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Rockwell Automation Publication 6000-IN100B-EN-P - October 2020
Chapter 2 Drive Electrical Installation
Electrical Drawings
Before connecting any power cables or control signal wiring, review and
understand the information that is contained in the project-specific Electrical
Drawings (ED).
They contain critical information such as:
•
Minimum power cable insulation ratings and sizes
•
Power terminal locations and designations
•
Terminal block designations for all connections to external customer
control signal wiring and control power supply cables.
The practice that is used within the PowerFlex 6000T electrical drawing is
based on the IEC or NEMA standard depending on the requirements. The
symbols used to identify components on the drawings are international.
Device designations that are used on the drawings and labeling are explained
on each drawing set.
Wiring identification uses a source/destination wire number convention on
point-to-point multi-conductor wiring and in situations where the system is
warranted. The wire-numbering system of unique, single numbers for multi-
drop and point-to-point wiring continues to be used for 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. The reference system is explained on a
sheet in each drawing set. The unique wire numbering system serves as
confirmation that the correct wire is being traced from sheet-to-sheet or
across a drawing. Wires in multi-conductor cables are typically identified by
color rather than by number. Abbreviations used to identify the colors on the
drawings are fully identified on a sheet in the drawing set.
Grounding System
Requirements
As a general guideline, the ground path must be of sufficiently low impedance
and capacity that:
•
the rise in potential of the drive ground point when subjected to a
current of twice the rating of the supply should be no higher than 4 V
over ground potential
•
the current flowing into a ground fault is of sufficient magnitude to
cause the protection to operate.
The general grounding point must be reliably connected with the grounding
network.
Attach an external ground cable to the main ground bus, in compliance with
applicable national and local electrical codes.
Run the system ground cable separately from power and signal wiring so that
faults:
IMPORTANT
The primary grounding cable must have a diameter of at least 50 mm
2
and meet all applicable national and local electrical codes.
