• The drive is suitable for use on a circuit capable of delivering not more than
65000 rms symmetrical amperes, 480Y/277 V maximum (480 V drive types), when
protected by a Type E combination motor controller specified by ABB.
• 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 UL-rated fuses, or the ABB Type E manual
motor protectors (MMP) listed in this manual. The fuses or the manual motor
protectors provide branch circuit protection in accordance with the National Electrical
Code (NEC) and 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 integral solid state short circuit protection of the drive does not provide branch
circuit protection.
• The drive provides motor overload protection. For adjustments, see the firmware
manual.
• The drive overvoltage category according to IEC 60664-1 is III.
Disclaimers
￭ Generic disclaimer
The manufacturer shall have no obligation with respect to any product which (i) has
been improperly repaired or altered; (ii) has been subjected to misuse, negligence or
accident; (iii) has been used in a manner contrary to the manufacturer’s instructions; or
(iv) has failed as a result of ordinary wear and tear.
Technical data 153
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