Rockwell Automation 7000 PowerFlex Medium Voltage Air-Cooled (B Frame) Installation - ForGe Control - Manual (Page 36)

36 Rockwell Automation Publication 7000-IN007E-EN-P - June 2014
Chapter 3 Drive Installation
IEC Component and Device
Designations PowerFlex 7000 electrical drawings use IEC-based conventions, while remaining
compatible with North American ANSI (American National Standards
Institute) standards. Component-identifying symbols on the drawings are
international; each PowerFlex 7000 elementary drawing (ED) set provides a full
listing of these symbols. Each ED set also lists the device designations used on the
drawings and labeling, with explanations.
Wiring identification uses a source/destination wire number convention on point
to point multi-conductor wiring and elsewhere as warranted. The wire-
numbering system of unique, single numbers for multi-drop and point to point
wiring is common in general control and power wiring. Wiring that connects
between the sheets, or that ends at one point and starts at another point on a
drawing, has an arrow and drawing reference to indicate the ongoing connection.
The drawing reference indicates the sheet and the X/Y coordinates of the
continuation point. Each drawing set contains a sheet explaining this reference
system. The unique wire numbering system serves as confirmation that you are
tracing the correct wire from sheet to sheet or across a drawing. Wires in multi-
conductor cables are typically identified by color rather than by number. The
abbreviations used to identify the colors on the drawings are fully identified on a
sheet in the drawing set.
Power Wiring Selection
The following tables show general wire selections common to the PowerFlex
7000 drive installations.
General notes:
• Adherence to the following recommended field power cabling insulation
levels for medium voltage drives ensures easier start-up and operation.
Increase the cable insulation level over the default supplied for an across-
the-line application with the same rated line-to-line voltage.
• Use either shielded or unshielded cable, based on the requirements of the
distribution system designer and local standards. However, NEC requires
shielded cable for installations above 2 kV.