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Furse ESP M1 Series

Combined Type 1, 2 and 3 tested protector (to BS EN 61643) for use on mains power distribution systems primarily to protect connected electronic equipment from transient overvoltages on the mains supply, e.g. computer, communications or control equipment. For use at boundaries up to LPZ 0B to protect against flashover (typically the main distribution board location, with multiple metallic services entering) through to LPZ 3 to protect sensitive electronic equipment.

Features and Benefits

  Very low let-through voltage (enhanced protection to BS EN 62305) between all sets of conductors (phase to neutral, phase to earth, neutral to earth - Full Mode protection)
  Full mode design capable of handling partial lightning currents as well as allowing continual operation of protected equipment
  Repeated protection in lightning intense environments
  Innovative multiple thermal disconnect technology for safe disconnection from faulty or abnormal supplies (without compromising protective performance)
  Three way visual indication of protection status and advanced pre-failure warning so you need never be unprotected
  Remote indication facility allows pre-failure warning to be linked to a building management system, buzzer or light
  Changeover active volt free contact enables the protector to be used to warn of phase loss (i.e power failure, blown fuses etc)
  Flashing warning of potentially fatal neutral to earth supply faults (due to incorrect earthing, wiring errors or unbalanced conditions)
  Robust steel housing
  Base provides ultra low inductance earth bond to metal panels
  Compact size for installation in the power distribution board
  ESP 240 M1 has Network Rail Approval PA05/01832. NRS PADS reference 086/047149

Data Sheet


Install in parallel, within the power distribution board or directly (via fuses) on to the supply feeding equipment.

At distribution boards, the protector can be installed either on the load side of the incoming isolator, or on the closest outgoing way to the incoming supply. Connect, with very short connecting leads, to phase(s), neutral and earth.


  ESP 120 M1
  ESP 208 M1
  ESP 240 M1
  ESP 415 M1
  ESP 277 M1
  ESP 480 M1

Please note - Product designs and specifications are subject to change without notice. The user is responsible for determining the suitability of this product.

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