VLF Sine 37 kV
With its market-leading testable capacity of 1.6 μF @ 26 kVRMS, the VLF Sine 37 is the most powerful yet portable unit in its class, making reliable testing and diagnostics of cables longer than 5 km effortless.
The VLF Sine 37 gives you all the tools you need for medium-voltage cable testing, including withstand testing, partial discharge, integrated Tan Delta measurement, sheath testing and fault pinpointing - all in one easy-to-use solution.
Enjoy streamlined operation with a large, vibrant colour touchscreen that delivers intuitive control and seamless navigation - making even complex testing tasks simple and efficient.
Built-in memory, wireless connectivity, and comprehensive software enable you to effortlessly store, export, and analyse test results – with no need for a laptop. This ensures fast, accurate report generation and supports efficient data review, wherever and whenever you need it.
About the product
The VLF Sine 37 kV with integrated tan delta is a compact, durable, and highly portable test and diagnostic system designed for medium-voltage (MV) cable networks.
A powerful, comprehensive solution for MV cable test and diagnostics
Combining robust performance with practical mobility, the VLF Sine 37 stands out as the most powerful portable unit in its class, capable of testing up to 1.6 μF @ 26 kVRMS, making reliable testing and diagnostics of cables longer than 5 km effortless.
The unit is a truly multifunctional tool. It performs:
- VLF and DC testing
- Sheath testing and sheath fault pinpointing (with the ESG NT2 step voltage probe)
- Tan delta measurements for accurate assessment of cable condition and insulation integrity
- Can be used as a power source for partial discharge (PD) measurements to identify local problems such as workmanship issues
Thanks to its smart frequency control, the system automatically adjusts the test frequency based on cable length, ensuring testing even on 15 kV-rated cables up to 25 km long.
Intuitive interface for easy operation
The touch-enabled user interface is designed for quick setup and smooth operation. Even advanced diagnostic procedures can be performed with minimal training - making the VLF Sine 37 a time-saving asset for both routine and in-depth tasks.
Built-in Data Management
All test results are automatically analysed and stored on the unit’s large internal memory - no external PC required. Operators can easily:
- Review results directly on the device
- Export data via USB, or soon via wireless transfer to a mobile device
- Compare historical measurements, such as year-on-year test data
Flexible accessories and enhancements
The VLF Sine 37 kV can be enhanced with a range of optional accessories:
- PDS 62-SIN Partial Discharge System: When paired with the lightweight PDS 62-SIN coupler and its globally trusted software, the unit becomes a complete PD diagnostic solution, supporting withstand testing, tan delta, and partial discharge analysis in one setup.
- Custom transport cases: Designed for both the VLF unit and the PD coupler to ensure safe and convenient transport.
- Pluggable HV test leads: Available in 5, 10, or 15-meter lengths for flexible field deployment.
- Additional accessories: Including leakage current correction modules and various test adapters, expanding the system’s capabilities even further.
Discover the complete VLF Sine family
We offer a range of VLF SINE products for different voltage ranges. For more information view the VLF Sine Wave 45 and VLF Sine Wave 62.
Product documents
Software and firmware updates
MeggerBook & MeggerBook Lite Software
MeggerBook & MeggerBook Lite Software
latest version
What’s new in version 4.4.1
Updates
- Incorrect reset of the propagation speed v/2 on the Settings page
- Incorrect behavior of the Settings page when the virtual keyboard is absent
- Crash when editing report templates
- Preview pages are displayed in letter format
- During an active search, entries that are not visible can be selected
- The cable description in the report does not display any special characters (including ü¼ö¶ä¤)
- In TDR analyses, the velocity is always given in v/2
Improvements
- Database version check
- Refresh on cable changes
- Phase-resolved tanDelta trend data in BA TanDelta MWT
- Improve handling of Winkis data (Sqlite2)
- Save import/export folder path in MeggerBook
- Update TanDelta standards
- Display GPS status on map
- Display the sleeve or cable type when hovering over the cable run
New Features
- Display TE measurements properly in the activity view in MeggerBook
- The radio options on the "Language settings" page are not working well
- Extremely large Megger-mcb files due to PDF reports made manageable
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 2.0, Primeon Centrix City, Compact City, R30 2.0, Variant
Test systems: VLF Sine 34 / 37 / 45 / 62, VLF CR 40/60, TDS 40/60, Easytest 20, MFM 10
TDRs: Teleflex VX(-P), Teleflex SX-1
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).
VLF Sine 37 Firmware
VLF Sine 37 Firmware
latest version
What‘s new:
- New test modes implemented for VLF SINE 37
Bug fixes:
- Display of correct testing time -
- Update of Tan Delta step test values -
- Display of missing messages of the testing results (especially for short circuit and stopped measurement due to low load during PD)
FAQ / Frequently Asked Questions
The VLF Sine 37 can test cables up to 40km length at reduced voltage and frequency.
The VLF Sine 37 uses MeggerBook Lite, Megger’s latest data archiving and reporting software. It offers powerful functionality for data analysis and is available to users free of charge.
The VLF Sine 37 is ideal for all owners and operators of MV cable networks - including utility providers, industrial facilities, and power generation sectors such as renewables. It supports both acceptance testing of newly installed cables and testing and diagnostics for maintenance of existing systems. Whether for commissioning or ongoing maintenance, it’s a key tool for efficient asset management across the full cable lifecycle.