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Featured Video - PD Devices - 7th November 2013

PD Devices Interview on the Business Channel

PD Devices Interview on the Business Channel

In this video Mike Rendell, PD Devices Managing Director talks about the need for Surge Protection and the latest in the regulations that are required.

BS 7671:2008 IET Wiring Regulations Seventeenth Edition

Section 443 defines the need for Surge Protection Devices (SPD’s) and the suggested coordinated approach*

Section 534 defines the devices for the protection against overvoltage

BS EN 62305 series of Standards Defines the Protection against Lightning
Part 1 – General Principles for the Protection of structures against Lightning
Part 2 – Risk Management
Part 3 – Physical damage to structures and life hazard
Part 4 – Electrical and electronic systems within structures

BS EN 61643-11 – Requirements and tests for Low Voltage Surge Protection Devices connected to low voltage power distribution systems.

BS EN 61643-12 – Selection and application for Low Voltage Surge Protection Devices connected to low voltage power distribution systems.

BS EN 61643-21 – Requirements and tests for Low Voltage Surge Protection Devices connected Telecommunications and signalling networks.

BS EN 61643-22 – Selection and application for Low Voltage Surge Protection Devices connected Telecommunications and signalling networks.

*Surge Protection Device Coordination

BS 7671 and BS EN 62305 require the coordination of SPD, where the latter standard considers the installation of the correct device to limit the transient over-voltages at the appropriate location within the building. To facilitate this, the building is partitioned by areas or zones (Lightning Protection Zones) for which the SPD with the recommended overvoltage suppression is intended for installation. The zones are based on the degree of risk and to provide a method to ensure the protection of the equipment.

Zone LPZ 0 is outside the structure of the building and is subject to the severest threat of lightning currents and electrical fields.

Zone LPZ 1 is the first zone within the building and is prone to the induced fields and flashover into the building.

Zone LPZ 2 is the second zone within the building where the risk to electrical equipment is still high.

Zone LPZ 3 is the third and subsequent areas of diminishing risk to the equipment

Additional Information Relating to PD Devices

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