Siemens 5SU1356-7KK06 Double Pole Earth Leakage Residual Current Switch 6A 30mA 1P+N C

The Siemens 5SU1356-7KK06 is a high-performance double-pole earth leakage residual current switch designed for robust electrical protection. This unit, rated at 6A with a 30mA sensitivity and a 1P+N configuration with C-curve tripping, offers exceptional safety and reliability in demanding industrial and commercial environments. Its key advantages include rapid fault detection, enhanced protection against electric shock, and fire prevention capabilities, all within a compact and user-friendly design. The C-curve tripping characteristic makes it suitable for applications with moderate inrush currents, such as lighting circuits or motor loads.

Product Specifications

| Feature                        | Specification                                |

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

| Product Type                   | Earth Leakage Residual Current Switch        |

| Poles                          | Double Pole (2 Poles)                        |

| Rated Current (In)             | 6A                                           |

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

| Tripping Characteristic        | C-curve                                      |

| Number of Conductors Controlled | 1 Pole + Neutral (1P+N)                      |

| Voltage Rating                 | 230/400V AC                                  |

| Breaking Capacity (Icn)        | 6 kA                                         |

| Frequency                      | 50/60 Hz                                     |

| Mounting                       | DIN Rail                                     |

| IP Rating                      | IP20 (enclosure)                             |

| Compliance                     | IEC/EN 61009-1, IEC/EN 61009-2-1             |

Core Features & Market Positioning

The Siemens 5SU1356-7KK06 distinguishes itself through its advanced residual current detection technology, ensuring swift disconnection in the event of earth faults, thereby safeguarding personnel and equipment from severe electrical hazards. Its robust construction, complying with stringent international standards like IEC/EN 61009, positions it as a premium choice for applications demanding uncompromising safety and durability. The integrated C-curve tripping mechanism provides an optimal balance between sensitivity to earth faults and tolerance for transient overcurrents, a critical differentiator for circuits powering inductive loads. This makes the 5SU1356-7KK06 a reliable component in sophisticated electrical distribution systems.

Key Application Scenarios

This residual current switch is ideally suited for protecting circuits in commercial buildings, industrial facilities, and workshops where the risk of earth leakage faults is present. Common applications include safeguarding individual circuits for machinery, lighting systems with moderate inrush currents, socket outlets, and sensitive electronic equipment. Its 30mA sensitivity is crucial for preventing indirect contact and providing supplementary protection against fire hazards stemming from persistent earth faults. The 1P+N configuration simplifies wiring for single-phase circuits requiring neutral conductor switching.

Practical System Integration Guidance

Installing the Siemens 5SU1356-7KK06 is straightforward due to its standard DIN rail mounting. Ensure the incoming power supply is de-energized before commencing any work. Connect the live conductor to the designated line terminal and the neutral conductor to its respective terminal. The load-side live and neutral conductors are then connected to the output terminals. Proper grounding of the enclosure and associated metallic components is essential for effective earth fault protection. Verify all connections are secure and insulated appropriately.

Operation and Risk Mitigation

The primary function of the 5SU1356-7KK06 is to monitor the balance of current flowing in the live and neutral conductors. If an imbalance, indicative of current leaking to earth, exceeds the 30mA threshold, the switch will rapidly disconnect both the live and neutral conductors, preventing electric shock and fire. The test button (usually marked 'T') should be operated periodically (e.g., monthly) to verify the internal mechanism is functioning correctly. In case of nuisance tripping, investigate the circuit for insulation faults or excessive leakage current, potentially due to device malfunction or environmental factors.

Scalability & Long-Term Value

While the 5SU1356-7KK06 is a standalone protection device, its integration into Siemens' broader electrical infrastructure solutions offers long-term value. It is compatible with other Siemens circuit breakers and components within the same product family, allowing for scalable and cohesive system design. For advanced monitoring and diagnostics, consider integrating systems that can receive status signals from such protection devices, paving the way for smart building and industrial automation applications.

FAQs

What is the primary function of the Siemens 5SU1356-7KK06?

