440F-M1236FYNN A-B  Power Board

Fusing The PowerFlex 4 drive has been UL tested and approved for use with input fuses. The ratings in the table that follows are the minimum recommended values for use with each drive rating. The devices listed in this table are provided to serve as a guide. Bulletin 140M/140MT (Self-protected Combination Controller)/ UL489 Circuit Breakers When using Bulletin 140M/140MT or UL489 rated circuit breakers, the guidelines listed below must be followed in order to meet the NEC requirements for branch circuit protection. • Bulletin 140M/140MT can be used in single and group motor applications. • Bulletin 140M/140MT can be used up stream from the drive without the need for fuses.

General A variety of cable types are acceptable for drive installations. For many installations, unshielded cable is adequate, provided it can be separated from sensitive circuits. As an approximate guide, allow a spacing of 0.3 meters (1 foot) for every 10 meters (32.8 feet) of length. In all cases, long parallel runs must be avoided. Do not use cable with an insulation thickness less than 15 mils (0.4 mm/0.015 in.). Do not route more than three sets of motor leads in a single conduit to minimize “cross talk”. If more than three drive/motor connections per conduit are required, shielded cable must be used. UL installations in 50 °C (122 °F) ambient must use 600V, 75 °C or 90 °C (167 °F or 194 °F) wire. UL installations in 40 °C (104 °F) ambient should use 600V, 75 °C or 90 °C (167 °F or 194 °F) wire. Use copper wire only. Wire gauge requirements and recommendations are based on 75 °C (167 °F). Do not reduce wire gauge when using higher temperature wire. Unshielded THHN, THWN or similar wire is acceptable for drive installation in dry environments provided adequate free air space and/or conduit fill rates limits are provided. Do not use THHN or similarly coated wire in wet areas. Any wire chosen must have a minimum insulation thickness of 15 mils and should not have large variations in insulation concentricity.

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