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PowerPoint to Accompany Lessons in

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Presentation on theme: "PowerPoint to Accompany Lessons in"— Presentation transcript:

1 PowerPoint to Accompany Lessons in
Electrical Controls PowerPoint to Accompany Lessons in AAVIM, Electrical Controls Textbook by Dr. James Allison PowerPoint Developed by Sidney Bell

2 Control Circuit Ladder Diagram
240 V single phase motor for a feed bin auger, controlled by a push button station, normally open limit switch and normally open motor relay

3 Normally Open Limit Switch (N.O.)
Door closed Door open Limit switch Limit switch

4 Push Button Station Normally Open START Normally Closed STOP

5 Normally Open Auxiliary Contacts

6 Motor Contactor C 120 V Coil

7 DPST NO Relay (Contactor)
Coil T1 T2 Auxiliary Contact M

8 L1 L2 T1 T2 N M

9 N L1 L2 T1 T2 M

10 DPST - NO Magnetic Starter 240V Coil
1 3 X1 X2 2 DPST - NO Magnetic Starter 240V Coil (Relay with an overload sensing component) NEC &

11 M1 M2 L1 L2 Ladder diagram of hammer mill and auger control circuit TD
THERMAL TIME DELAY Ladder diagram of hammer mill and auger control circuit

12 L2 1 MOTOR 2 TD THERMAL TIME DELAY L1

13 Hammer mill Auger L1 L2 TD THERMAL TIME DELAY MOTOR 2 MOTOR 1 L2 L2 1

14 Two 240 V Lamps Controlled by Mechanical Timers
Lamps – 240 V


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