1. The output of the inverter for overvoltage maintenance has the function of voltage detection, and the inverter can actively adjust the output voltage, so that the motor does not bear the overvoltage, and the motor runs within the set voltage range.
2. Undervoltage maintenanceWhen the voltage of the motor is lower than 90% of the normal voltage (some are set to 85%), the inverter will be shut down for maintenance.
3. Overcurrent maintenanceWhen the current of the motor exceeds 150%/3 seconds of the rated value, or 200%/10 microseconds of the rated current, the inverter will be shut down to maintain the motor.
4. Lack of phase maintenance monitors the output voltage, when the output is out of phase, the inverter alarms, and the inverter immediately stops to maintain the motor.
5. The inverter can be set to make the motor only rotate in one direction, and the direction of rotation cannot be set, unless the user changes the phase sequence of the motor A, B, and C wiring, otherwise there is no possibility of inverting.
6. Overload maintenance inverter monitors motor current, when the motor current exceeds 120%/1 minute of the set rated current, the inverter will stop to maintain the motor.
7. The grounding maintenance inverter is equipped with a special grounding maintenance circuit, which is generally composed of a grounding maintenance transformer and a relay, and the inverter will stop immediately when one or two phases of grounding occurs. Of course, if the user requests, we can also plan for maintenance shutdown immediately after grounding.
8. Short-circuit maintenanceAfter the output of the inverter is short-circuited, it must cause overcurrent, and the inverter will be shut down to maintain the motor within 10 microseconds.
9. The overclocking maintenance inverter has the function of maximum and minimum frequency constraints, so that the output frequency can only be within the range of rules, so as to complete the overclocking maintenance function.
10. Stall maintenanceStall maintenance is generally for synchronous motors. For asynchronous motors, the stall in the acceleration process must be manifested as overcurrent, and the inverter completes this maintenance function through overcurrent and overload maintenance. Stall during deceleration can be prevented by setting a safe deceleration time during commissioning.
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