EBK 3N3-EBK: INDUSTRIAL MOTOR CONTROL
7th Edition
ISBN: 9780176919962
Author: Herman
Publisher: VST
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Textbook Question
Chapter 19, Problem 1RQ
Define a schematic diagram.
Expert Solution & Answer
To determine
The definition for the schematic diagram.
Explanation of Solution
The diagram is one that shows the necessary significant contacts of the circuit with the flow of operation of the circuit. The schematic diagram is made by the standard symbols.
The other names for the schematic diagram is the ladder or the line diagram. The electrical schematic diagram shows the electrical sequence of the without specifying the physical location.
The schematic diagram fix the control circuit or is helpful in the troubleshooting in the control circuit.
The maintenance electrician should be aware of the schematic diagram so that the electrical can perform the maintenance or trouble shooting operation,.
Thus, the schematic diagram is explained.
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2: A wire 4 meters long is stretched horizontally between points 4 meters apart. The wire is 25 mm2 in cross-section with a modulus of elasticity of 200 GPa. A load W placed at the center of the wire produces a sag Δ.1.Calculate the tension (N) in the wire if sag Δ = 30 mm.2.Calculate the magnitude of W, in N, if sag Δ = 54.3 mm.3. If W is 60 N, what is the sag (in mm)?ANSWERS: (1) 562 N, (2) 100 N, (3) 45.8 N
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4 : A cable and pulley system at D is used to bring a 230-kg pole (ACB) to a vertical position as shown. The cable has tensile force T and is attached at C. The length of the pole is 6.0 m, the outer diameter is d = 140 mm, and the wall thickness t = 12 mm. The pole pivots about a pin at A. The allowable shear stress in the pin is 60 MPa and the allowable bearing stress is 90 MPa. The diameter of the cable is 8 mm.1.Find the minimum diameter (mm) of the pin at A to support the weight of the pole in the position shown.2.Calculate the elongation (mm) of the cable CD.3.Calculate the vertical displacement of point C, in mm.ANSWERS: (1) 6 mm, (2) 1.186 mm, (3) 1.337 mm--
Chapter 19 Solutions
EBK 3N3-EBK: INDUSTRIAL MOTOR CONTROL
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