During the operation of the inverter, if the contactor is disconnected first, it will trigger the overcurrent protection action, which may seriously damage the IGBT module. Long-term power outage will cause the internal circuit board to become damp and short-circuit, causing frequent soft failures.
Misconception 1: Connecting the electromagnetic switch or contactor
During the operation of the inverter, if the contactor is disconnected first, it will trigger the overcurrent protection action, which may damage the IGBT module in severe cases.
Misconception 2: Disconnect the AC input power supply of the inverter
Long-term power outage will cause the internal circuit board to be dampened, resulting in short-circuit phenomena, causing frequent soft failures.
Misconception 3: Installing sealed frequency converter control cabinets in open or dusty environments
The sealed control cabinet will cause poor ventilation, leading to overheating of the inverter and failure tripping.
Misconception 5: Circuit breakers replace fuses
The circuit breaker has a long response time, which may cause delayed protection and lead to equipment damage.
Misconception 6: Only consider load power selection
Only considering the load power may lead to improper use of the frequency converter, increasing the safety risk.
