Parker AC890 Product Manual page 124

Frame g, h & j

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Operating the Drive

Using Multiple Induction Motors on a Single Drive

A single large drive can be used to supply several smaller induction

motors provided that each individual motor has overload protection.

Conventional V/F control strategy must be enabled for use with

parallel motors. (Sensorless vector control strategy cannot be

used). See the VECTOR ENABLE parameter under VECTOR

M1/U M2/V M3/W

SET-UP menu at level 2.

The drive must be rated to supply the total motor current. It is not

sufficient to simply sum the power ratings of the motors, since the

drive has also to supply the magnetising current for each motor.

Note that the overload device will not prevent the motor overheating

due to inadequate cooling at low speed. Force vented motors may

be required; consult your motor supplier.

Figure 3.14 Single Drives supplying Multiple Motors

All motors should be connected to the drive output before the

command is given.

Restrict the total cable length on multiple motor installations as follows:

50 metres with no output choke fitted,

300 metres with choke.

890SD (Standalone) Drive: Frame G, H & J

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