Mitsubishi FR - S500 instruction manual

(2) Wiring

CAUTION

Do not fit capacitive equipment such as power factor correction capacitor, radio noise filter or surge suppressor to the output of the inverter.

The connection orientation of the output cables U, V, W to the motor will affect the direction of rotation of the motor.

(3) Trial run

CAUTION

Check all parameters, and ensure that the machine will not be damaged by a sudden start-up.

When the load GD2 is small (at the motor GD2 or smaller) for 400V from 1.5K to 3.7K, the output current may vary when the output frequency is in the 20Hz to 30Hz range.

If this is a problem, set the Pr. 72 "PWM frecuency selection" to 6kHz or higher.

When setting the PWM to a higher frequency, check for noise or leakage current problem and take countermeasures against it.

(4) Operation

WARNING

When you have chosen the retry function, stay away from the equipment as it will restart suddenly after an alarm stop.

The [STOP] key is valid only when the appropriate function setting has been made. Prepare an emergency stop switch separately.

Make sure that the start signal is off before resetting the inverter alarm. A failure to do so may restart the motor suddenly.

The load used should be a three-phase induction motor only. Connection of any other electrical equipment to the inverter output may damage the equipment. Do not modify the equipment.

CAUTION

The electronic overcurrent protection does not guarantee protection of the motor from overheating.

Do not use a magnetic contactor on the inverter input for frequent starting/stopping of the inverter.

Use a noise filter to reduce the effect of electromagnetic interference. Otherwise nearby electronic equipment may be affected.

Take measures to suppress harmonics. Otherwise power harmonics from the inverter may heat/damage the power capacitor and generator.

When a 400V class motor is inverter-driven, it should be insulation-enhanced or surge voltages suppressed. Surge voltages attributable to the wiring constants may occur at the motor terminals, deteriorating the insulation of the motor.

When parameter clear or all clear is performed, each parameter returns to the factory setting. Re-set the required parameters before starting operation.

The inverter can be easily set for high-speed operation. Before changing its setting, fully examine the performances of the motor and machine.

In addition to the inverter's holding function, install a holding device to ensure safety.

Before running an inverter which had been stored for a long period, always perform inspection and test operation.

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