Megger TSX 303 TRAX Automatic Switch Box


  • Shorter test time by reducing time to connect transformer terminals
  • Increases safety by reducing “ladder time”
  • Minimizes the risk of measurement errors due to incorrect connections

The TSX 303 is intended to be used with transformers up to three windings and 8 terminals. Supported TRAX applications include winding resistance measurement (WRM) with OLTC continuity up to 16 A, transformer turns ratio (TTR) up to 250 V with simultaneous excitation current measurement and demagnetization.

Control of the switchbox as well as the tap changer is integrated in the TRAX apps in an automated test flow, minimizing the user interaction with the TRAX software.