EZ-THUMP 3 kV and EZ-THUMP 4 kV, model V3

Portable fault location systems for LV networks

  • Dual stage 500 J surge energy at 1.5 kV and 3.0 kV EZ-Thump 3kV only
  • Single stage 500 J surge energy at 4.0 kV EZ-Thump 4kV only
  • F-OHM HV interlock to ensure safe earthing
  • Battery and AC line operation
  • Automatic end-of-cable and fault locating
  • Transflective color display
  • ARM pre-location
  • Fault pinpointing (thumping)
  • Optional Sectionalising software*

Weighing as little as 32 kg, the EZ-Thump 3 kV is the first of its kind in the market and, with updated EZ-Thump 4 kV, this series has the most portable fault location systems specifically for shielded and unshielded low voltage power cables.

These instruments use the “Easy Go” test system, which is easy to operate, interprets the results, and requires minimal training to find faults. On-board is a TDR with a 7.6 km range and arc reflection at 3 or 4 kV respectively for pre-locating. For pinpointing, the EZ-Thump offers a surge energy of 500 J, at 1.5 and 3 kV or 4 kV respectively, DC testing for breakdown detection, and insulation resistance measurement.

This EZ-Thump series is also able to perform sheath fault testing and sheath fault location.

The units can be operated from the mains or using their internal battery. They can fit in the boot of a car, making them ideal for a flexible rapid response fault finding strategy.

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)
11.0 MB | 04/10/22
E-Tray Revision Software to determine controller version
11.9 KB | 16/09/22
ETray Software


This is the software for use in the following products:


·EZ-Restore Overdrive


1.5 MB | 04/10/22