Transformer & Switchgear
Off-line Testing

Digital Resistance ReporteR - Model DRR-100™
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The DRR-100 instrument can precisely measure and save 1000, three-phase contact resistance measurements on circuit breakers, switches and bus bar joints in a high voltage environment. Each measurement file also stores device information such as serial number, location, designation, ratings and other useful details. Results can be printed out by the 40-character-wide built-in printer, or easily transferred to a PC via RS-232 and USB ports or memory-stick.

Digital Resistance ReporteR Features
  • Precise contact resistance measurement at 100A
  • Continuous mode for trouble shooting
  • True dc current is ramped up and down
  • High input insulation level. Accurately measures resistance on components with up to 1000 Volts of induced noise
  • Neutralizes galvanic effect of dissimilar metals
  • Easily transfer stored data to memory stick or PC via USB port
  • ReporteR Software (included) makes report preparation fast and easy
  • A large, color multi-language LCD screen and a keyboard
  • Extensive memory for test results
  • A 40-character-wide built-in printer
  • Compatible with Microsoft Excel® and Microsoft Word®
High Resolution and High Accuracy

The DRR ReporteR instrument features 4-1/2-digit resolution and 0.5% accuracy for precise measurement of low resistance. The instrument includes auto-ranging, and is specifically designed for rough usage. It is also able to function reliably in energized EHV substations where high electrical and magnetic fields are frequently present.

Smart ramping to avoid nuisance tripping

Pure dc output current is preset by operator to a value between 10-100 Amps and is applied for a preset time period of between 10-60 seconds. The current is smoothly ramped up and down automatically to prevent current transients that can lead to unwanted operation of protection relays.

Automated Report Generation

Once the test results are transferred to a PC, they are managed by ReporteR Database that allows files to be filtered and sorted. The DCT ReporteR Software generates reports using a standard test form. The reports are compatible with Windows MS Word and Excel.