Megger VIDAR – Vacuum Interrupter Tester
The Megger VIDAR Vacuum Interrupter Tester is a lightweight, portable solution designed to confirm the integrity of vacuum interrupters in circuit breakers without disassembly. By applying a controlled DC voltage, the Megger VIDAR instantly provides a clear pass/fail indication, making it a safer and more efficient alternative to traditional AC Hi-Pot testing.
Vacuum testing is a critical maintenance practice recognized by IEC and IEEE standards. The Vacuum Interrupter Tester eliminates uncertainty by using a lamp-based result system that avoids false readings caused by humidity or surface contamination.
▶ Video: VIDAR Vacuum Interrupter Tester
Why Choose Megger VIDAR?
Over time, vacuum interrupters can lose integrity as air leaks into the chamber, making the breaker unreliable. Dirt, surface deposits, or misaligned contacts can further reduce insulation distance. The Megger VIDAR allows technicians to identify these risks before failure occurs, ensuring safe operation of critical switchgear.
- Selectable 10–60 kV DC range, with one factory-customized option.
- Two-hand operation and a bright high voltage warning lamp for safety.
- Compact and rugged design suitable for substations and workshops.
- Clear green (acceptable) and red (defective) indicator lamps.
- Testing method in line with IEEE C37.20.3.
How to Use the Vacuum Interrupter Tester
- Ensure the breaker is isolated, open, and grounded to the same point as the tester.
- Attach the supplied cable set across the first vacuum bottle.
- Select the nearest voltage level specified by the breaker manufacturer.
- Activate the two control knobs simultaneously to apply the test voltage.
- Read the result: green = acceptable, red = defective.
- If red appears, repeat the test with reversed polarity to rule out false readings.
- Continue for the remaining phases, then power down and disconnect safely.
The Vacuum Interrupter Tester is delivered ready for field use, supplied with a permanently mounted 5 m cable, ground lead, and a rugged transport case.
At a Glance
- Output selections: 10, 14, 25, 40, and 60 kV DC, accuracy 0 to −15%.
- Mains input: 115/230 V AC, 50/60 Hz.
- Weight: ~7 kg; compact transport case included.
- Designed for use in medium- and high-voltage substations and industrial settings.
For full specifications and safety precautions, always consult the official user documentation before operating the Megger VIDAR Vacuum Interrupter Tester.
❓ Frequently Asked Questions (FAQ)
What makes the Megger VIDAR different from other Vacuum Interrupter Testers?
A. Unlike heavier AC units, the Megger VIDAR offers lightweight portability and simple pass/fail results, reducing operator error.
Does the Vacuum Interrupter Tester follow international standards?
A. Yes. The test method aligns with the IEEE C37.20.3 DC withstand approach and IEC guidance for vacuum breaker testing.
What is included with the Megger VIDAR?
A. Each unit comes complete with a permanently mounted cable set, a grounding lead, and a durable transport case.