BENSHAW RSi S4 Series, User Manual

Page: 39 / 182

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GENERAL WIRING INFORMATION
4 - CONNECTIONS
4.1 General Wiring Information
4.1.1 Wiring Practices
When making power and control connections, the following precautions should be observed:
Never connect input AC power to the motor output terminals T1/U, T2/V, or T3/W, as damage to the
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drive will result.
Power wiring to the motor must have the maximum possible separation from all other power wiring.
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Do not run in the same conduit; this separation reduces the possibility of coupling electrical noise
between circuits.
Cross conduits at right angles whenever power and control wiring cross.
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Good wiring practice also requires separation of control circuit wiring from all power wiring. Since
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power delivered from the drive contains high frequencies which may cause interference with other
equipment, do not run control wires in the same conduit or raceway with power or motor wiring.
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NOTE: Local electrical codes must be adhered to for all wiring practices.
4.1.2 Considerations for Control Wiring
Control wiring refers to the wires connected to the control terminal strip. Select control wiring as follows:
Shielded wire is recommended to prevent electrical noise interference from causing improper
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operation or nuisance tripping.
Use only UL or CSA recognized wire.
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Control wire voltage rating must be at least 300V for 230VAC systems. It must be at least 600V for
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460 or 600 VAC systems.
See table below for a summary of power terminal control wiring specifications.
4.1.3 Considerations for Power Wiring
Power wiring refers to the line and load connections made to terminals L1/R, L2/S, L3/T, and T1/U, T2/V,
T3/W respectively. Select power wiring as follows:
Use only UL or CSA recognized wire.
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Wire voltage rating must be a minimum of 300V for 230VAC systems or 600V (Class 1 wire) for
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460VAC or 750V (Class 1 wire) for 600VAC systems .
Grounding must be in accordance with NEC and CEC. If multiple RSi S4 drives are installed near each
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other, each must be connected to ground. Take care to not form a ground loop.
Wire gauge must be selected based on 125% of the continuous input current rating of the drive. Wire
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gauge must be selected from wire tables for 75 C insulation rating, and must be of copper construction.
The 230V 7.5 and 15 HP models, and the 460V 30 HP models require 90 C wire to meet UL
requirements.
See chapter 2 on page 10 for the continuous output ratings for the drive.
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NOTE: TECK cables are not recommended for use with the S4 due to it’s higher capacitance to
ground which can adversely affect VFD operation.
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NOTE: For conduit installations, based on NEC table 310-16 ambient temperature of drive at 40 C.
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NOTE: Refer to page 34 for information on motor lead lengths
S4 Size / Models Specifications
All sizes / Models
4.4 in-lbs maximum torque
12-24 awg wire
9/32” strip length