Cutler-Hammer - Eaton Canada

Where to Locate Drive
Consider the following:
1. Locate the drive in an area consistent with
the environment specifications listed in the
Specifications section of this manual.
Mount enclosures away from heavy and
overhead construction.
2. Select the type of enclosure that meets your
application.
Note: Standard AF93/IS903 NEMA 1 drives
can withstand an ambient temperature of
122¡F (50¡C) up to 3,300 feet (1000 meters)
above sea level. Standard AF93/IS903
NEMA 12 drives can withstand an ambient
temperature of 104¡F (40¡C) up to 3,300 feet
(1000 meters) above sea level. If you install
the drive in an optional enclosure, the
maximum temperature is derated.
If you install an enclosure at temperatures
exceeding these values, you must derate the
unit as follows:
For every 9¡F (5¡C) over the rated
temperature you must derate the
AF93/IS903 current ratings by 10%.
However, do not exceed a maximum of
131¡F (55¡C) under any circumstances.
In addition for every 1000 feet (300 meters)
above the rated altitude, you must derate the
AF93/IS903 current ratings by 2%.
Pre-Installation
INSTALLATION
3. Refer to the illustrations in the Drawings
section of this manual for the mounting
dimensions of each enclosure.
4. Make sure there is plenty of ventilating
space surrounding the drive. Refer to the
illustrations in the Drawings section of this
manual for ventilation clearances.
AF93/IS903 Instruction Manual
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