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41 Cards in this Set
- Front
- Back
- 3rd side (hint)
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AC
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Alternating current
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ARM
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Armature
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AUTO
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Automatic
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BKR
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Breaker
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COM
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Common
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CR
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Control Relay
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CT
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Current transfer
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DC
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Direct Current
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DB
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Dynamic Braking
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FLD
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Field
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FWD
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Forward
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GRD
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Ground
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HP
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Horsepower
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L1, L2, L3
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Power Line Connections
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Single phase consists of L1 and L2 Lines only
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LS
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Limit Switch
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MAN
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Manual
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MTR
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Motor
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M
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Motor Starter
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NEG
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Negative
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NC
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Normally Closed
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NO
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Normally Open
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OL
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Overload Relay
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PH
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Phase
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PL
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Pilot light
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POS
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Positive
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PWR
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Power
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PRI
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Primary
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PB
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Push Button
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REC
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Rectifier
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REV
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Reverse
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RH
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Rheostat
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SSW
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Safety Switch
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SEC
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Secondary
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1PH
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Single-Phase
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SOL
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Solenoid
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SW
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Switch
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T1, T2, T3
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Motor terminal connections
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3PH
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Three-Phase
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TD
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Time Delay
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TRANS
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Transformer
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Using a transformer allows a lower voltage (120 V AC) for the control circuit while supplying the Three-phase motor power circuit with a higher voltage (480 V AC) for more efficient motor operation.
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PLC
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Programmable logic controllers
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Most PLC's use the ladder diagramming concept as the basis for their programming language
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