High voltage tester, Insulation tester & Null Meter

• Measures high voltages in electrical systems and equipment.
• Used for testing insulation integrity, verifying voltage levels, and troubleshooting electrical faults.
• Types include:
  • Megger: Measures insulation resistance with high DC voltages.
  • Hipot tester: Applies high AC or DC voltages to test insulation breakdown strength.

Typical Specifications:

• Voltage Range: 500 V to 100 kV or higher
• Accuracy: 0.5% to 5%
• Resistance Range: 1 MΩ to 10 TΩ
• Additional Features: Test current measurement, insulation leakage detection, digital display, data logging

• Insulation Tester

  Description:

  • Specifically measures insulation resistance to assess its condition and prevent electrical hazards.
  • Essential for maintaining electrical safety in power systems, appliances, and wiring.
  • Types include:
    • Digital insulation testers: Provide numerical readings and advanced features.
    • Analog insulation testers: Use a needle-based display for basic readings.

  Typical Specifications:

  • Voltage Range: 50 V to 10 kV
  • Resistance Range: 1 MΩ to 2000 GΩ
  • Accuracy: 2% to 5%
  • Additional Features: Insulation fault detection, memory storage, auto-ranging

  Null Meter

  Description:

  • A highly sensitive instrument for measuring small voltages or currents by achieving a “null” or zero reading on a galvanometer.
  • Often used in bridge circuits for precise resistance, impedance, or inductance measurements.

  Typical Specifications:

  • Sensitivity: 1 μV or less
  • Resistance Range: 1 Ω to 1 MΩ
  • Accuracy: 0.1% to 1%
  • Additional Features: Internal calibration, adjustable sensitivity, multiple ranges

  Important Safety Note:

  • Always follow appropriate safety guidelines and use certified equipment when working with high voltages.
  • Consult qualified professionals for guidance on specific testing procedures and equipment selection.