Mounting The Asd - Toshiba G9 Installation And Operation Manual

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Not all ASDs are equipped with internal primary power input fuses (typeform dependent). When
connecting two or more drives that have no internal fuse to the same power line as shown in Figure 1, it
will be necessary to 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. Circuit Breaker Configuration.

Mounting the ASD

CAUTION
— The following thermal specifications apply to the 230- and the 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 G9 ASD is 14° to 104° F (-10° to 40° C).
When installing adjacent ASDs horizontally Toshiba 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 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 G9 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. 254 for additional information on mounting space requirements).
Note: Ensure that the ventilation openings are not obstructed.
G9 ASD Installation and Operation Manual 15