There are two basic designs of motor control equip ment nema and iec. Schematic symbols is part four of the motor controls eight part training series.
Arduino Nema Stepper Control With Joystick And Limit Switches
The electrical standards adopted by various nations may vary the markings and symbols used to describe electrical control products vary as well.
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Motor control nema symbols. Students will be introduced to the differences between symbols used to represent electrical and control components. The iec philosophy on the other hand is application and performance. Governing the design of nema motor control products is the nema industrial control standard ics 2.
This formal document contains all of the information about the design of electromechanical nema style motor control. Nema standards spec ify motor horsepower hp ratings speeds motor frame sizes and dimensions motor torques motor starter size. The manner in which symbols are drawn and interpreted will be discussed.
Table 1 standard elementary diagram symbols 1 table 2 nema and iec terminal markings 4 table 3 nema and iec controller markings and elementary diagrams 4 table 4 control and power connections for across the line starters 600 v or less4 table 5 motor lead connections 64 table 6 enclosures for non hazardous locations 99. The course discusses schematic symbols. Nema national electrical manufacturers association.
Whether it is a complex control system on a machine tool or a simple across the line motor starter the need to recognize and understand these symbols becomes more important. Nema ics 1 2000 r2005 r2008 r2015 industrial control and systems. To see more specific representations you can access the related link on the symbols attached to the device name basic electrical electronic symbols passive components active components logic gates digital electronic electrical test control other basic symbols symbol download.
Nema is a trade association for manufacturers of elec trical equipment and supplies.
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