Concept explainers
Whether the component is generally normally closed or open when it is used for the function of start.
Explanation of Solution
For the component that are used to start are generally normally open as initially they have open contacts and as the component is turned on the contacts get closed and the circuit starts to work.
Consider the Figure 28-2 the start button here is used to start the operation of the circuit and the other start button here is used to start the operation of the circuit. Where the other start button is connected in parallel to the already existing start button. So any one of both the switches can energize the coil M. Thus, the energized coil changes the position of the M contacts of the circuit. The contacts between the line and the load is then closed and the work starts. As the start button is released, the parallel connected auxiliary contacts gets closed and the circuit operation continues.
Thus, the switch is of normally open type.
Want to see more full solutions like this?
Chapter 28 Solutions
Industrial Motor Control
- 4. Describe two type of starting system principles and draw the basic starting circuitarrow_forwardWhen programming in Boolean, what statement should be used to connect components in series?arrow_forwardThe type of spindle unit shown in figure is: Air or liquid cooling Select one: Release mechanism Tool clamp Motor Belt drive Gearbox drive O Coupled drive Coupling Spindle None of the above Direct drivearrow_forward
- What is system?arrow_forwardFor a given frame size, a three phase machines gives a higher output than a single phase machine. Select one: True Falsearrow_forward1. In the drilling process shown in Figure 1, there are three cylinders in which cylinders A and B are used to clamp the work piece and Drill cylinder is used to lower and raise the drill. The sequence of operation is as follows: activate the direction control valve to start the process, Cylinder A and Cylinder B clamps the workpiece and then activate the second directional control valve to drill cylinder lowers the drill and raises afterwards. Once the drill is raised, cylinder A and cylinder B retracts. sensors Drill-high Drill Drill-Low Part / Material Cylinder A Cylinder B A+ B+ sensors Figure 1: Drilling Process а) Design the Hydraulic Circuit with proper labeling. Include the allocation list and the components required b) Draw the functional diagram/step diagramarrow_forward
- Electro-pneumatics Sequential Circuit Problem: Initial position all cylinder are retracted. Pressing the start pushbutton makes 5 cycles. After making 5 cycles lamp is energized for 3 secs. Cycle Operation: Cylinder A extend and hold the work piece. Cylinder B extend for 5 secs. Then retract. Cylinder A retract.arrow_forwardWhat is an ATC?arrow_forwardWhat is a couplingarrow_forward
- Understanding Motor ControlsMechanical EngineeringISBN:9781337798686Author:Stephen L. HermanPublisher:Delmar Cengage LearningPrecision Machining Technology (MindTap Course Li...Mechanical EngineeringISBN:9781285444543Author:Peter J. Hoffman, Eric S. Hopewell, Brian JanesPublisher:Cengage Learning