CHAPTER 8: TRANSFORMER M&D DEVICE DATA
845 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL 8–3
DEVICE TYPE
Range: None, Transfix, DGA 500, Minitrans, HM2
Default: None
This setting defines the type of M&D DGA device being used with the 845 relay on the
Modbus protocol. Supported device types include Transfix, DGA 500, Minitrans and HM2.
Device Data
The Device Data menu item provides the device ID and serial number of the DGA device
connected to the 845
relay.
Dissolved Gas Analysis
The 845 relay reads gas ppm values at regular intervals of time based on the DGA device
type and displays the latest gas ppm values along with a measurement date/timestamp.
For HM2 DGA device types, data is read at 15 minute intervals. For Transfix, DGA 500 and
Minitrans device types, data is read based on the scheduler configuration in the device. In
addition to gas ppm data, basic diagnostic information on DGA device hardware and
components is also provided.
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