Transformer & Switchgear
Off-line Testing

TeraOhm Insulation Testers - Model TeraOhm™
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Teraohm, is an ultra high range insulation resistance testing instrument with an output voltage of up to 5000 volts dc. It will measure up to 5 TeraOhms (5,000,000 MegaOhms). This insulation tester is suited for transformer, generator and large motor insulation resistance testing.

TeraOhm Insulation Testers
Features
  • Ultra high insulation resistance measurement up to 5 TeraOhms
  • Up to 5 kV test voltage, programmable in 50V steps
  • Automatic timing of tests
  • Polarization Index (PI) measurement
  • Dielectric Discharge Ratio (DDR)
  • Resistance VS voltage test
  • Withstanding voltage test up to 5000V
  • Automatic discharge
  • Voltage, frequency and capacitance measurement
  • Recording of test values and results in 1,000 memory locations
  • Optional software to transfer data to PC via isolated RS232 output
  • Real time clock with date
  • Rechargeable batteries

The test voltage can be selected in increments of 50 volts. The duration of the test can be set by the operator. At the end of the transformer testing period, the sample is automatically discharged and the insulation resistance is indicated on the display.

Polarization Index (PI) tests can also be automatically conducted. At the end of the test period, PI is automatically calculated. Up to 1000 results can be stored in the test instrument and can be easily recalled or transferred to a PC using the optional Windows software "TeraLink".

The instrument can also be used to measure capacitance up to 50 uF, voltage up to 600 Vac or Vdc, and frequency...

The standard instrument is supplied with rechargeable batteries, a calibration certificate and a soft sided carrying case. Batteries can be recharged using a built-in charger.