Plotting Motor Starting Curve on TCC
You can plot motor starting curves on the TCC plot by:
- Opening the Coordination focus.
- Selecting the motor and other items you want to include in the TCC plot.
- Clicking Plot TCC.
Plotting an Individual Motor Curve (US Units)
The plot below shows a motor starting curve for a 50 HP motor as well as a solid state trip curve for a breaker. The motor starting curve parameters are specified in the Motor Data dialog box. After plotting the TCC, you can open the Temporary Motor Data dialog box and change the parameters for the motor starting curve.
Figure 1: TCC Plot for 50 HP Motor Start
Figure 2: Temporary Motor Data Dialog for TCC
Plotting an Individual Motor Curve (Metric)
The plot below shows a motor starting curve for a 250 kW motor as well as a solid state trip curve for a breaker.
Figure 3: TCC Plot for 250 kW Motor Start
Figure 4: Temporary Motor Data Dialog Box for TCC
Plotting Grouped Motor Curve
When plotting the starting curve for grouped motors, you need to specify the largest motor size in addition to other data required for individual motors. The plot assumes that the largest motor is starting and the rest of the motors are already operating at steady state. The current in the plot is calculated as follows:
During Acceleration:
Total Amps = Locked rotor amps of largest motor + FLA of the rest
After Acceleration:
Total Amps = Total FLA of all the motor
Plotting Group Motors (US Units)
Figure 5: Grouped Motor Data
The following plot shows the starting curves of two motors:
- Grouped motor with total of 500 HP and largest motor of 100 HP.
- Individual motor of 100 HP.
Figure 6: TCC Plot for 100 HP Individual Motor and 500 HP Grouped Motor
Plotting Group Motors (Metric Units)
Figure 7: Grouped Motor Data
The following plot shows the starting curves of two motors:
- Grouped motor with total of 500 kW and largest motor of 100 kW.
- Individual motor of 100 kW.
Figure 8: TCC Plot for 100 kW Individual Motor and 500 kW Grouped Motor
More Information
| Coordination with PowerProtector™ | |
| Plotting a TCC Curve from a One-Line | |
| Plotting Items in MCCs and Panels |
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