Siemens 5SV4746-0 Surge and Overvoltage Protector 4P 63A 500mA

The Siemens 5SV4746-0 Surge and Overvoltage Protector is a critical component for safeguarding electrical installations. This 4-pole, 63A device offers robust protection with a 500mA sensitivity, ensuring the integrity of sensitive equipment against transient overvoltages and surge events. Its primary advantage lies in its sophisticated surge suppression technology, minimizing downtime and preventing costly equipment damage. The core features include high surge current handling capacity and rapid response times, crucial for industrial environments.

Product Specifications

| Feature                  | Specification                           |

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

| Product Type             | Surge and Overvoltage Protector         |

| Manufacturer             | Siemens                                 |

| Model Number             | 5SV4746-0                               |

| Number of Poles          | 4                                       |

| Rated Current (In)       | 63 A                                    |

| Rated Residual Current   | 500 mA                                  |

| Nominal Voltage (Un)     | 400 V AC                                |

| Maximum Continuous Voltage | 440 V AC                                |

| Impulse Discharge Current | 20 kA (8/20µs)                          |

| Voltage Protection Level | ≤ 2.5 kV                                |

| Frequency                | 50/60 Hz                                |

| Protection Type          | Type 2                                  |

| Terminal Type            | Screw Terminal                          |

| Mounting Type            | DIN Rail (35mm)                         |

| Operating Temperature    | -25°C to +55°C                          |

| Ingress Protection       | IP20                                    |

Core Features & Market Positioning

The Siemens 5SV4746-0 distinguishes itself through its Type 2 surge protection capabilities, designed to be installed at the distribution board level. This ensures comprehensive protection against indirect lightning strikes and switching surges within industrial facilities, commercial buildings, and even residential complexes. Its 63A rating makes it suitable for a wide range of applications where significant electrical loads are present. The 500mA residual current sensitivity further enhances its utility, acting as an additional layer of safety and protection for downstream RCDs (Residual Current Devices) or directly for sensitive loads. This combination of robust surge handling and residual current monitoring positions it as a high-value solution for maintaining operational continuity and safety in demanding electrical environments.

Key Application Scenarios

This surge and overvoltage protector is indispensable in scenarios demanding high reliability and equipment longevity. Common applications include protecting control cabinets for manufacturing machinery, safeguarding sensitive electronic equipment in data centers, and securing telecommunications infrastructure. It is also vital for power distribution systems in commercial buildings, hospitals, and airports, where uninterrupted power supply is paramount. In renewable energy installations, such as solar farms and wind turbine systems, the 5SV4746-0 plays a crucial role in protecting inverters and control electronics from transient overvoltages common in these environments.

Practical System Integration Guidance

Integrating the Siemens 5SV4746-0 is a straightforward process due to its standard DIN rail mounting. Installers must ensure correct polarity and connection of all four poles to effectively protect three-phase systems. The incoming power supply connects to the line terminals, and the outgoing protected power connects to the load terminals. Proper grounding is essential for optimal performance. For systems employing residual current devices (RCDs), the 500mA sensitivity of this surge protector can offer an added layer of protection, preventing nuisance tripping of downstream RCDs under certain surge conditions while still monitoring for significant fault currents.

Operation and Risk Mitigation

The 5SV4746-0 operates by diverting excess voltage surges to ground, thereby clamping the voltage to a safe level before it reaches sensitive downstream equipment. During a surge event, the protector's internal components rapidly conduct, absorbing the energy. If a significant fault current or persistent overvoltage occurs, the protector may need to be replaced, indicated by a visual indicator or a tripped circuit breaker/RCD upstream. Regular visual inspection of the device for any signs of damage or discoloration is recommended. Proper installation and adherence to local electrical codes are critical for mitigating risks associated with electrical surges and faults.

Scalability & Long-Term Value

The Siemens 5SV4746-0 integrates seamlessly into existing Siemens electrical distribution systems and is compatible with a broad range of other standard electrical components. Its modular design ensures that as electrical demands evolve, additional protection can be easily implemented. While the unit itself is not upgradable, its robust construction and reliable performance contribute to the long-term value of an electrical installation by preventing premature failure of connected equipment. Its integration into modern smart grids and IIoT (Industrial Internet of Things) platforms is facilitated by its standard electrical interfaces, enabling monitoring of surge events when used in conjunction with appropriate intelligent monitoring devices.

