Mounting The Asd; Enclosure And Conduit Plate Dimensions - Toshiba H9 ASD Installation And Operation Manual

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 circuit-breaking configuration that will ensure that if a short circuit occurs in ASD 1, only
MCCB2 trips, not MCCB1. If it is not feasible to use this configuration, insert a fuse between MCCB2
and ASD 1.
Figure 1. Typical Circuit Breaker Configuration.

Mounting the ASD

CAUTION
— The following thermal specifications apply to the 230-volt and 460-volt ASDs ONLY —
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 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 (-10° to 40° C).
When installing adjacent ASDs horizontally TIC recommends at least 5 cm of space between adjacent
units. However, horizontally mounted ASDs may be installed side-by-side with no space in between the
adjacent units — side-by-side installations require that the top cover be removed from each ASD.
For 150 HP and above ASDs, 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 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 and Conduit Plate Dimensions on pg. 254 for
additional information on mounting space requirements).
Note: Ensure that the ventilation openings are not obstructed.
H9 ASD Installation and Operation Manual 15
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