Siemens 5SU9156-7VK10 RCCB Earth Leakage Switch 10A 10mA 1P+N C
The Siemens 5SU9156-7VK10 RCCB is a crucial component for safeguarding electrical installations against earth leakage faults. This residual current-operated circuit breaker (RCCB) offers robust protection with a 10A rated current, a sensitive 10mA tripping current, and a 1-pole + neutral configuration, ensuring reliable safety for personnel and equipment. Its Type C tripping characteristic provides effective protection against overcurrents and short circuits, making it a versatile solution for various industrial and commercial applications.
Product Specifications
| Feature | Specification |
| :---------------------- | :--------------------------------------------- |
| Product Type | Residual Current-Operated Circuit Breaker (RCCB) |
| Siemens Model Number | 5SU9156-7VK10 |
| Rated Current (In) | 10A |
| Rated Residual Current | 10mA |
| Number of Poles | 1P+N (1 Pole + Neutral) |
| Tripping Characteristic | Type C |
| Rated Voltage (Un) | 230V |
| Frequency | 50/60 Hz |
| Protection Type | Earth Leakage Protection |
| Compliance Standards | IEC/EN 61009-1, IEC/EN 61008-1 |
| Mounting Type | DIN Rail |
Core Features & Market Positioning
The Siemens 5SU9156-7VK10 RCCB stands out due to its high-performance design, engineered for superior reliability and safety. Its precise 10mA tripping sensitivity is ideal for applications requiring enhanced protection against electric shock, offering a critical safety layer in environments where direct contact with live conductors is a risk. The Type C tripping curve ensures that the device can handle inrush currents typical of inductive loads without nuisance tripping, while still providing rapid disconnection under fault conditions. This combination of sensitive earth leakage detection and appropriate overcurrent response positions the Siemens 5SU9156-7VK10 as a leading choice for demanding electrical protection requirements, offering peace of mind and compliance with stringent safety regulations.
Key Application Scenarios
This RCCB is exceptionally well-suited for protecting circuits in residential, commercial, and industrial settings where enhanced safety against indirect contact is paramount. Its 10A rating and 10mA sensitivity make it ideal for circuits supplying sensitive electronic equipment, lighting circuits, and power outlets in areas prone to moisture, such as kitchens, bathrooms, and outdoor installations. For industrial applications, the Siemens 5SU9156-7VK10 can be deployed to protect specific machinery or distribution boards where the risk of earth faults necessitates rapid and reliable disconnection. Furthermore, its 1P+N configuration simplifies wiring for single-phase circuits, reducing installation complexity and space requirements in distribution panels.
Practical System Integration Guidance
Integrating the Siemens 5SU9156-7VK10 into an electrical system is straightforward due to its standard DIN rail mounting. Ensure the upstream circuit breaker or fuse provides adequate overcurrent protection for the 10A rated current of the RCCB. For proper installation, connect the line conductor of the protected circuit to the designated L terminal and the neutral conductor to the N terminal on the RCCB. The neutral conductor must also be continuous and not switched by the RCCB itself. The load conductors are then connected to the corresponding output terminals. It is critical to verify the correct polarity and secure all connections to prevent overheating and ensure reliable operation. Always consult the manufacturer's installation manual for detailed wiring diagrams and safety precautions specific to your application.
Operation and Risk Mitigation
The primary function of the Siemens 5SU9156-7VK10 is to detect residual currents flowing to earth and to rapidly interrupt the circuit, thereby preventing electric shock and mitigating fire hazards caused by earth faults. In normal operation, the current flowing through the live conductor and the neutral conductor should be equal. If an imbalance occurs, indicating a fault current path to earth, the RCCB detects this difference and trips. To mitigate risks, regular testing of the RCCB's functionality using its integrated test button is essential. This test should be performed periodically, as recommended by local electrical codes and standards. In the event of a trip, identify and rectify the cause of the earth leakage before resetting the RCCB.
Scalability & Long-Term Value
The Siemens 5SU9156-7VK10 RCCB is designed for compatibility within Siemens' comprehensive range of electrical distribution and protection devices. While RCCBs themselves are primarily point-of-protection devices, their integration into larger Siemens systems, such as ALPHA or SENTRON switchgear, ensures seamless compatibility and a unified approach to electrical safety. For systems requiring monitoring or remote signaling of fault status, integration with intelligent residual current monitoring devices (RCMs) or communication-enabled circuit breakers can be considered. This allows for advanced diagnostics and predictive maintenance, contributing to the long-term operational efficiency and reliability of the entire electrical infrastructure.
FAQs
What is the primary function of the Siemens 5SU9156-7VK10 RCCB?
This device protects against earth leakage faults, preventing electric shock hazards.
It ensures personnel safety by rapidly disconnecting power when unbalanced currents occur.
Its main role is to safeguard both individuals and electrical equipment from electrical hazards.
Can the Siemens 5SU9156-7VK10 be used for overload protection?
No, its primary function is earth leakage protection.
Overload and short-circuit protection are handled by an upstream circuit breaker or fuse.
The Type C characteristic offers some overcurrent immunity but not primary overload protection.
What does the 10mA tripping current signify for this RCCB?
It indicates a high sensitivity to earth leakage currents.
This low value provides enhanced protection against electric shock for persons.
It is suitable for sensitive applications where even small leakage can be hazardous.
Is the Siemens 5SU9156-7VK10 suitable for single-phase or three-phase circuits?
This specific model, 5SU9156-7VK10, is designed for 1-pole + neutral circuits.
It is intended for single-phase power supply applications.
For three-phase systems, a different RCCB configuration (e.g., 4-pole) would be required.
How often should the test button on the 5SU9156-7VK10 be used?
Regular testing is crucial for verifying its functionality.
It is recommended to test monthly or as per local electrical regulations.
Using the test button ensures the tripping mechanism remains operational.
What is the significance of the Type C tripping characteristic?
Type C offers delayed tripping for inductive loads with high inrush currents.
It prevents nuisance tripping from temporary current surges.
However, it still provides rapid disconnection for earth faults.
What type of loads can be protected by a 10A, 10mA RCCB?
It is suitable for lighting and general-purpose circuits.
It can protect sensitive electronic equipment and appliances.
Ideal for circuits in kitchens, bathrooms, and damp environments.
Where is the best place to install this Siemens RCCB?
Install it in main distribution boards or sub-distribution panels.
It should be placed upstream of the circuits requiring earth leakage protection.
Ensure accessibility for testing and resetting after a fault.
Can I combine this RCCB with other circuit breakers on the same circuit?
No, an RCCB is a standalone protective device for earth leakage.
It should not be installed in series with other protective devices for the same function.
Ensure the upstream protection is rated appropriately for the RCCB's 10A rating.
What are the main benefits of using a Siemens RCCB like the 5SU9156-7VK10?
It significantly enhances electrical safety by protecting against shocks.
It helps prevent fires caused by earth leakage currents.
It ensures compliance with electrical safety standards and regulations.
