SURGE PROTECTION
MERSEN DESIGNS INNOVATIVE SOLUTIONS TO ADDRESS ITS CLIENTS’ SPECIFIC NEEDS TO ENABLE THEM TO OPTIMIZE THEIR MANUFACTURING PERFORMANCE IN SECTORS SUCH AS ENERGY, TRANSPORTATION, ELECTRONICS, CHEMICALS, PHARMACEUTICALS AND PROCESS INDUSTRIES…
A step ahead for surge protection
G lobal expert in electrical power and advanced materials, Mersen has adapted to the I.S. 10101:2020 change in the surge protection requirements in Ireland. These Irish National Rules for electrical installations opens the need for installing surge protection devices (SPD) in a very broad spectrum from public, commercial or industrial activities and even consumer applications depending on the circumstances as stated in the section 443.4. The I.S 10101:2020 (based on the EN 62305-4 and EN 61643-12) describes the selection and the application of SPDs in the section 534. SPD selection criteria for main switchboards The SPD protection design does not depend on the fault ratings given by the transformer; it only depends on the level of exposure to potential surges. So, which SPD do we have to install in the main switchboard? In accordance with the IEC standards there are three types of SPDs: Type 1, Type 2 and Type 3. Type 1 SPDs are designed to be able to withstand the energy from a direct lightning strike. These
kinds of SPDs are usually installed in the main switchboards (at the origin of the installation) for those cases where the level of exposure to potential surges is very high, the installation includes external lighting rod protection, is in a high exposed location or is an insulated installation. What kind of Type 1+2 SPD should be selected? There exists in the market several type 1 SPDs with different discharge capacities: limp: 50Ka, 25Ka, 12.5Ka. The general recommendation is to consider a Type 1 SPD with a discharge capacity of 12.5kA, when a Type 1 is required; this is because the level of lightning in Ireland is typically much lower than the maximum stated by the standard. The electrical power segment comprises of two businesses that serve the electrical power markets: Electrical Protection and Control and Solutions for Power Management mainly for power electronics. Mersen works with the customer to integrate the products for electrical power into the customer’s application, to make it safer and more reliable.
Surge Protection Scenario .
For further information: T: +353 (0)1 453 2522; E: sales@aphaslam.ie; www.aphaslam.ie
90 | IRELAND’S ELECTRICAL MAGAZINE
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