ABB UNITROL F Automatic dual channel voltage excitation regulator device AFT AVR:applytogradeandbelow1000MWgeneratingunits SES:applytogradeandbelow135MWgeneratingunits -optionalstandardchannel(SFE)orautomaticdual-channelconfiguration(AFT) SFE for the single automatic channel (PID regulation) with a manual channel (PI regulation.AFT is dual-channal , each with a channel manually by independent UNITROL F excitation module and each module has all the AVR features with independent power bridge, the two track each other mutual hot standby. One online channel, another channel rectifier bridge control pulse is blocked.Switching logic: A fault automatically access channel B(automatic), B-channal(automatic) re-fault, if the A-channel(automatic) fault recovery switch to the A-channel, or switch to B-channal(manual., Exciting with flu-loop system, B channel manually to a sense of failure was cut to transfer. Note: The switch logic with UNITROL 5000 -Operationalcontrolmode constantvoltage, constantcurrent, constantreactive, constantpowerfactor -SoundMonitoring, restrictionsandprotection See"ABBUNITROLFautomaticvoltageregulatordeviceanditsapplication" -Hand-speakinglocalcontroler(UNS0874) Hand-speakinglocalcontrolUNITROLF/5000, connectthecontrolmodulethroughSerialRS485
