User Manual EM303B General Purpose Inverter FC-18 ones place=1 AVR enabled (Enabled all the time) If input voltage corresponding frequency to the voltage on V/F curve, inverter will output maximum voltage to make motor work at maximum capacity. If input voltage > rated input voltage of inverter, inverter will drop the output voltage and remains V/F proportion. FC-18 ones place=2 AVR enabled automatically Inverter will adjust output voltage automatically based on the changes of load and grid power. It ensures that motor runs in constant torque at low speed or in constant capacity at high speed, and makes motor run at optimized status.
FC-18 tens place=0 AVR limit disabled AVR base fixed as 100%. FC-18 tens place=1 AVR limit enabled Inverter selects internal AVR base automatically. 8.13.14 Overvoltage Protection Control Generally DC bus overvoltage is caused by deceleration. Due to energy feedback, DC bus voltage will rise at deceleration. When DC bus voltage> overvoltage threshold: If dynamic brake is enabled, built-in braking unit is switched on. External resistor will consume part of feedback energy. Until DC bus voltage voltage, inverter will switch off braking unit automatically.
If overvoltage stall protection is enabled, inverter will stop deceleration temporarily and remains output frequency unchanged, and then energy feedback stops. Until DC bus voltage drops and be lower than lower limit of overvoltage stall voltage, deceleration will start again. See Figure 7-35 for overvoltage stall protection at deceleration. The above 2 protections are enabled in all driven modes. 151 No. Function Range Unit Default Type Overvoltage Protection Control Ones place: Not Used Tens Place: Dynamic brake options 0: Braking resistor disabled 1: Braking resistor is enabled in operation 2: Braking resistor is enabledat power-on Hundreds place: Not Used Thousands place:
Voltage stall protection mode 0.Void 1.Under voltage stall effective 2.Over voltage stall effective 3.Both under voltage stall and over voltage stall effective 2000 〇 FC-19