VLF Sinus und Tan Delta

SebaKMT now has a VLF Sinewave with a real 0.1 Hz sine wave voltage and an appropriate tan delta measurement system in our range.

This means that SebaKMT has all test and diagnostic methods and, with the development of these new technologies, has adapted these to current market requirements. The technologies that were used previously, such as those that successfully operate with non-destructive IRC and RVM diagnosis in the CDS, will, of course, also continue to be available. Similarly this also applies to the VLF cosine square-wave technology. Small, portable solutions with a low test performance are better implemented with sinusoidal voltages. High performance systems, for example, VLF systems with high voltages, such as those that were implemented with the VLF 80 kV, or large testing capacities from up to 25µF at 60 kV and 0.1 Hz, such as those currently supplied using 12 units for one large energy provider, are difficult to implement with a sinusoidal voltage and technically very quickly reach magnitudes that approach those of corresponding resonance test units. In this situation the 0.1 Hz VLF cosine square-wave will always remain the leading technology. This means that SebaKMT as the market leader is also the only complete provider of all diagnostic and testing technologies currently available.

Technical data

VLF Sinewave 28
- 0.7 µF at 0.1 Hz, 28 kV peak (20 kVeff)
- 5.0 µF at 0.01 Hz, 28 kV peak (20 kVeff)
- Measurement of true rms for current and voltage
- Logged via USB
- Load recognition R and C
- F-Ohm - safety monitoring
- Detection of breakdowns
- Modes of operation: Sinewave, DC+, DC-, square wave,
- Weight: approx. 23 kg

VLF Sinewave 51
- 1.0 µF at 0.1 Hz, 51 kV peak (36 kVeff)
- 5.0 µF at 0.01 Hz, 51 kV peak (36 kVeff)
- Logged via USB
- Measurement of true rms for current and voltage
- Load recognition R and C
- Detection of breakdowns
- Manual and automatic frequency adjustment
- Modes of operation: Sinewave, DC+, DC-, square wave,
- Test van fitting variations, with fully integration, e.g into the Centrix system

Tan delta test system
The tan delta test unit operates directly on HV potential.  As a result external influences and interferences are excluded as far as possible. The measurement is more accurate and can be reproduced.
Test unit for the loss factor:
- Tan delta measurement range: 1 x 10-4 to 1
- Precision:            1 x 10-4
- Resolution:            1 x 10-5
- Current range:        0.01 mA to 25mA with 0.1 Hz  
- Capacity:             3 nF to 3µF
Data is transferred to the evaluating unit by radio