
Use caution when setting the output frequency. Over speeding a motor decreases its ability to deliver torque and may result in damage to the motor and/or the driven equipment.
Not all H9 ASDs are equipped with internal primary power input fuses (HP dependent). When connecting two or more drives that have no internal fuse to the same power line as shown in Figure 1, select a
Figure 1. Typical circuit breaker configuration.
Mounting the H9 ASD
CAUTION
— The following thermal specifications apply to the 230- and the
Install the unit securely in a well ventilated area that is out of direct sunlight.
The process of converting AC to DC, and then back to AC produces heat. During normal ASD operation, up to 5% of the input energy to the ASD may be dissipated as heat. If installing the ASD in a cabinet, ensure that there is adequate ventilation.
DO NOT operate the H9 ASD with the enclosure door open.
The ambient operating temperature rating of the 3.0 to 20 HP H9 ASD is 14° to 104° F
The ambient operating temperature rating of the 25 HP and above H9 ASDs is 14° to 122° F
The aforementioned thermal specifications apply to the 230- and the
When installing adjacent ASDs horizontally Toshiba recommends that there be at least 5 cm of space between adjacent units. However, horizontally mounted ASDs may be installed
For 150 HP ASDs and above, a minimum of 50 cm of space is required above and below adjacent units and any obstruction.This space is the recommended minimum space requirement for the H9 ASD and ensures that adequate ventilation is provided for each unit. More space will provide a better environment for cooling (see the section titled Enclosure Dimensions and Conduit Plate Information on pg. 256 for additional information on mounting space requirements).
Note: Ensure that the ventilation openings are not obstructed.
H9 ASD Installation and Operation Manual | 15 |