FAQs

What is the primary function of the Siemens 5SV4746-0?

The Siemens 5SV4746-0 acts as a Type 2 surge protector. It safeguards electrical installations from transient overvoltages. This is crucial for preventing damage to sensitive equipment.

It diverts excess voltage energy to the ground. This process happens rapidly during surge events. It ensures protected voltage levels remain safe.

This device is essential for maintaining operational continuity and reducing downtime. It protects against surges from lightning and switching operations.

How is the 5SV4746-0 installed in a distribution panel?

Installation requires mounting on a standard 35mm DIN rail. Connect the incoming power to the line terminals of all four poles.

The outgoing protected power should be connected to the load terminals. Ensure correct polarity for all connections. Proper grounding is paramount for effective operation.

Adhere strictly to local electrical codes and safety standards during installation. Consult a qualified electrician if unsure about the process.

What does the 500mA rating signify on the Siemens 5SV4746-0?

The 500mA rating refers to the sensitivity for residual current detection. It indicates the level of fault current it can detect.

This feature adds an extra layer of safety by monitoring for ground faults. It can help prevent damage from persistent overvoltages.

It is important for system design considerations, especially when used with other protective devices like RCDs. This ensures coordinated protection.

Can the 5SV4746-0 protect against direct lightning strikes?

No, the 5SV4746-0 is a Type 2 surge protector. It is designed for indirect lightning effects.

Direct lightning strikes require Type 1 surge protection devices. These are typically installed at the service entrance.

The 5SV4746-0 complements Type 1 protection by handling smaller, more frequent surges. It protects downstream equipment effectively.

What is the voltage protection level (VPL) of this device?

The voltage protection level (VPL) is ≤ 2.5 kV. This indicates the maximum transient voltage that reaches the protected equipment.

A lower VPL signifies better protection for sensitive electronics. The 5SV4746-0 offers a good balance of protection.

This parameter is crucial when selecting surge protection for specific equipment sensitivity. It ensures adequate safeguarding.

What is the maximum impulse discharge current capacity?

The device can handle an impulse discharge current of 20 kA. This is measured using the 8/20µs waveform standard.

This capacity is vital for surge protectors to effectively dissipate large surge energies. It prevents the protector itself from being damaged.

Higher impulse current ratings generally indicate a more robust surge suppression capability. This rating is suitable for many industrial applications.

Is the Siemens 5SV4746-0 suitable for single-phase applications?

While designed as a 4-pole device, it can be adapted for specific single-phase configurations. However, its primary design is for three-phase systems.

For single-phase protection, a 2-pole surge protector might be more common. Consult Siemens documentation for specific single-phase wiring.

Using all four poles ensures comprehensive protection in three-phase networks against phase-to-phase and phase-to-ground surges. It covers all conductor paths.

What maintenance is required for the 5SV4746-0?

Regular visual inspection for any physical damage is recommended. Check for discoloration or signs of overheating.

The device has an indicator for operational status; monitor this if present. If the indicator shows a fault, replacement may be necessary.

No active maintenance or cleaning is typically required. Ensure it is protected from dust and moisture according to its IP rating.

How does this device interact with Residual Current Devices (RCDs)?

The 500mA residual current sensitivity can offer protection for downstream RCDs. It helps prevent nuisance tripping during surges.

Under significant fault conditions, it will allow the RCD to operate. This ensures safety by disconnecting power.

Proper coordination between surge protectors and RCDs is essential for reliable system operation and safety compliance. Consult system diagrams.

What is the operating temperature range for the 5SV4746-0?

The operating temperature range is -25°C to +55°C. This wide range ensures reliable performance in various environments.

Adhering to this range is critical for the longevity and effectiveness of the surge protector. Extreme temperatures can degrade components.

Ensure the installation location maintains ambient temperatures within these limits for optimal functionality.