MJ159 Megger HiPot

The MJ159 is a HiPot from Megger. HiPot, or high potential, is a class of electronic test equipment used to verify electrical insulation. Engineers use HiPot-testing instruments on cables, wires, circuit boards, appliances, electric motors, and transformers. As a product ages, its insulation may break down and result in current flow leakage. HiPot testers keep engineers safe from current leakages by detecting gaps and defects in the electronic device. Dielectric Testers, Insulation Testers, and Megohmmeters are similar to HiPot testers. Popular manufacturers include Biddle, Megger, Fluke, Associated Research, Quadtech, Instek, and Slaughter.

Additional Features:

  • No scale multiplier
  • Multiple test voltages for spot and step voltage testing
  • Guard terminal to eliminate surface leakage current
  • Insulation Resistance: 0.1 Ω - 2000 MΩ (0.1 Ω -1000 MΩ for MJ160)
  • Accuracy: ±1.25% of fsd on a 2.8 in. (71.1mm) arc length
  • Nominal Test Voltages: D.C: 100 V, 250 V, 500 V, 1000 V.
  • Accuracy: 250 V, 500 V, 1000 V +30%, -0% max. 50 V, 100 V, +40%, -0% max.
  • Midscale: 4 MΩ
  • Short Circuit Current: 1.9 mA
  • Maximum Load Capacitance: 1μF with less than ±0.1” pointer movement
  • Discharge: Up to 1 μF capacitance is discharged from 1000 V to less than 42.4 V in less than 4 secs
  • Resistance Range:0.1 Ω - 5000 Ω

The Megger MJ159 is a portable, self-contained instrument designed to give rapid and accurate measurements. Power for model MJ159 is derived from a low-voltage, hand cranked generator which has been designed to be easy to turn even under full load conditions. The low-voltage generator is connected to an electronic inverter to provide a very stable test voltage. Accuracy of measurement is unaffected by variations in the generator cranking speed and the test voltage is maintained at its rated value.

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