Introduction: In production and life, we generally call medium- and large-capacity inverters that drive AC motors above 1KV as high-voltage inverters. According to international practice and China's national standards, the voltage above 10KV is called high pressure, and below 10KV is called medium voltage. However, because everyone is accustomed to the rated voltage of 3KV, 6KV and 10KV motor is called "high-voltage motor", so drive the relevant voltage level converter system is called high-voltage converter. When we start the high-voltage inverter, what should we pay attention to? Jiangsu D-Bees Smart Home Co., Ltd. , https://www.cI-hometheater.com
1. Closing: Inverter input power supply high voltage switch can only be closed when the frequency converter gives the “high voltage closing enable†signal;
2. Operation non-response reasons Check: The frequency converter has not been provided with "high voltage closing permit" signal, need to confirm whether the inverter control power has been closed, whether the cabinet door is closed and the bypass cabinet isolation switch is in place. Whether the inverter itself is in a fault state, in addition, check whether the system signal related to the inverter is correct.
3. Power transmission: After we turn off the high voltage switch every time, we can send power again at least 160 seconds later;
4. Motor start: When the bypass switch disconnector is at the variable frequency position, the high voltage switch of the user closes only to the inverter and the motor does not start. If you need to start the motor, you also need to send a command to the inverter;
5. Before the inverter starts working, it is better to turn off the fan baffle or pump outlet valve before starting the inverter. At the same time to confirm that the motor is not because of baffle or outlet valve is not strict and other reasons to reverse, or easily lead to over-current shutdown when the inverter starts;
6. Make sure that the fan and pump stop completely. When the inverter needs to be started, if the fan or the pump has just stopped, ensure that the fan or pump has completely stopped. Otherwise, it may easily cause overvoltage of the unit when the inverter is started.
The above is the precautions when the high-voltage inverter is started. I hope to help everyone.