RCS-9300 Series main transformer protection and monitoring device Introduction RCS-9300 Series main transformer protection and monitoring device is suitable for 110KV and below voltage transformer sets of laps protection device. Complete protection by differential protection, backup protection and the protection of non-power components. For 110KV transformer generally available RCS-9342 (differential protection) + RCS-9341 (high pressure side backup protection and monitoring) + RCS-9343 (low pressure side backup protection and monitoring) + RCS-9344 (non-power circuit protection + operation constitutes a transformer all the protection and control functions. The main function of the differential speed off protection ● ● second harmonic restraint ratio of differential protection ● 13 remote communication open into the acquisition, telemetry, remote control ● 2-way remote alarm signal output point ● device, ● 4-way trip protection action ● 6-channel remote control export outlet