ABB Furse ESP 240 D1 Surge Protector

Code: 7TCA085460R0086
  • Compact space-saving DIN housing
  • Repeated protection in lightning-intense environments
  • Working voltage (RMS) 200-280 V

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The ESP 240 D1 is a combined Type 1, 2 and 3 tested protector (to BS EN 61643) for use on single-phase 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 0 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 & Benefits

  • Very low let-through voltage (enhanced protection to IEC/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.
  • 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.
  • A 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).
  • The terminal facility allows series connection on low current supplies to eliminate high additive voltage.
    associated with connecting leads on units installed in


Install in parallel, within the power distribution board, or directly (via fuses) onto the supply feeding equipment. For low-current supplies, install in series—see installation instructions.

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 live, neutral, and earth.


  • Nominal voltage – Phase-Neutral Uo (RMS) 240 V
  • Maximum voltage – Phase-Neutral Uc (RMS) 280 V
  • Temporary Overvoltage TOV UT 350 V
  • Short circuit withstand capability 25 kA/50 Hz
  • Frequency range 47-63 Hz
  • Max. backup fuse (see installation instructions) ≤ 125 A
  • Leakage current (to earth) < 250 μA
  • Indicator circuit current < 10 mA
  • Volt free contact:(2) Screw terminal
  • Temperature range -40 to +80 °C
  • Connection type Screw terminal – maximum torque 4.5Nm
  • Conductor size (stranded) 25 mm2
  • Earth connection Screw terminal – maximum torque 4.5Nm
  • Volt-free contact Connect via screw terminal with conductor up to 1.5 mm2 (stranded) – maximum torque 0.25 Nm
  • Degree of protection (IEC 60529) IP20
  • Case material FR Polymer UL-94 V-0
  • Weight: – Unit 0.4 kg. Packaged 0.5 kg
  • Dimensions to DIN 43880 – HxDxW(7) 90 mm x 88 mm x 72 mm (4TE)
  • CN8: 8536308000

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Title Size
ESP 240 D1 Datasheet 508 KB

Additional information

Weight 0.09 kg