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Vanguard VBT-75 Vacuum Bottle Tester

Vanguard VBT-75 Vacuum Bottle Tester

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Product Overview: Vanguard VBT-75 Vacuum Bottle Tester

Vanguard VBT-75 Vacuum Bottle Tester

The VBT-75 is a microprocessor-based, portable, 75kV dc vacuum bottle tester. This lightweight, portable tester is designed for testing circuit-breaker vacuum bottles in the field and at the shop.

Test voltages can be selected from 10 kV dc to 75 kV dc in 5 kV steps. The high-voltage test time can be set from 5 seconds to 2 minutes. The test voltage is raised to the selected voltage and held for the test time duration. After the test time duration has elapsed and the leakage current did not pass the preset value of 100 µA, 200 µA, or 300 µA, the test voltage is returned to zero and a ‘Pass’ message is displayed. If a flash-over condition occurs, such as bottle failure, the test voltage is immediately turned off, a “Failure” message is displayed on the LCD screen, and the “TEST FAIL” LED light on the unit is also illuminated.


The presence of high voltage is indicated by an audible tone and an illuminated “HIGH VOLTAGE” LED light. For additional operator safety, an “ARM” switch must be held down during testing.


The VBT-75 features a back-lit LCD screen (16 characters by 2 lines) that is viewable in both bright sunlight and low-light levels. A turn-and-press knob is used to control the unit. An RS-232C interface port is provided for factory calibration and diagnostic testing.
The VBT-75 is furnished with a 10-foot test cable that is terminated with a quick-disconnect test clip. A transportation case is also included.

Vanguard VBT-75 Vacuum Bottle Tester Features:

  • Automatic testing
  • 10 kV – 75 kV DC output in 5 kV steps
  • Selectable test time duration from 5 seconds to 2 minutes
  • Digital voltage and current display
  • Failure indicator LED
  • Very lightweight (10 lbs./4.53 Kg)

 See more Vacuum Bottle Testers here. 

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