Description
WJ Furse Enhanced Surge Protectors for Power Distribution Systems - ESP-D/DS Series * * The D/DS series provides a series of further enhancements to the existing ESP series power protector series, suitable for specific systems, and is a supplement to the existing D1 series. The D/DS series has a low allowable voltage, combined with power test types 1, 2, and 3, in compliance with BS EN 61643 standard. It is designed for low current single-phase systems (up to 10A or 32A) to prevent transient overvoltage on the circuit and provide higher exposure levels, covering lightning protection zone (LPZ) 0-3. It also features visual indication of three-way protector status and advanced pre fault warning, as well as remote indication function to BMS through voltage free contacts. The D/DS series (DS model) is suitable for low current power applications, such as CCTV cameras, alarm panels, industrial battery chargers, and telemetry equipment. It combines type 1, 2, and 3 tested protectors (compliant with BS EN 61643 standard) with very low allowable voltage, industry-leading enhanced protection, and compact DIN shell three-way protectors that comply with BS EN 62305 standard with status indication function and advanced pre fault warning remote indication function (DS model). The protectors provide repetitive transient overvoltage protection. Surge protection devices, SPD (DIN rail) voltage surges are often referred to as peak or transient overvoltages, which are usually caused by switch fluorescent lamps, fuse burnout, or nearby lightning activity. The worst voltage surges are usually caused by lightning, with voltages up to 6000V and current surges exceeding 3000A. The maximum value of voltage and current surges caused by lightning strikes depends on the location within the building's wiring system. BS7671: First revised edition in 2011, sections 443 and 534 cover risk assessment and provide guidance on electronic device protection for installation engineers to follow. The BSEN 62305 standard series provides the most compreh
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