ABB PCD235C101 3BHE057901R0101｜ Exciter Control Module｜

1. 64 bit floating-point high-performance excitation closed-loop AVR regulation
Equipped with a dual core 64 bit real-time floating-point processor, the computing performance significantly surpasses the PCD230A (32-bit) and PCD235B series; Integrated PSS power system stabilizer with multi loop PID closed-loop regulation, precise control of generator terminal voltage, reactive power, power factor, rotor/stator current, suitable for excitation control of large capacity generator sets in thermal power, hydropower, gas turbines, and nuclear power by ABB Group.
2. Six high-precision thyristor synchronous pulse triggering
Output six electrical isolation synchronous trigger pulses to drive a three-phase fully controlled thyristor rectifier bridge; Synchronous sampling accuracy ≤ 0.5 μ s, system dynamic response ＜ 10ms; built-in full set of generator protection algorithms: demagnetization, over excitation, under excitation, low frequency, overvoltage, out of step, rotor over temperature interlock protection for electromechanical home.
3. Integrate large capacity local I/O signal channels
The integrated analog, digital, and temperature acquisition channels can complete on-site signal acquisition and control output without the need for additional expansion of the CIO board ..：
10 channels of 24VDC digital input DI: collecting dry contacts of demagnetization switch, isolation switch, cooling fan, and circuit breaker positions;
8-way relay output DO: contact capacity 250VAC/5A, output fault alarm, unit trip, cooling fan start stop command;
2-channel analog input AI (± 10V/4-20mA): connected to PT voltage transformer and CT current transformer signals;
2-channel analog output AO (± 10V): outputs excitation current setpoint and PSS grid compensation adjustment signal;
Thermocouple/PT100 thermistor temperature acquisition channel: Real time monitoring of excitation winding and rectifier bridge heat sink temperature, automatic interlock protection for over temperature.