Siemens 5SU9326-1CN06 Earth Leakage Protection for Small Equipment 6A 30mA 2P C

The Siemens 5SU9326-1CN06 is a crucial component for safeguarding small equipment against earth leakage faults. This 2-pole, 6A residual current device (RCD) with a 30mA tripping current offers essential protection, preventing electrical shocks and fires. Its compact design and C-curve tripping characteristic make it ideal for a wide range of applications where reliable safety is paramount. The Siemens 5SU9326-1CN06 ensures operational continuity and personnel safety through its advanced earth leakage detection capabilities.

Product Specifications

| Feature                       | Specification                                      |

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

| Manufacturer                  | Siemens                                            |

| Product Series                | 5SU9                                               |

| Product Type                  | Earth Leakage Protection Device (Residual Current Device) |

| Rated Current (In)            | 6 A                                                |

| Rated Residual Operating Current (IΔn) | 30 mA                                              |

| Number of Poles               | 2                                                  |

| Tripping Curve                | C-Curve                                            |

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

| Frequency                     | 50/60 Hz                                           |

| Breaking Capacity (Icn)       | 6 kA                                               |

| Mounting Type                 | DIN Rail                                           |

| Protection Degree             | IP20                                               |

| Ambient Temperature (Operating) | -25 °C to +45 °C                                   |

| Dimensions (H x W x D)        | 88 mm x 35 mm x 70 mm                              |

Core Features & Market Positioning

The Siemens 5SU9326-1CN06 distinguishes itself through its robust construction and adherence to stringent international safety standards, positioning it as a reliable choice for sensitive electrical installations. Its C-curve tripping characteristic is specifically designed to handle moderate inrush currents associated with inductive loads common in small equipment, thereby minimizing nuisance tripping while ensuring rapid detection of dangerous earth faults. This balance between sensitivity and immunity to transient currents is a key differentiator in a market segment demanding both safety and operational stability. The device's compact 2-pole design facilitates space-saving installations in distribution boards and enclosures.

Key Application Scenarios

This Siemens 5SU9326-1CN06 RCD is an indispensable protective device for safeguarding a variety of small electrical equipment and circuits. It is commonly applied in residential settings to protect outlets and lighting circuits, especially in areas with a higher risk of electric shock such as kitchens and bathrooms. In commercial and light industrial environments, it provides critical protection for control panels, small machinery, and sensitive electronic equipment where even minor leakage currents can cause damage or hazards. The 30mA sensitivity is the standard for personal protection, making it suitable for circuits supplying power to appliances, tools, and other devices operated by personnel.

Practical System Integration Guidance

Integrating the Siemens 5SU9326-1CN06 into existing or new electrical systems is straightforward due to its standard DIN rail mounting and clear terminal markings. Installation requires connecting the line and neutral conductors to the designated input terminals and then connecting the output terminals to the protected circuit's load. It is imperative to ensure that the neutral conductor is routed through the device correctly for proper functioning. Correct wiring prevents incorrect tripping and ensures the RCD effectively monitors for earth leakage. Proper grounding of the protected equipment is also essential for the RCD to perform its safety function.

Operation and Risk Mitigation

The primary function of the Siemens 5SU9326-1CN06 is to detect imbalances in current flow between the line and neutral conductors, indicative of an earth leakage fault. When such a fault occurs, the device rapidly interrupts the circuit, typically within milliseconds, thus preventing electric shock hazards to personnel and mitigating the risk of fire caused by electrical faults. Regular testing of the RCD using its integrated test button is crucial to ensure its continued operational readiness. This simple test verifies the internal tripping mechanism and contact operation. In the event of persistent tripping, a thorough inspection of the protected circuit and equipment for insulation faults or other anomalies is recommended.

Scalability & Long-Term Value

While the Siemens 5SU9326-1CN06 is designed for specific circuit protection, its value extends through its compatibility with Siemens' broader range of modular circuit protection devices. This allows for standardized electrical panel construction and potential future upgrades or expansions of protection schemes. As part of a comprehensive electrical safety system, it contributes to the overall reliability and longevity of connected equipment by preventing damage from electrical faults. Its durable design and Siemens' reputation for quality ensure a long operational lifespan, making it a cost-effective solution for essential safety requirements.

Frequently Asked Questions

What is the primary function of the Siemens 5SU9326-1CN06?

This device is an earth leakage protection device, also known as a Residual Current Device (RCD). Its main role is to detect imbalances in electrical current flow.

These imbalances indicate that current is leaking to earth, which can cause electric shock or fire hazards. Upon detecting such a leakage, the RCD rapidly disconnects the power supply to the protected circuit.

