Rockwell Automation 1333 Drive, 3/4-5HP, 230-575V Series D - Manual (Page 22)

Installation and Wiring
Chapter 4
4-5
!
ATTENTION: Do not proceed without reading the information
on this page. Failure to understand procedures and hazards may
result in personal injury or equipment damage. General Wiring Procedures
1. The National Electrical Code requires that a circuit breaker or fusible disconnect
switch be provided in the drive branch circuit. Providing drive input fusing
alone is not sufficient to meet NEC guidelines. The 1333 does not provide this
requirement. Selection of a branch circuit breaker or fusible disconnect should
be based on the drive input current rating. Refer to the 3-Phase and 1-Phase
Power Terminal Block Wiring sections in this chapter for mandatory AC input
fusing recommendations for drive short circuit protection.
2. The National Electrical Code requires that motor overload protection be
provided in the motor branch circuit. Parameter 6 when used with Parameter 7
provides motor overload protection. NEC however, recognizes this protection as
being provided by eutectic alloy or bi-metal overload relays. If it necessary to
meet NEC motor branch protection approval, eutectic alloy, bi-metal overload
relays or an equivalent should be installed. Refer to article 430 of the NEC and
any additional codes for specific requirements and additional information.
3. The National Electrical Code and local regulations govern the installation and
wiring of the 1333. All input and output power wiring, control wiring and
conduit must be brought through the drive conduit entry holes provided on the
enclosure. Connections to the drive must be made as shown in the following
sections and in accordance with the drive nameplate, National Electrical Code
requirements and any additional interconnection diagrams packed with the
drive.
4. The voltage on each phase of the incoming line to the drive must match the
drive input rating. Verify the drive rating by referring to the input voltage listed
on the drive nameplate. If the incoming line voltage is out of this tolerance,
equipment may be damaged or fail to operate.
5. If multiple drives are used, do not use common cabling for AC input or output
leads. If multiconductor cable is used, separate 3-conductor input and output
cable for each drive must be used.
6. All signal wiring must be run separate from power or control wiring. Verify that
shielded cable and/or conduit is used if indicated on any interconnection
diagrams or in the following sections. If shielded cable is required, shields must
be grounded at the drive end only at one of the drive ground lugs provided.
7. Nearby relays, solenoids or brake coils can produce electrical noise transients
and cause erratic drive behavior. Transient suppression networks must be added
across the coils of these devices.
8. Since most startup difficulties result from incorrect wiring, every precaution
should be taken to assure that the wiring is as indicated on the diagrams and
information packed with the drive.