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Specification & Description
The Siemens 5SD7412-2 is a robust lightning arrester designed to safeguard electrical systems from the detrimental effects of overvoltages, particularly those caused by lightning strikes and power surges. This part is an essential component for maintaining the integrity of 3-conductor networks (L, N, PE) and is suitable for use in both commercial and industrial settings.
Crafted to meet the rigorous standards of IEC 61643-11: 2011 and EN 61643-11: 2012, the 5SD7412-2 is classified as a Type 1 surge protection device, indicating its capability to handle substantial surge currents up to 12.5 kA. Its continuous operating voltage is rated at 335V/264V AC (L-N/N-PE), ensuring compatibility with a wide range of network voltages.
The device features a clear mechanical defect indication, allowing for easy status checks and maintenance. Its compact design, with a size of 2 TE, makes it an unobtrusive addition to any electrical setup, while the DIN rail mounting method ensures a secure and straightforward installation process.
The 5SD7412-2 is constructed from high-quality materials, including an enclosure made from PA 6.6 / PBT, which provides a degree of pollution of 2 and an overvoltage category of III. The protection class IP20 ensures that all terminal connections are safeguarded against the ingress of solid objects.
With an ambient operating temperature range of -40 °C to 80 °C and a relative humidity tolerance of 5% to 95% during operation, the 5SD7412-2 is built to perform reliably in a variety of environmental conditions. Its installation altitude capability extends up to 2000 metres above sea level, further enhancing its versatility.
In summary, the Siemens 5SD7412-2 lightning arrester is a dependable and efficient solution for protecting electrical systems against the risks of overvoltages, ensuring the longevity and reliability of your electrical infrastructure.
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Frequently Asked Questions
What type of device is this and what is its primary use?
This is a lightning arrester, specifically designed for protecting low-voltage electrical systems from overvoltages and high impulse currents that may be caused by direct or indirect lightning strikes.
Can this lightning arrester be used for both TT and TN-S power distribution systems?
Yes, the Siemens 5SD7412-2 is suitable for use in both TT and TN-S power distribution systems, providing versatility in application.
What is the maximum continuous operating voltage for this arrester?
The maximum continuous operating voltage for this arrester is 335V AC for L-N and 264V AC for N-PE.
What is the nominal discharge current rating for this device?
The nominal discharge current rating for the 5SD7412-2 is 12.5 kA for L-N and 50 kA for N-PE.
What is the protection level of this arrester between N and L?
The protection level of the arrester between N and L is 1.2 kV.
How is the mechanical defect indication feature beneficial?
The mechanical defect indication feature provides a visual indication of the arrester's status, allowing for easy monitoring and maintenance without the need for an external power supply.
What is the mounting type for this arrester?
This arrester is designed to be mounted on a DIN rail, which is a standard type of rail used for mounting industrial control equipment inside equipment racks.
What is the ambient operating temperature range for this device?
The ambient operating temperature range for this device is from -40 °C to +80 °C, making it suitable for a wide range of environmental conditions.
What is the impulse discharge current capability of this arrester?
The impulse discharge current capability of the arrester is 12.5 kA for a 1-phase system with an 8/20 µs waveform.
Does this arrester have a remote signaling contact?
No, the Siemens 5SD7412-2 does not come with a remote signaling contact.
