Siemens 5SU9346-1CN06 RCBO Earth Leakage Protection 6A 30mA 4P C
The Siemens 5SU9346-1CN06 RCBO offers robust earth leakage protection for 4-pole systems, featuring a 6A current rating and 30mA sensitivity. This device combines overcurrent and earth fault protection, enhancing electrical safety and operational reliability in demanding industrial environments. Its C-curve tripping characteristic ensures it can handle inrush currents commonly found in inductive loads, making it a versatile solution for motor control circuits and power distribution panels.
Siemens 5SU9346-1CN06 RCBO: Product Specifications
| Feature | Specification |
| :-------------------------- | :----------------------------- |
| Product Type | Residual Current Operated Circuit Breaker with Overcurrent Protection (RCBO) |
| Model Number | 5SU9346-1CN06 |
| Number of Poles | 4 |
| Rated Current (In) | 6A |
| Rated Residual Operating Current (IΔn) | 30mA |
| Tripping Characteristic | C |
| Rated Voltage (Ue) | 400V AC |
| Rated Breaking Capacity (Icn) | 6kA |
| Frequency | 50/60 Hz |
| Terminal Type | Screw Terminals |
| Mounting Type | DIN Rail |
| Protection Class | IP20 (enclosure), IP40 (front) |
| Ambient Temperature Range | -25°C to +45°C |
| Standards Compliance | IEC/EN 61009-1 |
Core Features & Market Positioning
The Siemens 5SU9346-1CN06 stands out due to its comprehensive protection capabilities, integrating both overcurrent and earth leakage detection into a single, compact unit. This dual functionality simplifies electrical panel design and installation, reducing component count and saving valuable space. Its 30mA sensitivity is critical for protecting personnel from dangerous electric shocks in line with stringent safety regulations. The C-curve tripping characteristic offers superior nuisance trip immunity for circuits with moderate inrush currents, such as those found in control systems and lighting circuits, positioning it as a reliable choice for diverse industrial applications. Siemens' reputation for quality and durability further solidifies its market position as a trusted provider of electrical protection devices.
Key Application Scenarios
This RCBO is ideally suited for protecting final circuits in industrial and commercial installations where both overcurrent and earth fault protection are mandated. It is frequently specified for use in control cabinets, machine tools, and power distribution boards for manufacturing equipment. The 6A rating and 30mA sensitivity make it particularly effective for protecting circuits powering sensitive electronic equipment or those with a higher risk of earth faults, such as in environments with increased moisture or dust. Its 4-pole configuration is essential for applications requiring protection of all three phases and the neutral conductor, common in three-phase motor circuits and systems with balanced loads.
Practical System Integration Guidance
Installing the Siemens 5SU9346-1CN06 RCBO is straightforward, requiring secure mounting on a standard 35mm DIN rail. Ensure proper isolation of power before commencing any wiring. For a 4-pole unit, connect the incoming live conductors (L1, L2, L3) and the neutral conductor (N) to the respective top terminals, observing correct phase sequence if applicable. The outgoing load conductors should be connected to the corresponding bottom terminals. The earth leakage protection requires the neutral conductor to pass through the RCBO's neutral terminal. It's crucial to ensure all connections are tightened appropriately to prevent overheating and maintain reliable electrical contact. Always consult the manufacturer's detailed wiring diagram for specific installation requirements and ensure compliance with local electrical codes.
Operation and Risk Mitigation
The 5SU9346-1CN06 operates by continuously monitoring the balance of current between the live and neutral conductors. If an imbalance occurs, indicating current is leaking to earth, the RCBO trips, disconnecting the circuit and preventing electric shock. The overcurrent function protects against short circuits and overloads, indicated by the C-curve tripping response. In case of a fault, a visual indicator on the device will typically show the trip status. To reset the RCBO after a fault, ensure the fault condition has been cleared, then simply move the toggle switch to the "ON" position. Regular testing of the earth leakage function using the integrated test button (if applicable) is recommended to ensure its continued operational integrity and adherence to safety standards.
Scalability & Long-Term Value
The Siemens 5SU9346-1CN06 RCBO integrates seamlessly into existing Siemens industrial control and automation platforms, offering excellent compatibility with other Siemens circuit protection devices and switchgear. This compatibility facilitates easy upgrades and expansions of electrical systems. For facilities embracing Industry 4.0 principles, while this specific device may not have direct IIoT connectivity, its reliable foundational protection enhances the overall stability of systems that can be monitored digitally. Its robust construction and adherence to international standards ensure a long service life, minimizing downtime and contributing to the long-term operational value and safety of electrical infrastructure.
Frequently Asked Questions
1. What is the primary function of the Siemens 5SU9346-1CN06 RCBO?
This device offers dual protection against electrical hazards. It safeguards circuits from dangerous earth leakages. It also provides overcurrent protection against short circuits and overloads.
2. Can this RCBO be used for single-phase applications?
No, the 5SU9346-1CN06 is a 4-pole device. It is designed for three-phase applications plus neutral. For single-phase, a 2-pole RCBO is typically required.
3. What does the 'C' in the tripping characteristic 'C' mean?
The 'C' indicates a C-curve tripping characteristic. This means it's designed for circuits with moderate inrush currents. It offers better immunity to nuisance tripping from inductive loads.
4. How sensitive is the earth leakage protection of this unit?
The unit features a rated residual operating current (IΔn) of 30mA. This sensitivity is crucial for protecting personnel against electric shock. It complies with safety standards for direct contact protection.
5. What is the maximum breaking capacity of the Siemens 5SU9346-1CN06?
The rated breaking capacity (Icn) is 6kA. This means it can safely interrupt fault currents up to 6000 Amperes. This level of protection is suitable for many industrial distribution circuits.
6. What is the correct way to wire a 4-pole RCBO like the 5SU9346-1CN06?
Connect incoming live conductors (L1, L2, L3) and neutral (N) to the top terminals. Ensure correct phase rotation if applicable. Outgoing load conductors connect to the bottom terminals.
7. What are the environmental conditions suitable for this RCBO?
The device operates within an ambient temperature range of -25°C to +45°C. It has an IP20 enclosure rating and IP40 front protection. Avoid excessively dusty or wet environments without additional enclosure.
8. How do I reset the RCBO after it trips due to an earth fault?
First, identify and rectify the cause of the earth fault. Then, simply move the toggle switch to the 'ON' position. Ensure the fault is no longer present before attempting to reset.
9. Does this RCBO comply with international safety standards?
Yes, the Siemens 5SU9346-1CN06 RCBO complies with IEC/EN 61009-1 standards. This ensures it meets rigorous safety and performance requirements for electrical devices.
10. What is the significance of the 6A rated current for this RCBO?
The 6A rating signifies the maximum continuous current the device can safely handle without tripping due to overload. It's suitable for circuits with lower power consumption or smaller loads.
