STX40
Get the job done in all weathers and challenging terrain
The STX40 is an outdoor unit with exceptional all-terrain mobility, for easy and dependable on-site use in all conditions. The unit is weatherproof with a rating of IP43. It can be easily transported in difficult terrain due to its low weight, pneumatic tyres and low center of gravity: compared to its predecessors it weighs 80 kg (176 lbs) less.
The sunshine-proof display with anti-glare coating keeps the user interface clearly visible even in intense sunshine, while its wide operating temperature range provides reliable operation whether you are in the desert in +55°C or somewhere near the polar circle in -20°C.
Find cable faults quickly and easily with convenient automated controls
Unlike older units with their extreme overload in terms of knobs, buttons, levers and variacs, the STX40 is a fully automated system: just tell the system what to do and it will set itself up automatically and accurately without any further user intervention.
Navigating the menus is straightforward and self-explanatory thanks to STX40’s intuitive graphic user interface, which can be operated either by a single rotary knob or via the display’s touchscreen function.
Both the selection of all high voltage operating modes, and the execution of all high voltage functions and methods are automated via software-controlled motorised switches. That means the STX40 offers the same convenience and comfort of a centrally controlled cable test van.
Always have the right tool at hand with 7 built-in testing methods
Since low impedance faults and high impedance faults have different specific characteristics, not every fault location method is applicable to every fault. To effectively find faults on underground cables, the best approach is to have a whole toolbox of various methods which complement one another.
To help you achieve this, the STX40 provides seven different testing methods fully integrated in a single robust housing. The unit has an in-built TDR of the Teleflex® type for time domain reflectometry, with an insulation testing unit, a very powerful high voltage DC source, a multi-stage surge wave generator (thumper) for pinpointing with the digiPHONE +2, a high frequency burner for fault conversion, and a set of standard radar-based and transient prelocation methods.






About the product
With its single rotatory knob or touch screen control and its fully automated motorised HV switches, the STX 40 is the most convenient and most powerful portable fault location unit in the market.
It is ideally suited for all essential fault locating tasks, such as analysing, prelocating and pinpointing of faults on low voltage and medium voltage XLPE or EPR insulated cables. With its 40 kV DC source and a potent high frequency burner it is also highly effective on PILC cables.
7 built-in fault locating methods
The STX40 redefines the state-of-the-art: as a complete package it comes with all necessary fault locating components fully integrated in a single robust housing. The STX is the only system in its class with 7 fault locating methods built-in:
- Insulation resistance testing
- Time Domain Reflectometry (Radar)
- HV DC proof testing (DC hipot)
- Burning
- TDR-based prelocation and additionally transient prelocation methods
- Surging/Thumping in multiple voltage stages
- Sheath testing and Sheath fault pinpointing
Made for demanding outdoor use
Fault location systems have to meet steep requirements to be considered truly portable and outdoor-ready for use in the field. Units must be lightweight, rugged, very mobile in adverse terrain and as compact in size as possible. Units must also be operable in rain as well as in very bright daylight conditions with intense sunshine. With its IP43 rating, low weight and pneumatic tyres, the STX40 is the only fault locating unit in its class with this high degree of outdoor-readiness.
The STX40 also has a very wide operating temperature range. No matter whether you are fault locating somewhere in the desert in +55°C or somewhere near the polar circle in -20°C, no matter whether you are up in the mountains at high altitudes where the air is thinner or somewhere in the jungle in humid or tropical conditions – the STX40 is built for all climates.
Technical specifications
- Power source
- Mains
- Test type
- Portable cable fault location
Product documents
Software and firmware updates
STX Operating Firmware
STX Operating Firmware
latest version
For update packages that contain only one rpm file and therefore only require an update of the operating software, proceed as follows:
1. Copy the zip file to the main directory of a USB flash drive.
2. Unzip the zip file to obtain the rpm file in main directory of the USB flash drive.
3. Insert the USB flash drive into the USB port of the powered-off STX 40.
4. Turn on the STX 40.
Result: The new version of the operating software is automatically detected and installed at start-up.
Do not turn off STX 40 during the update.
MeggerBook
MeggerBook & MeggerBook Lite
MeggerBook & MeggerBook Lite Software
latest version
What’s new in version 4.0.1
Bugfix
- Data export message is now only displayed when the export is completed
- The status of the Online Map checkbox can now be changed
- Fixed an error when saving measurement data sets
- Fixed several design issues and functional inconsistencies
- Fixed several report template errors
- Fixed several problems caused by the template editor's line tool
- Added a mechanism to clean up the segments database table
Improvements
- Extended and improved the rating functions
- Added a pop-up window when saving an empty or already existing cable number
- Added a filter value to the cable detail view
- Improved runtime conversion settings
- Zoom level can now be saved, allowing the user to adjust the curve to the essential point before generating a report
Removed
- The Rating and Result fields are now removed from TDR analyses
- Leakage current values are hidden for measurements where no leakage current is measured
The setup file below is suitable for the installation of both MeggerBook (full version) and MeggerBook Lite (free limited version).
When started with after adding the electronic license key into the installed software, the software starts as MeggerBook full version which allows for easy and comprehensive data evaluation, data archiving, cable management and report creation. A personal quotation for a certain number of licenses can be requested here . The new electronic license key allows for 3 devices to have MeggerBook full version installed on them.
The dongle key licenses from older versions of MeggerBook are not supported with this newer version. Updated electronic license keys can be requested here for previous customers.
Without the required software license key the software starts as MeggerBook Lite which allows for seamless report creation and offers some of the features as the full version while limiting the data storage options as follows:
• Measurements, analyses and reports are not permanently stored in the database
• While cable import and storage are not limited, a maximum of 5 cables can be created using the cable editor of the Lite Edition
At this time, the software can handle the measurement and test data of the following Megger devices:
Test vans: Centrix, Centrix City, Compact City, R30, Variant
Test systems: VLF Sine Wave 45 / 62, VLF CR 40/60, TDS 40/60
TDRs: Teleflex VX(-P), Teleflex SX
Note for test systems VLF Sine Wave 45 and VLF Sine Wave 62:
Data of these test systems can only be imported into the software, if the test systems is equipped with firmware version 3.14 or higher. The latest firmware can be found here (VLF Sine Wave 45) and here(VLF Sine Wave 62).
FAQ / Frequently Asked Questions
Old paper-lead cables pose a big challenge when fault locating due to their different physical construction compared to modern solid dielectric cables. Instead of having to deal with carbon and air like in faulted XLPE- or EPR-insulated cables, PILC cables are made of lapped paper impregnated with mass or oil.Breaking down a fluid insulation medium, igniting and stabilising an arc in a fluid, and capturing useful fault traces with the radar is all far more difficult on paper cables than on solid dielectric cables. In particular, breakdown voltages of high resistance faults may be very high, and low resistance faults do occur significantly more often.To be truly effective on paper-lead cables, the fault location system used must have a high DC hipot, sufficient energy for cap discharge, and a modern TDR. With its 40 kV DC hipot, 2000 Joules at 32 kV and a radar with Multishot and de-attenuation features, the STX40 is well-equipped to be successful in finding faults even on PILC cables.
Occupational safety and safe working conditions are paramount for us and our customers. Therefore, Megger products are designed to be the safest in the market. The STX40 is no exception.The unit meets the strict requirements of VDE 0104. Equipped with a ground loop monitoring circuit (F-Ohm) and a touch potential monitoring circuit (F-U or F-Voltage), STX40 is a milestone and is the portable fault location system with the highest safety standards in the market by far.