This device acts as a safety switch. It protects against electric shock and fire hazards. It monitors current flow for earth leakages.

It rapidly disconnects power when leakage is detected. This prevents dangerous situations. It safeguards both people and property.

The 30mA sensitivity is key for personal safety. It is a crucial component in modern electrical installations.

What does "Double Pole Earth Leakage Residual Current Switch" mean?

"Double Pole" means it switches both live and neutral. This ensures complete isolation from the power source. "Earth Leakage" refers to its main protective function.

It detects when current flows unexpectedly to the ground. This is typically due to faulty wiring or equipment. It interrupts the circuit to stop the flow.

"Residual Current Switch" describes how it works. It measures the difference between outgoing and incoming current. Any imbalance triggers the switch.

What type of applications is the 5SU1356-7KK06 best suited for?

This switch is excellent for circuits with moderate inrush. Think lighting or small motor loads. It offers reliable protection for such equipment.

It provides vital safety for socket outlets. This is common in workshops and commercial spaces. It helps prevent indirect electric shock incidents.

The 30mA rating is ideal for supplementary protection. It also helps mitigate fire risks from persistent faults. It ensures a high level of safety.

What is the significance of the 30mA sensitivity rating?

A 30mA sensitivity is crucial for personal protection. It is the threshold typically considered safe for human contact. It helps prevent serious injury or electrocution.

This level of sensitivity is often mandated by regulations. It is for supplementary protection against electric shock. It also plays a role in fire prevention.

If current exceeds 30mA to earth, it trips. This rapid response minimizes exposure time. It ensures a quick disconnection of power.

How does the C-curve tripping characteristic benefit users?

The C-curve is designed for inductive loads. It allows for higher inrush currents without nuisance tripping. This is common when starting motors or certain lighting.

It provides a balance between sensitivity and surge tolerance. The switch won't trip unnecessarily during normal startup. This ensures operational reliability for equipment.

However, it still offers robust protection against earth faults. It meets safety requirements while accommodating these transient currents.

Can this switch be used in residential settings?

Yes, it can be used in residential settings. It provides enhanced safety for specific circuits. For example, it can protect circuits for washing machines or dishwashers.

Regulations often require residual current devices. This Siemens switch meets those demanding standards. It offers superior protection against electric shock.

It is particularly valuable for circuits where water is present. It ensures a higher level of electrical safety for occupants.

What are the voltage and frequency ratings for this product?

The Siemens 5SU1356-7KK06 operates at 230/400V AC. This covers standard single-phase and three-phase supplies. It is suitable for most common electrical systems.

The frequency rating is 50/60 Hz. This makes it versatile for global applications. It is designed to work reliably across these frequencies.

This ensures compatibility with various power grids. It provides consistent protection regardless of the electrical system.

How is the Siemens 5SU1356-7KK06 installed?

Installation is typically on a standard DIN rail. This is a common mounting method in electrical panels. Ensure power is off before installation.

Connect the line and neutral conductors to the input terminals. Then connect the load-side conductors to the output terminals. Proper wiring is crucial for correct operation.

Ensure all connections are secure and insulated. Follow local electrical codes and safety practices. Consult a qualified electrician if unsure.

What is the breaking capacity (Icn) of this device?

The breaking capacity (Icn) is 6 kA. This indicates the maximum fault current it can safely interrupt. It is designed to handle short-circuit currents up to this level.

This rating ensures the switch won't be destroyed. It can safely break the circuit during a fault. This protects downstream equipment and wiring.

It signifies a robust level of protection. This is suitable for many industrial and commercial applications.

What does compliance with IEC/EN 61009-1 and IEC/EN 61009-2-1 mean?

These are international and European standards. They define the requirements for residual current devices. Compliance means the product meets strict safety and performance criteria.

It assures users of the product's reliability. It has undergone rigorous testing for earth leakage protection. These standards ensure consistent quality and safety.

This certification is vital for electrical components. It guarantees the switch performs as expected. It is essential for meeting building codes and regulations.