This function is vital for ensuring the safety of people and property in residential, commercial, and light industrial applications.

How does the C-curve tripping characteristic benefit small equipment protection?

The C-curve tripping characteristic means the device is designed to handle moderate inrush currents. These are common when inductive loads, like motors in small equipment, start up.

This characteristic helps to prevent nuisance tripping, where the RCD trips unnecessarily during normal equipment startup. However, it still trips quickly for dangerous earth fault currents.

This provides a good balance between robust protection against faults and reliable operation of connected small equipment.

Can the Siemens 5SU9326-1CN06 be used for personal protection against electric shock?

Yes, with a rated residual operating current of 30mA, this RCD is specifically designed for personal protection. This sensitivity is the standard for preventing serious injury from electric shock.

When a person accidentally touches a live part or a faulty appliance, current can flow through their body to the earth. The 30mA RCD will detect this leakage and trip very quickly.

It is a critical safety measure for circuits in areas where water is present or where there is a higher risk of contact with electrical hazards.

What is the rated current and residual operating current of this Siemens RCD?

The rated current (In) for the Siemens 5SU9326-1CN06 is 6 Amperes (A). This indicates the maximum continuous current the device can safely handle under normal operating conditions.

The rated residual operating current (IΔn) is 30 milliamperes (mA). This is the earth leakage current at which the RCD is designed to trip and disconnect the circuit.

These two values are fundamental for selecting the correct RCD for a specific circuit's load and protection requirements.

Is the Siemens 5SU9326-1CN06 easy to install on a standard electrical panel?

Yes, the Siemens 5SU9326-1CN06 is designed for easy installation in standard electrical distribution boards. It features a compact, modular design that mounts directly onto a 35mm DIN rail.

The terminal connections are clearly marked for line and neutral input and output, simplifying the wiring process for electricians. Proper connection of both line and neutral conductors is essential for its correct operation.

Its 2-pole configuration also means it takes up minimal space in the panel, which is beneficial for crowded enclosures.

What type of circuits is the Siemens 5SU9326-1CN06 best suited for?

This RCD is ideally suited for protecting circuits in residential and light commercial applications that supply power to small appliances and equipment. Examples include lighting circuits, socket outlets, and circuits for small motors.

Its 6A rating makes it appropriate for circuits with lower current demands. The 30mA tripping sensitivity provides essential personal protection against electric shock across these diverse applications.

It is particularly recommended for areas where water ingress or higher risk of contact with electrical devices is possible, such as kitchens and bathrooms.

How often should the test button on the Siemens 5SU9326-1CN06 be operated?

The test button on the Siemens 5SU9326-1CN06 should be operated regularly to verify the proper functioning of the RCD. A common recommendation is to test it once a month.

Operating the test button simulates an earth fault condition, causing the RCD to trip and disconnect the power. This ensures the internal mechanism, contacts, and tripping coil are working correctly.

If the RCD does not trip when the test button is pressed, it indicates a fault, and the device should be replaced immediately by a qualified electrician.

What does a 2-pole configuration mean for this Siemens RCD?

A 2-pole configuration means the Siemens 5SU9326-1CN06 has two independent switching poles. These poles are designed to simultaneously disconnect both the Line (L) and Neutral (N) conductors of a single-phase circuit.

This ensures complete isolation of the protected circuit from the power supply in the event of an earth leakage fault. It also simplifies wiring by ensuring both conductors are switched together.

It is important to note that this 2-pole device is intended for single-phase systems and should not be used on three-phase circuits.

What are the main advantages of using Siemens earth leakage protection devices?

Siemens earth leakage protection devices, like the 5SU9326-1CN06, offer high reliability and robust protection against electrical hazards. They are manufactured to meet stringent international safety standards, ensuring consistent performance.

These devices incorporate advanced technology for accurate detection of earth leakage faults, minimizing false trips while maximizing safety. Their durable construction also ensures a long service life and minimal maintenance requirements.

Furthermore, Siemens products integrate seamlessly within broader Siemens electrical installation systems, offering a comprehensive and dependable solution for electrical safety.

What troubleshooting steps can be taken if the Siemens 5SU9326-1CN06 trips repeatedly?

If the Siemens 5SU9326-1CN06 trips repeatedly, it indicates a persistent earth leakage fault in the protected circuit or connected equipment. The first step is to identify which appliance or circuit is causing the issue.

Try switching off all connected appliances and then reset the RCD. If it holds, turn on appliances one by one until the RCD trips again, isolating the faulty device.

If no appliance is faulty, or if the RCD trips even with all loads disconnected, there might be an insulation issue within the wiring itself, requiring inspection by a qualified electrician.