Concept explainers
Explain why contactors are described as control pilot devices and large magnetic switches.
Explanation of Solution
Discussion:
Contactors are electromagnetic switches that are very convenient for interrupting and connecting the branch circuits based on the range or size of contractors.
Contactors with a combination of pilot devices are used to control AC motors, switch lightning, and heavy loads.
Small range contactors with a combination of control devices are used for larger controls. Large contactors can control the heavy currents where overload protection is provided separately. Relays might be used to control the large contactors.
Conclusion:
Thus, the reason why contactors are described as control pilot devices and large magnetic switches is explained.
Want to see more full solutions like this?
Chapter 8 Solutions
Electric Motor Control
- What are some applications of temperature-actuated switches?arrow_forwardHow many wires are required for a two-wire control device?arrow_forwardConvert the control circuit only, Figure 2111, from the wiring diagram to an elementary diagram. Include the limit switches (RLS, FLS) as operating in the control circuit.arrow_forward
Electricity for Refrigeration, Heating, and Air C...Mechanical EngineeringISBN:9781337399128Author:Russell E. SmithPublisher:Cengage Learning