Technical Specifications General Specifications Parameter Specification Manufacturer ALSTOM (now part of GE Grid Solutions) Product Type Digital Excitation Regulator / AVR System Platform MICROREC K/C4 Digital Control Platform Application Synchronous generator excitation control (steam, gas, and hydro turbines) Processor Architecture DSP + FPGA parallel processing Sampling Frequency >10 kHz (ultra-high speed) Power Supply Parameter Specification AC Supply (System) 20 – 230 V AC, 50/60 Hz, ±15%, 6A max DC Supply (System) 50 – 250 V DC, -20% / +25%, 6A max I/O Supply 24 V DC, -20% / +25%, 16A max UPS Recommendation Uninterruptible Power Supply recommended for mains failure ride-through Control Modes Mode Description AVR (Auto Voltage Regulator) Constant terminal voltage control FCR (Field Current Regulator) Constant field current control cos φ Constant power factor control VAr Constant reactive power control Environmental Specifications Parameter Specification Operating Temperature 0°C to +60°C (industrial design) Storage Temperature -40°C to +85°C Protection Class IP20 Cooling Natural convection cooling (0.3m clearance required top and bottom) Chassis (Plug-in Cabinet) Parameter Specification Height 310 mm Width 377 mm Depth 402 mm Weight (without cards) 15 kg Weight (with cards) 30 kg Slots 5 slots Mounting 19-inch rack mounting Communication & Monitoring Parameter Specification Protocols MODBUS RTU, Profibus DP, proprietary fiber optic bus Data Recording Sequence of Events Recorder (SER) Fault Recording Oscillography / disturbance recording Key Board-Level Components (Reference) Board Type Part Number Reference Control Processor RDSP1 Analog Input IRVI20 Communication Processor CPRM1, CPRT1, CPRT2 Binary Input/Output MCRI1, MCRI2 (L54E2900YE00) Digital I/O (Vital Safety) ESVI1 (L54E1100BB00) DC/DC Converter MDMI1, MDEX1 Power Supply AMS4X Backplane/Communication BCSL1, BCEL2, BCSRx, BCEA1, BCSA1