The TGA-B is a portable instrument specifically designed to monitor PD in motors and turbine generators equipped with Bus couplers. The TGA-B instrument determines the magnitudes, rates and polarities of voltage pulses created by partial discharges. Additional parameters such as NQNs and peak pulse magnitudes are also calculated. The instrument comes equipped with user selectable RS232, USB, or Ethernet (TCP/IP) communication modes. An external computer is used to acquire, display, and store PD test results quickly and conveniently.