• The drive is to be used in a heated, indoor controlled environment. The drive must be
installed in clean air according to the enclosure classification. Cooling air must be clean,
free from corrosive materials and electrically conductive dust.
• The maximum ambient air temperature is 40 °C (104 °F) at rated current. The current
is derated for 40 to 50 °C (104 to 122 °F).
• The drive is suitable for use in a circuit capable of delivering not more than 100,000 rms
symmetrical amperes, 480 V maximum when protected by the UL fuses given elsewhere
in this chapter. The ampere rating is based on tests done according to the appropriate
UL standard.
• The cables located within the motor circuit must be rated for at least 75 °C (167 °F) in
UL-compliant installations.
• The input cable must be protected with fuses. The fuses must provide branch circuit
protection in accordance with the national regulations (National Electrical Code (NEC)
or Canadian Electrical Code). Obey also any other applicable local or provincial codes.
Note:
Circuit breakers must not be used without fuses in the USA. For suitable circuit breakers,
contact your local ABB representative.
WARNING!
The opening of the branch-circuit protective device may be an indication that
a fault current has been interrupted. To reduce the risk of fire or electric shock,
current-carrying parts and other components of the device should be examined
and replaced if damaged.
• The drive is equipped with UL classified fuses which provide branch circuit protection
in accordance with the National Electrical Code (NEC) and Canadian Electrical Code.
The fuses are listed elsewhere in this chapter.
• The drive provides motor overload protection. For adjustments, see the firmware manual.
• The drive overvoltage category according to IEC 60664-1 is III, except for auxiliary
power connections (fan, control, heating, lighting, cooling unit pump etc) which are of
category II.
Technical data 221
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