VM1000 Series
‐34‐
Do not reverse poles (+) and (-). Otherwise, it may damage the AC drive and even
cause a fire.
–– The cable length of the braking unit shall be no longer than 10 m. Use twisted
pair wire or pair wires for parallel connection.
–– Do not connect the braking resistor directly to the DC bus. Otherwise, it may
damage the AC drive and even cause fire.
C: Braking resistor connecting terminals (+)、PB
The connecting terminals of the braking resistor are effective only for the AC drive
of 22kw and configured with the built-in braking unit.
The cable length of the braking resistor shall be less than 5 m. Otherwise, it may
damage the AC drive.
D: External reactor connecting terminals P、（+）
For the AC drive of 33 kW and above, it support external DC reactor. Remove the
jumper bar across terminals P and (+) and install the reactor between the two
terminals.
E: AC drive output terminals U, V, W
The capacitor or surge absorber cannot be connected to the output side of the AC
drive. Otherwise, it may cause frequent AC drive fault or even damage the AC
drive.
If the motor cable is too long, electrical resonance will occur due to the existance
of distributed capacitance. This will damage the motor insulation or generate
higher leakage current, causing the AC drive to trip in overcurrent protection. If
the motor cable is greater than 50m, an AC output reactor should be installed close
to the AC drive.
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