Siemens 5SV3311-6KK12 RCBO Earth Leakage Protection Unit 2P 16A 30mA

The Siemens 5SV3311-6KK12 is a 2-pole Residual Current Circuit Breaker with Overcurrent protection (RCBO) designed for reliable electrical protection. This unit combines residual current detection with overcurrent protection, offering comprehensive safety for personnel and equipment. It features a rated current of 16A and a rated residual current of 30mA, making it suitable for applications requiring high sensitivity to earth leakage faults. The RCBO operates on a 230V AC supply and is built to the standards of the SENTRON series, ensuring quality and compatibility within Siemens' electrical infrastructure solutions. Its type A classification indicates its capability to detect both sinusoidal AC and pulsating DC residual currents.

Product Specifications

| Specification                         | Value                                                      |

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

| Product Number                        | 5SV3311-6KK12                                              |

| Product Family                        | RCCB / RCBO                                                |

| Number of Poles                       | 2                                                          |

| Rated Current (In)                    | 16 A                                                       |

| Rated Residual Current (IΔn)          | 30 mA                                                      |

| Rated Voltage (Un)                    | 230 V AC                                                   |

| Leakage Current Type                  | A                                                          |

| Short-Circuit Breaking Capacity (Icw) | 10 kA                                                      |

| Protection Class (IP)                 | IP20 (with connected conductors)                           |

| Frequency                             | 50 Hz                                                      |

| Dimensions (W x H x D)                | 36 x 90 x 70 mm                                            |

| Construction Size (DIN 43880)         | 1                                                          |

| Mechanical Service Life               | 10,000 operating cycles                                    |

| Material Feature                      | Silicon-free                                               |

| Connectable Conductor Cross-section   | Solid and Stranded: 0.75 mm² to 35 mm²                     |

| Tightening Torque                     | 2.5 - 3 N·m                                                |

| Operating Temperature Range           | -25 °C to 70 °C                                            |

| Compliance                            | RoHS, REACH                                                |

| Country of Origin                     | Germany                                                    |

Core Features & Market Positioning

The Siemens 5SV3311-6KK12 RCBO stands out in the market due to its robust design and integrated protective functions. As part of Siemens' established SENTRON series, it benefits from a reputation for quality, reliability, and advanced electrical protection. The device's primary advantage lies in its dual-action protection: it simultaneously guards against dangerous touch voltages caused by earth faults and protects against overcurrents (overloads and short circuits). This integration simplifies electrical installations by reducing the number of required devices, saving space in distribution boards, and minimizing wiring complexity. Its Type A classification is a key differentiator, enabling it to detect not only AC but also pulsating DC residual currents, which are increasingly common with modern electronic equipment. Furthermore, the availability of specific product variations like the SIGRES (for harsh ambient conditions) expands its applicability beyond standard installations.

Key Application Scenarios

The Siemens 5SV3311-6KK12 RCBO is ideally suited for a wide array of applications where comprehensive electrical safety is paramount. It is commonly employed in residential buildings, commercial establishments, and industrial facilities to protect final circuits. Specific use cases include protecting circuits for lighting, socket outlets, and appliances, especially those containing electronic components like personal computers, televisions, and modern washing machines with frequency converters. The 30mA tripping current makes it a critical component for direct contact protection, preventing severe electric shocks. Its robust construction and the availability of SIGRES variants also position it for use in demanding environments, such as agricultural settings, construction sites, or areas with potential exposure to corrosive agents, where enhanced durability and reliability are essential.

Practical System Integration Guidance

Integrating the Siemens 5SV3311-6KK12 RCBO into an electrical system is a straightforward process, typical for modular DIN rail-mounted devices. The unit features clearly marked terminals for secure connection of both solid and stranded conductors, with a recommended tightening torque of 2.5 to 3 N·m for the screw-type terminals. The connectable conductor cross-section ranges from 0.75 mm² to 35 mm², accommodating a variety of wiring gauges. Power supply can be connected to either the top or bottom terminals, offering flexibility in installation layout. The device occupies two modular widths on a standard DIN rail. While specific wiring diagrams are beyond the scope of this article, it's crucial to follow local electrical codes and best practices, ensuring correct polarity and secure connections to prevent operational issues or safety hazards. Compatibility with other Siemens SENTRON components, such as busbars and auxiliary switches, further simplifies integration and expands system functionality.

Operation and Risk Mitigation

Operating the Siemens 5SV3311-6KK12 RCBO involves regular testing to ensure its continued functionality, a critical aspect of risk mitigation. A test button is integrated into the device for periodic manual testing of the residual current tripping function. The recommended testing interval can be extended to once a year for SIGRES versions under specific ambient conditions. In the event of a fault, the RCBO will trip, disconnecting all live parts and simplifying troubleshooting. If the device trips, it indicates a residual current fault, an overload, or a short circuit. Troubleshooting typically involves identifying the cause of the trip (e.g., faulty appliance, wiring issue) and rectifying it before resetting the RCBO. Users should be aware that the device protects against earth leakage and overcurrents but not directly against overvoltage from lightning strikes, which may require additional surge protection devices. Proper installation by qualified personnel is essential to mitigate installation errors and ensure safe operation.

