Countermeasures Against Deterioration Of The 400 V Class Motor Insulation - Mitsubishi Electric FR-A802-P Instruction Manual

Countermeasures against deterioration of the 400 V class motor insulation

3.4
Countermeasures against deterioration of
the 400 V class motor insulation
In the PWM type inverter, a surge voltage attributable to wiring constants is generated at the motor terminals. Especially in a
400 V class motor, the surge voltage may deteriorate the insulation. When the 400 V class motor is driven by the inverter,
consider the following countermeasures:
• Countermeasures
For the 400 V class motor, use an insulation-enhanced motor.
Specifically,
- Order a "400 V class inverter-driven insulation-enhanced motor".
- For the dedicated motor such as the constant-torque motor and low-vibration motor, use an "inverter-driven dedicated
motor".
PRECAUTIONS FOR USE OF THE INVERTER
3
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