A.N. Wallis & Co Ltd are one of the world’s leading Electrical Earthing, Lightning Protection and Surge Protection component material manufacturers and suppliers. To complement our highly successful material supply business, we also offer a range of Laboratory Testing Services.

Our Test Laboratory is independently accredited to ISO/IEC 17025:2017.

Our Electrical Testing scope serves applications including Lightning Protection System (LPS) components, Metal Oxide Varistor Assemblies (MOV) Surge Protection Devices, and Earthing Enhancing Compounds, but bespoke test procedures may be developed and implemented.

Our Electrical Testing capabilities include:

• Long term stability under continuous operating voltage – Clause 8.4 of BS EN 60099-4:2014, Metal-Oxide Surge Arresters without Gaps for AC Systems
• Class I Operating duty – BS EN 61643-11:2012+A11:2018 Clause 8.3.4.3
• Class I additional duty – BS EN 61643-11:2012+A11:2018 Clause 8.3.3.4
• High Current (4/10_Us) – Clause 8.7 of BS EN 60099-4:2014, Metal-Oxide Surge Arresters without Gaps for AC Systems
• Charge Transfer (rectangular wave) – Clause 8.5 of BS EN 60099-4:2014, Metal-Oxide Surge Arresters without Gaps for AC Systems
• Reference Voltage (100V to 3.3kV, 1mA to 10mA) – By application of known DC currents and measurement of the resulting voltages
• Energy withstand (peak current 1000A) – Applied rectangular pulses over the range 2 ms to 3 ms
• Contact resistance – BS EN 62561-1:2017 clause 6.4.a
• Resistivity – BS EN IEC 62561-2:2018 Clauses 5.2.1.1 and 5.2.5.2