5SV3322-4 RCBO follows standard DIN rail mounting procedures, occupying two modules on a standard 35mm rail. Wiring requires connecting the line and neutral conductors to the appropriate input terminals, ensuring correct polarity. The output terminals then feed the protected circuit. For multi-phase systems, appropriate sizing and application of RCBOs for individual circuits are critical. It is vital to ensure the upstream protective device (e.g., main circuit breaker) is adequately rated to coordinate with the RCBO's breaking capacity. Earthing continuity must be maintained to the final circuit's protective conductor.

Operation and Risk Mitigation

The RCBO operates by continuously monitoring the balance of current flowing in the live and neutral conductors. If an imbalance exceeding 30mA occurs, indicative of current leakage to earth, the internal tripping mechanism rapidly de-energizes the circuit. The thermal element provides overcurrent protection against overload, while the magnetic element guards against short circuits. Should the device trip, a visual indicator on the front panel will typically show the trip status. Resetting requires manually flipping the lever back to the 'ON' position after the fault condition has been identified and rectified. Common troubleshooting involves checking for insulation faults in the connected equipment or wiring.

Scalability & Long-Term Value

The Siemens 5SV3322-4 integrates seamlessly into Siemens' broader range of electrical distribution and protection devices, allowing for scalable system design. Its compatibility with standard busbar systems and terminal blocks facilitates expansion and upgrades within existing switchboard configurations. As electrical systems evolve towards increased digitalization, devices like the 5SV3322-4 form the foundational layer of safety, ensuring reliable operation that is prerequisite for any advanced monitoring or IIoT integration strategies. The robust construction and adherence to international standards ensure long-term operational value and reduced maintenance requirements.

FAQs

What is the primary function of the Siemens 5SV3322-4 RCBO?

This device offers combined protection against overcurrents and earth leakage faults. It ensures safety by rapidly disconnecting power when an electrical fault is detected. This dual protection minimizes risks of electric shock and fire hazards.

How does the 30mA sensitivity benefit users?

A 30mA tripping current is crucial for personal protection against electric shock. It activates quickly to interrupt dangerous fault currents before severe harm can occur. This level of sensitivity meets stringent safety standards for many applications.

Can the Siemens 5SV3322-4 be used for single-phase and three-phase systems?

The 5SV3322-4 is a 2-pole device, primarily designed for single-phase circuits. For three-phase systems, multiple single-phase RCBOs or specific three-phase RCBO units would be required. Always consult system requirements for correct device selection.