Megger Steps up the Voltage for Insulation Analysis
- Separate high voltage amplifier enables capacitance and dissipation factor measurements at 2 kV test voltage
- True and proven DFR/FDS technology for highest performance
- Large frequency range, DC to 1 kHz
- Compact design, weight <5 kg
This high output voltage, particularly when combined with the advanced digital filtering algorithms used in the IDAX300, greatly reduces the influence of electromagnetic interference, allowing accurate and dependable results to be obtained under conditions where this would have previously been difficult or even impossible.
Speed of operation is another important benefit. Because of its efficient signal acquisition technology and the provision of two separate current measurement channels, the VAX020 + IDAX300 combination provides fast and reliable true ac measurements without the need for dc to ac conversion. Two separate measurements down to 1 mHz on a three winding transformer can be completed in about 35 minutes, whereas other instruments typically take around two hours.
In addition to allowing the IDAX300 to provide market-leading interference immunity, the VAX020 amplifier extends the capabilities of the instrument to include 50/60 Hz capacitance and tan delta measurements. The high output current capability (50 mA) of the amplifier means that it can be used with test objects with capacitance up to 80 nF at 50 Hz and 67 nF at 60 Hz. Tan delta/power factor measurements can also be made on insulating oils at up to 1,400 V rms.
The new VAX020 high voltage amplifier from Megger has an operating temperature range of -4ºF to +131ºF (-20ºC to +55ºC) making it suitable for use in even the toughest of conditions. It is supplied in a custom transport case, complete with a 10 ft (3 m) multicable to link it to an IDAX3, a 65 ft (20 m) high voltage cable, and an interlocking device.