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Furse ESP KT and KE Series

Combined Category D, C, B tested protector (to BS EN 61643-21) suitable for use on ten line LSA-PLUS disconnection modules to PBX telephone exchanges, ISDN and other telecom equipment with LSA-PLUS disconnection modules. For use at boundaries up to LPZ 0B to protect against flashover (typically the service entrance location) through to LPZ 3 to protect sensitive electronic equipment.

Features and Benefits

  Low cost protection for large numbers of data and signal lines
  Very low let-through voltage (enhanced protection to BS EN 62305) between all lines - 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
  Colour of housing distinguishes electrically different protectors - avoids confusion when installed together on the same distribution frame
  Quick and easy plug-in installation
  Under power line cross conditions /PTC versions offer safe disconnection during fault duration. The unit will then auto reset once the fault has been corrected
  At larger installations ESP K10T1/2 and ESP K10T1/PTC provide all in one protection for all ten lines on a standard LSA-PLUS disconnection modules
  Use the ESP KE10 to provide trouble free earthing for up to ten ESP KT1/2s and ESP KT1/PTC (per disconnection module)
  ESP K10T1/2 have an integral earth connection making the ESP KE10 unnecessary
  ESP KT1/PTC and ESP K10T1/PTC have resettable overcurrent protection and are rated for power cross faults
  ESP KT1, ESP KT1/PTC, ESP K10T1 & ESP K10T1/PTC are suitable for telecommunication applications in accordance with Telcordia and ANSI Standards (see Application Note AN005)

Data Sheet


  For PSTN (e.g POTS, dial-up, lease line, T1/E1, *DSL and Broadband) and U interface ISDN lines, use ESP KT1 (or ESP KT1/PTC) and ESP K10T1 (or ESP K10T1/PTC)
  For S/T interface ISDN lines, use ESP KT2 & ESP K10T2
  Protect single lines with ESP KT1, ESP KT2 or ESP KT1/PTC
  Protect all ten lines on a disconnection module with ESP K10T1 or ESP K10T2


Install protectors on all lines that enter or leave each building (including extensions to other buildings).

Identify the lines requiring protection and plug-in the protector (ensuring the correct orientation) for a series connection. Plug ESP K10T1/2 directly into each disconnection module requiring protection.

ESP KT1/2 and ESP KT1/PTC must be installed via the ESP KE10 earth bar. Clip an ESP KE10 on to the disconnection module and plug an ESP KT1/2 or ESP KT1/PTC in to each line on the module that needs protecting.

In the unlikely situation that the protector is damaged, it will sacrifice itself and fail short circuit, taking the line out of commission - indicating it needs replacing and preventing subsequent transients from damaging equipment.


  ESP K10T1
  ESP K10T2

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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