Product Change Notice
Tan DeltaTD-34E is Discontinued;TD-65E is Standardized for VLF-E Series
HVI’s line of Tan Delta Transducers, used as accessories to the VLF-E Series of Very Low Frequency AC testers, has been changed. The TD-34E, formerly paired with the VLF-34E, has been discontinued. The TD-65E, already produced by HVI and paired with the VLF-65E model, will now be offered as an accessory to either VLF-E model. HVI is pleased to announce a standardized offering for Tan Delta testing with our VLF-E Series, one that effectively balances price and functionality. The TD-65E remains an effective choice for measuring, benchmarking and monitoring the deterioration of cable insulation in MV and HV applications.
Product Line Changes
HVI has now standardized the Tan Delta accessory model used with the VLF-E Series, both the 0-34 kV AC VLF-34E, and the 0-65 kV AC VLF-65E. The same E Series software will be used for operations, data logging and report generation. The TD-65E is a slightly larger model than the TD-34E but is now compatible with either VLF model. Depending on the specific firmware version in your VLF model, a firmware update may be needed.
The output cables formerly shipped with VLF units are not interchangeable between Tan Delta models. When ordering either the VLF-34E or the VLF-65E, you must order the appropriate output cable to connect the TD module to the mating VLF unit. Please note:
- When ordering a VLT-34E, the cable needed to connect to the TD-65E is: Cable P/N 88-5061.
- When ordering a VLT-65E, the cable needed to connect to the TD-65E is: Cable P/N 81-5220
VLF Series: Electro-mechanical models
VLF-E Series: Solid state computer controlled
HVI Products Summary