For 3-Phase Power Distribution &
Motor Control Circuits
This one-day class teaches you
to read and interpret electrical drawings for power distribution
and motor control circuits. The two types of drawings used for
these purposes are completely different. The drawings used for
power distribution are called single line diagrams while those
used for motor control circuits are called ladder drawings.
The ability to read your single line drawings is necessary if
you are involved with maintaining, troubleshooting, or upgrading
your power distribution equipment. Single line drawings are also
required to perform arc flash calculations.
Once the power is delivered close to the motor or other
utilizing equipment, it is controlled with lower voltage control
circuits whose operation is shown in the form of ladder drawings.
To understanding the operation of these motors and equipment and
more importantly to troubleshoot it you must be able to read these
drawings as well. In addition to standard motor control such as
start/stop, forward/ reversing and two speed, many additional
auxiliary devices: switches, relays, time-delays etc are also
discussed. Included are typical drawings for motor control center
buckets as well as how to understand wiring diagrams for locale
and remote control
Drawing standards covered in the class include ANSI / IEEE /
NEMA symbols for equipment made in North America and the newer IEC
symbols used in the international community. We will teach you
what the symbols mean, how all the pieces fit together and have
you tracing through and understanding your drawings by the end of
the day
Course Objectives
Persons successfully completing this course will be able to:
►Identify and explain the symbols used for power distribution and
motor control circuits
►Use and interpret single line power distribution drawings
►Use and explain motor control center and motor control circuit
drawings
►Read and understand ladder drawings and wiring diagrams
►Effectively use your drawings to troubleshoot
►Utilize your single line drawings for arc flash calculations
You will be able to immediately apply what you have learned on the
plant floor
