The AN-5-203 is an automatic voltage regulator (AVR) designed for Denyo DCA series diesel generators, managing voltage stability through input terminals A, B, C, D (main) and 55V-220V (auxiliary). It delivers a max excitation of 120V/5ADC with ≤ ±0.5% regulation, requiring field connections at terminals J/K and supporting external voltage trimming via a 1K potentiometer. Technical details and connection diagrams can be found at Japan Generators .
D+ and D- or Q1,Q2).Protects the generator by reducing voltage if engine speed drops below the set 50/60Hz threshold. Key Technical Specifications Rated Output Current Regulation Accuracy Field Resistance Operating Temperature -40°C to +60°C an-5-203 avr wiring diagram pdf
Usually Blue wires that provide the operating power for the AVR itself . The AN-5-203 is an automatic voltage regulator (AVR)