Concept explainers
In the event of line voltage fluctuations or failure, how is the starter maintained in a closed position?
Explain how the starter is maintained in a closed position during the event of line voltage fluctuations or failure.
Explanation of Solution
If the time is delayed, low-voltage release relay device is used with the magnetic starter and a momentary contact push button station; the motor can automatically reconnect with the power lines after a voltage failure or voltage fluctuations of short duration.
Refer to Figure 24-2 in the textbook, the electrolytic capacitor represented as C1 is charged through the rectifier. If the line voltage fluctuates or fails completely, the electrolytic capacitor can discharge through the control relay to maintain the coil as energized through which the starter can be maintained in a closed position. The discharging time required by the capacitor is a function of resistance in the circuit and capacitance of the device.
Conclusion:
Thus, the process of a starter maintained in a closed position during the event of line voltage fluctuations or failure is explained.
Want to see more full solutions like this?
- In the context of power system protection, what are the various types of relays and their functions in detecting faults and ensuring system safety?arrow_forwardWhat are typical uses for control relaysarrow_forwardExplain the operation and significance of protective relays in power systems. How do they help prevent faults and blackouts?arrow_forward
- WHAT ARE THE DIFFERENT TYPE OF SWITCHES, RELAY AND CONTACTORS?arrow_forwardWhat are the different types of faults in power systems, and how are protective relays used to detect and mitigate these faults?arrow_forwardWrite an introduction about Relays Your introduction should include the following points: A-What is the Relay B- Relay schematic symbol and pin configuration C-Applications of the Relaysarrow_forward
- Electricity for Refrigeration, Heating, and Air C...Mechanical EngineeringISBN:9781337399128Author:Russell E. SmithPublisher:Cengage Learning