Rockwell Automation Publication 750-IN119A-EN-P - April 2022 71
Chapter 5 Power Wiring
Fuse and Circuit Breaker
Ratings
The tables in this section provide recommended AC line input fuse and circuit
breaker information. See the following Fuses and Circuit Breakers sections for
CE and UL requirements. The size recommendations are based on 40 °C (104
°F) and the U.S. NEC. Other country, state, or local codes can require different
ratings. DC link fuse recommendations for DC input drives are also provided.
Fuses
The recommended fuse types are listed here. Select a fuse rating within the
range that is specified in the tables starting on page 72
.
• CE — Type gG fuses
• UL — Fast-acting Class J, T
Circuit Breakers
The non-fuse listings in the following tables include inverse time circuit
breakers, and 140M/140MT self-protected combination motor controllers. If
one of these methods is chosen for protection, the following requirements
apply, for both UL and CE installations:
• 140M/140MT self-protected combination motor controllers are
acceptable if the installation conforms with the requirements that are
specified in the tables.
• Inverse time circuit breakers can only be used with a fuse that is specified
in the tables.
IMPORTANT For maximum protection of the drive and its internal components, we
recommend the use of fuses over other methods of circuit protection.
Fuses reduce the risk of drive damage from power quality events and
improve machine and process utilization.
To Next Page
Loading...
