User Manual EM303B General Purpose Inverter DC bus voltage Upper Limit of Overvoltage Stall Lower Limit of Overvoltage Stall Output Frequency Overvoltage Protection Time Figure 7-35 Overvoltage Stall Protection FC-19 tens place=0 Dynamic brake disabled Regardless how big the DC bus is, braking input power will not work. FC-19 tens place=1 Dynamic brake enabled when inverter is running. When inverter is running, DC bus voltage > overvoltage threshold, braking unit discharge starts. When DC bus voltage drops, and DC bus voltage shall be turned off immediately. FC-19 tens place=2 Dynamic brake enabled when inverter is power-on.
If DC bus voltage > overvoltage threshold, braking unit discharge starts. When DC bus voltage drops, and DC bus voltage FC-19 Thousands place=0Voltage stall protection is void. When brake resistance is connected for quicker acceleration or deceleration, set this value. FC-19 Thousands place=1Under voltage stall protection is effective. When power supply fails or bus voltage drops abruptly, to keep running normally, the inverter automatically decelerates as per proper deceleration time, and bus voltage gets normal. FC-19 Thousands place=2Over voltage stall protection is effective. Whenbus voltage tends to be over voltage, output frequency is regulated by PID to protect bus voltage quickly.
FC-19 Thousands place=3 Both under voltage stall and over voltage stall are effective. When bus voltage is not reasonable, bus voltage protection is taken by corresponding regulation. 8.13.15 Setting Overvoltage Protection Threshold 152 No. Function Range Unit Default Type FC-20 Voltage at Overvoltage Stall 120.00～140.00 % 130.00 〇 FC-21 Overcurrent Stall Proportion Gain IKp 0.00～100.00 0.10 〇 FC-22 Overvoltage Stall Proportion Gain VKp 0.00~100.00 3.00 〇 Overvoltage Integral Time VTi 0.000~10.000 0.000: No integration S 0.300 〇 FC-23