Project Description

SUWI Series, Combined substation test and measurement equipment


SUWI – Substation Wizard

SUWI series is designed using advanced engineering technology to perform various substation equipment tests. It can measure relay timing, Circuit-breaker contact resistance, Circuit breaker timing and transformer turns ratio. It has a current output of up to 110A AC/100A DC and a voltage output up to 150V AC/ 220V DC. It has two universal input modules. 7-inch TFT touch display allows showing all measurement results on a single screen. A rotary knob is also available to control the touch screen, which makes it twice convenient. It can be controlled by USB and users can record/store measurement results. In case setting up a Laptop or PC for the field test is difficult; users can record data to the device’s internal memory or to an external USB flash memory. Multi-language capability and user-friendly operation menu make it easy to control. SUWI is a light, compact and rugged device with the protection class IP67 (case closed).


  • Combined Substation Test Equipment
  • Relay timing measurement
  • Circuit breaker contact resistance measurement
  • Circuit breaker contact Timing measurement
  • Transformer turns ratio measurement
  • Up to 110A AC/100A DC current output
  • Up to 150V AC/ 220V DC voltage output
  • 2 universal input modules
  • Battery Powered
  • 7” colour touch display
  • Rotary knob – Touch control
  • Automatic testing of relays
  • User-friendly operation menu
  • Internal memory, USB Flash Drive
  • PC control via USB cable