The oil immersed distribution transformers are feasibly-priced devices, designed for monitoring distribution, power, dry-type transformer and wind farm transformers. The monitors optionally include 6 A, 250 V relays that are programmable by the user and may be configured for automatic fan control, alarm activation, or to automatically trip the transformer off line. Contact status (open or closed) is indicated by LEDs located in the front panel. All models include one USB and one RS-485 port for remote communication with a master station, using DNP 3.0 or Modbus protocols. The rail mount modular design allows a serial port daisy-chain arrangement to interconnect several modules, thus increasing the number of input and output signals of the system to satisfy end-user requirements.
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