BENSHAW RSi S4 Series, User Manual

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4.3.3 Power Lugs for 100-150-200HP CT
4.3.4 Megger/Dielectric Test
Consult factory before performing a Megger/Dielectric test.
Wire Size Burndy Manufacturer Part Number
1/0 YA25-L6BOX
3/0 YA27-LBOX
4/0 YA28-LBOX
300 YA30-L
350 YA31-L
4.3.5 Power Cables
Before connecting line power to an RSi S4 drive, determine the configuration of the power system. If the
configuration cannot be determined with exactitude, at least have a solid understanding of how the power
system is configured. Numerous configurations of distribution transformers are in use today throughout
the world. The principal difference between these various configurations is the means used to introduce a
connection to earth ground.
The primary consideration should be to measure the voltages from line to line (all combinations in a
three-phase system) and the voltage from each line connection to earth ground. Ensure that each voltage
measurement does not exceed the input voltage rating (including tolerance) for your particular model.
If you discover different results than expected, contact Benshaw for assistance. Failure to observe these
precautions may void the warranty.
Motor Cable Shield
To effectively suppress radiated and conducted radio-frequency emissions, the shield conductivity must
be at least 1/10 of the phase conductor conductivity. The requirements are easily met with a copper or
aluminum shield. The minimum requirement of the motor cable shield of the drive is shown below. It
consists of a concentric layer of copper wires with an open helix of copper tape. The tighter and better the
shield is, the lower the emission level.
General Rules
Dimension the mains (input power) and the motor cables according to local regulations :
The cable must be able to carry the drive load current. See Power and Current Ratings starting on page
•
10.
The cable must be rated for at least 75
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° C maximum permissible temperature of conductor in
continuous use.
The inductance and impedance of the PE conductor/cable (grounding wire) must be rated according to
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permissible touch voltage appearing under fault conditions (so that the fault point voltage will not rise
excessively when a ground fault occurs).
600VAC cable is accepted for up to 500VAC. 750VAC cable is accepted for up to 600VAC. For
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690VAC rated equipment, the rated voltage between the conductors of the cable should be minimum 1
kV.
4 - CONNECTIONS