The PQMII-T20-C-A belongs to the GE Vernova Multilin PQMII series of multifunctional power quality monitoring devices. It is a panel-mounted, integrated unit combining high-precision three-phase metering, power quality disturbance waveform recording, and programmable control capabilities. The suffix T20-C-A denotes the configuration: T20 = 4–20 mA isolated analog transducer output; C = Control (Digital Inputs/Relays); A = Annunciator (alarm output). It is widely used in combined-cycle power plants for applications such as generator outputs, station service buses, excitation power supplies, and high-voltage distribution circuits; it interfaces with the Mark VIe control system to enable online monitoring of electrical parameters and power quality across the entire plant.
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