Smart Thump ST16-20

16 kV portable cable fault location system

  • Delivers 1500 J at 8/16 kV
  • 20-kV DC high voltage proof/burn and displays insulation resistance
  • E-Tray automatic test sequence to proof test, prelocate and pinpoint
  • ARC reflection MV cable prelocation
  • ICE MV cable prelocation
  • Multi-shot technology for ARM
  • Earth gradient LV fault locating and sheath fault locating
  • Interprets test results for user
  • 7.0 in. HiBrite color display
  • IP53 rating for wet environments
  • Safety / grounding check
  • USB interface

The SMART THUMP ST16-20 Portable/Vehicle-mounted Cable Fault Locating System provides safe, efficient and extremely easy-to-use solutions for quickly identifying, prelocating and pinpointing various types of cable faults for power cables. The ST16-20 is developed to meet the requirements for typical medium-voltage distribution cable fault location markets from 11 to 35 kV system voltage.

Typical end users include: operations department of power utility companies, electrical departments within municipalities, private network operators, high voltage electrical contractors, service companies, port authorities, mining, airports, military bases, petrochemical and paper companies.

The ST16-20 unit incorporates the “E-Tray” technology, a concept that has been already proven in other products (EZ-Thump, EZ-Restore Overdrive, and TDR T3090) and which has been carried forward into new Megger products.

Technical Documents
Technical guide
Power Cable Fault Locating Safety Notice
E-Tray Software




Prior to updating the affected products to software version 2.5.2/0.43 or later, you must first consult the factory via the contact information provided below to determine if your instrument hardware can support the upgrade. Failure to consult the factory prior to performing software upgrades could leave your instrument in a state that will require it to be sent in for repair.

Please have the following information ready before you call:

  •   Instrument model and serial number
  •   ETray Hardware revision which is determined by using the 'ETray revision software' located below. 

Contact Us

Customer Service: 1-800-723-2861

ETray Demo for PC (Windows 7 64-bit)
10.9 MB | 10/12/21
E-Tray Revision Software to determine controller version
11.9 KB | 10/12/21
ETray Software

This is the software for use in the following products:


·EZ-Restore Overdrive


1.4 MB | 10/12/21