HAEFELY is our close partner for high voltage test equipment and instrumentation. They are the international leader in high voltage test equipment, unmatched in quality, reputation, and technology. The management and ownership of HVT have long been associated with HAEFELY and also served in various senior technology and executive positions prior to the founding of HV TECHNOLOGIES, Inc.
Tettex Instruments has been a part of the HAEFELY family since 1995. World-renowned for their precise electrical measurement instruments, they continue to market these products under the Tettex logo.
Cable Testing and Diagnostics Test Equipment
Partial Discharge Test Equipment
Tan Delta Test Equipment
Test Bay Equipment
Impulse Test Equipment
Transformer Test Equipment
Instrument Transformer Test Equipment
Calibration Equipment
Frequently Asked Questions
What is the relationship between HV TECHNOLOGIES and HAEFELY?
HV TECHNOLOGIES (HVT) is the exclusive USA partner for HAEFELY, a global leader in high voltage test equipment founded in 1904. HVT provides sales, distribution, and technical support for HAEFELY’s entire suite of high voltage testing and instrumentation solutions, ensuring US utility and industrial customers have access to Swiss-engineered precision.
Where can I find HAEFELY high voltage test equipment in North America?
You can find HAEFELY high voltage test equipment through HV TECHNOLOGIES, Inc., headquartered in Manassas, Virginia. As their premier partner, we offer the full catalog of HAEFELY high voltage products and Tettex instrumentation, including impulse generators, AC/DC test systems, and precision measuring instruments.
Which HAEFELY systems are best for transformer loss measurement?
The TMS 600 is the latest product in highly accurate transformer loss measurement. This system provides high-accuracy measurement of no-load and load losses, ensuring compliance with international standards.
What equipment does HAEFELY offer for Partial Discharge (PD) testing?
HAEFELY offers advanced Partial Discharge (PD) detectors and measuring systems, such as the DDX 9160 and DDX 9161. These systems are designed for high-sensitivity PD measurement in transformers, cables, and GIS (Gas Insulated Switchgear). HV TECHNOLOGIES supports these units with expert training and technical service.
Does HAEFELY provide portable solutions for Tan Delta and Power Factor testing?
Yes, the HAEFELY MIDAS micro 2883 is a highly popular portable Tan Delta/Power Factor tester available from HV TECHNOLOGIES. It is designed for field testing of high-voltage insulation in substations, offering a compact, all-in-one solution for capacitance and dissipation factor measurements.
Does HAEFELY equipment comply with IEC and IEEE testing standards?
Absolutely. HAEFELY high voltage test systems are engineered to meet and exceed international standards, including IEC 60060 (High-voltage test techniques) and IEEE Std 4.
Can HV TECHNOLOGIES service and calibrate older HAEFELY or Tettex instruments?
Yes. HV TECHNOLOGIES provides comprehensive repair, maintenance, and calibration services for both current and legacy HAEFELY and Tettex instruments. Our factory-trained technicians use NIST-traceable standards to ensure your high-voltage equipment maintains peak performance and accuracy.