TECO-Westinghouse A510, Инструкция по эксплуатации, Страница: 308 / 459

4-233
11-21
11-21
Voltage Limit
Output
Voltage
Figure 4.4.89 Voltage limit value of commissioning operation
11-22: Adjustment time of automatic energy saving
Sets sample time constant for measuring output power.
Reduce the value of 11-22 to increase response when the load changes.
Note: If the value of 11-22 is too low and the load is reduced the motor may become unstable.
11-23: Detection level of automatic energy saving
Sets the automatic energy saving output power detection level.
11-24: Coefficient of automatic energy saving
The coefficient is used to tune the automatic energy saving. Adjust the coefficient while running the inverter on
light load while monitoring the output power. A lower setting means lower output voltage.
Notes:
- If the coefficient is set to low the motor may stall.
- Coefficient default value is based on the inverter rating. Set parameter 13-00. If the motor power does not
match the inverter rating.
11-29 Auto De-rating Selection
Range
0: Disable
1: Enable
The automatic de-rating function automatically reduces the output frequency by 30% of the nominal motor speed
when the inverter detects an overheat condition (heatsink).
Automatic de-rating function depends on the automatic carried frequency reduction selection (11-03).
If automatic carrier frequency reduction is disabled (11-03=0), the output frequency is reduced by 30% of the
nominal motor speed when an overheat condition is detected.
If automatic carrier frequency reduction is enabled (11-03=1), the output frequency is reduced by 30% of the
nominal motor speed when the carrier frequency is at its minimum setting.
11-29=0: Auto de-rating selection disabled, carrier frequency is based on 11-01 or 11-03.
11-29=1: Auto de-rating selection is enabled.