THE SELECTION OF OUTPUT REACTOR OF INVERTER
When the output reactor of inverter cable is long the current change of the module will lead to capacitive current .then trip the inverter its output reactor of inverter. the big current of.the output could cause the inverters trip . in this cause , the output reactor is necessary to be installed,since the inverters interior and input , output lead wire have capacitance to the ground, besides, this series of
inverter is low – noise type with higher carrier frequency and the inverters leakage current to the ground is big.especially for the bigger capacity inverter .
it could lead to the wrong action of the protection circuit .when meeting the above problem , leakage protector shall be installed beside reducing the carrier frequency and shortening the lead wire . please pay attention to the following when installation leakage protector . leakage.protector shall be put at the input side of the inverter and behind the mccb . the action current of the leakage.protector shall bigger than 10 times of the leakage ( the leakage summation of circuit , radio noise filer ,motor , etc ) when the circuit is not installed with the inverter .
CONSIDERATION OF SELECTING MOTOR
1.In the vector control model, one inverter cannot drive two or more units of motors. when high starting torque is need, it is better to use vector control mode. compared to the normal commercial power supply, the inverters starting torque, the inverter to be selected shall has capacity with allowance.in the occasions which needs less notice, the carrier frequency needs to be set to be higher therefore, the allowance of the capacity shall be bigger.
THE PARTS WHICH TO BE REPLACE PERIODICALLY
to ensures the inverters interior parts and components shall be replaced or repaired periodically according to their service life. the service life of the inverters electronics parts depends on the environment and operation condition. normally when the inverter works continuously, please replace the parts according to the below the table.it is also depends on the working environment, load situations and inverters current status. the maintenance period in the below table is only for the user’s reference.
Name of parts
Standard replacement time interval