Rockwell-automation 150 MNL/SMC DIALOG+/APP-PROD GUIDE Manual do Utilizador descarregar pdf (Página 44)

SMC Dialog Plus Smart Motor Controller

3-7

Phase Rebalance

As little as 4% supply voltage unbalance can result in a 20% current

unbalance and a 25% increase in motor temperature, possibly

triggering a premature failure of the motor. The SMC Dialog Plus

controller continuously monitors the incoming three-phase line

voltage balance and adjusts the output voltage automatically to

balance the three-phase currents drawn by the motor.

Figure 3.9 Phase Rebalance

Notes: (1) Phase Rebalance is not active during bypass operation.

(2) Phase rebalance requires the use of the converter modul

(Bulletin 825) and fanning strip (Cat. No. 150-NFS).

Metering

The SMC Dialog Plus controller contains several power monitoring

parameters as standard. These parameters include:

• Three-phase Current • Three-phase Voltage

• Power in kW • Power Usage in kWH

• Power Factor • Elapsed Time

• Motor Thermal Capacity Usage

Fault Indication

The SMC Dialog Plus controller monitors both the pre-start and

running modes. If the controller senses a fault, the SMC Dialog Plus

controller shuts down the motor and displays the appropriate fault

condition in the LCD display. The controller monitors the following

conditions:

• Open Gate • Line Fault

• Undervoltage • Underload

• Overvoltage • Excessive Starts/Hour

• Voltage Unbalance • Overtemperature

• Phase Reversal • Stall

• Power Loss • Jam

• Overload • System

Any fault condition will cause the auxiliary contacts to change state

and the hold-in circuit to release.

SMC Dialog Plus

Supply

Voltage

501V

480V

462V

Motor

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Rockwell-automation 150 MNL/SMC DIALOG+/APP-PROD GUIDE Manual do Utilizador Página 44