Scalability & Long-Term Value

The Siemens 5SV3311-6KK12 RCBO offers significant long-term value through its integration within the broader Siemens SENTRON ecosystem and its inherent design for reliable performance. Its compatibility with a range of Siemens accessories, such as auxiliary switches and fault signal contacts, allows for system expansion and enhanced monitoring capabilities. This modularity ensures that electrical installations can be adapted and upgraded over time to meet evolving safety standards and operational requirements. For instance, combining the RCBO with arc fault detection devices can provide an even higher level of protection against fire hazards. The device's durable construction and the quality associated with Siemens products contribute to a long service life, minimizing the need for premature replacements and ensuring sustained operational safety and compliance.

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FAQs

Q1: What is the primary function of the Siemens 5SV3311-6KK12 RCBO?

The Siemens 5SV3311-6KK12 RCBO provides dual protection. It detects earth leakage currents and overcurrents.

This integrated design safeguards against electric shock and fire hazards. It also protects electrical circuits from overloads and short circuits.

This unit ensures both personal safety and equipment integrity in electrical installations. It is a crucial safety device for modern electrical systems.

Q2: What does the 'Type A' classification mean for this RCBO?

Type A indicates the RCBO can detect AC and pulsating DC residual currents. This is important for modern electronics.

Many electronic devices generate pulsating DC fault currents. Standard Type AC devices would not detect these.

Type A classification ensures enhanced protection against a wider range of fault current types. This makes it suitable for circuits with modern appliances.

Q3: What is the rated current and sensitivity of the Siemens 5SV3311-6KK12?

This RCBO has a rated current of 16A. This defines the maximum continuous current it can handle.

Its rated residual current is 30mA. This is the sensitivity for detecting earth leakage.

A 30mA rating is standard for personal protection against direct contact. It ensures rapid disconnection in case of leakage.

Q4: Where is the Siemens 5SV3311-6KK12 RCBO typically installed?

This RCBO is designed for DIN rail mounting in distribution boards. It is common in residential and commercial settings.

It provides protection for individual circuits within an electrical installation. This could include lighting or socket outlets.

The compact 2-pole design saves space, making it ideal for modern panelboards. It is suitable for systems operating at 230V AC.

Q5: What is the significance of the 'SIGRES' designation if available for this product?

SIGRES variants are designed for harsh ambient conditions. They offer enhanced protection against moisture and corrosive elements.

These units are suitable for environments like swimming pools or agricultural facilities. They ensure reliable operation where standard devices might fail.

SIGRES versions also allow for an extended test interval for the RCD function. This reduces maintenance requirements in challenging locations.

Q6: How does this RCBO protect against overcurrents?

It includes an integral overcurrent protection function. This covers both overload and short-circuit conditions.

The device contains a thermal release for overload protection. It also has an electromagnetic release for instantaneous short-circuit response.

This dual overcurrent protection ensures that the circuit is safely interrupted if the current exceeds safe limits, preventing damage to wiring and equipment.

Q7: Can I install this RCBO myself, or do I need a professional electrician?

Installation should only be performed by a qualified electrician. Incorrect wiring can be dangerous and compromise safety.

Electricians ensure compliance with all relevant electrical codes and standards. They also possess the knowledge to correctly terminate wiring and test the device.

For safety reasons and to ensure proper functioning, professional installation is strongly recommended for all circuit protection devices.

Q8: What is the expected lifespan or mechanical service life of this Siemens RCBO?

The Siemens 5SV3311-6KK12 RCBO has a typical mechanical service life of 10,000 operating cycles. This refers to the number of times the device can be switched on or off mechanically.

The electrical endurance (breaking capacity) will depend on the number and severity of fault currents interrupted. However, for typical residential or commercial use, it is designed for long-term reliability.

Regular testing and proper installation contribute to its overall lifespan and performance. Siemens products are known for their durability and quality.

Q9: What accessories are compatible with the Siemens 5SV3311-6KK12?

This RCBO is compatible with various Siemens accessories. These can include auxiliary switches and fault signal contacts.

These accessories allow for remote monitoring and signaling of the device's status. They enhance system integration and automation capabilities.

For instance, auxiliary switches can be used to indicate if the RCBO has tripped, which is useful in larger or remote installations.

Q10: Does this RCBO offer protection against voltage surges or lightning strikes?

No, the Siemens 5SV3311-6KK12 RCBO primarily protects against earth leakage and overcurrents. It does not provide direct protection against high-voltage surges from lightning strikes.

For protection against transient overvoltages and lightning, you would need to install separate surge protective devices (SPDs). These are typically installed upstream of the RCBO or MCB.

A comprehensive protection strategy often involves combining RCBOs with SPDs to cover all relevant electrical protection needs.