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An advanced surge arrester monitor for intelligent monitoring and recording of surges in high voltage networks

EXCOUNT-II is a complete surge arrester monitoring system. It permits recording of the number of discharges seen by the arrester as well as their amplitude with time-stamp, together with measurement of the total leakage current and resistive current through the arrester. The data permits diagnostic analysis of the surge arrester's performance and state of health over time as part of a Smart Grid approach to system reliability.


  • For use with all makes and types of gapless arresters 

Why Hitachi Energy?

  • Proven safe short-circuit design 
  • No voltage added to the residual voltage of the arrester 
  • Complete monitoring of the health of the substation and the surge arresters
  • Able to detect lightning surges as low as 10 A
  • Data transfer via radio communication from a safe distance
  • Maintenance free
  • Easy to install
  • Simple to use

Brief performance data

Climatic conditions Sensor Sealed water-tight design, IP67
Short-circuit capability acc. to IEC 60099-4 kA 65
Minimum counting threshold A 10
Power supply   Built in solar cells
(Battery alternative for indoor use)
Measuring range of total leakage current mApeak 0.2 - 12
Measuring range of resistive leakage current uApeak 10 - 2000
Measuring frequency range Hz 48 - 62 Hz
Reading   Remote reading by transceiver

Download software:

Hitachi Energy continuously improve the EXCOUNT-II software. If you have an older version, please download the new version to get the advantages of the update.

The software is available separately for different operating systems. Please ensure you use the correct version.

Installation instructions

1. Unzip the file to a temporary folder (e.g. C:\Temp).
2. Double-click on the setup.exe file in your temporary folder.
3. The installation will start and just follow the instructions on the screen.

Note! The new installation will overwrite any existing installed EXCOUNT-II program, but all the saved monitor data will not be affected.

1HSA 801 080-16en Software version 2.2.5 (zip, 16.5 MB)
Note! Only for transceivers of version 4.1.1 or newer.

1HSA 801 080-16en Software version 2.1.2 (zip, 15.7 MB)
Note! Only for transceivers of version 3.1.2 and 3.1.3.

If you are using software version 1.2.6 Build 66 or lower, please uninstall existing program before installing new version.

1HSA 801 080-16en Software version 1.4.1 (zip, 15.1 MB)
Note! Only for transceivers of version 3.1.1 or older.
If you are using software of version 1.2.6 Build 66 or lower, please uninstall existing program before installing new version.

Installation and use

Due to MS Windows security settings, the user must have full administration rights to the PC to permit installation and use of the software, Furthermore, the software must be run as administrator. At first time use, it is important to install the software drivers as described in the User’s manual using the below USB driver file.

USB driver for all operating systems

Software drivers for configuration of USB connection suitable for all operating systems.
USB Driver (zip, 0.26 MB)
Note! Only for transceivers of version 4.1.1 or newer.

Download software:

Get to know more

Remote reading provides increased personnel safety compared with conventional counters. With a communication distance of up to 60 m (120 m with external antenna), the person does not necessarily have to even be inside the substation perimeter, so saving the need to arrange entry permits or have electrically trained personnel perform the work. EXCOUNT-II is our top-of-the line product combining outstanding looks with the most extensive and powerful features. Included are a variety of surge counting features together with all the essential leakage current measurement functions. EXCOUNT-II enables users to keep track of overvoltages in the network as well as providing state-of-the art

on-line condition monitoring of arresters. The measured data can then be transferred to a computer for statistical analysis. Included with EXCOUNT-II is specially designed software which facilitates download of the measured data from the transceiver and permits analysis and reporting of the collected information.

Surge registration

EXCOUNT-II does more than just count surges. It also registers the date and time as well as amplitude of the surge each time the arrester has discharged a current over 10 A. Time and amplitude measurement gives the user better information about overvoltages in the network and the operation of the surge arrester.

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