5. An automatic switch or cutout is allowed in the equipment grounding conductor circuit when A. there's a redundant equipment grounding conductor in the circuit. B. the power sources are disconnected when operated. C. it's bonded around the disconnecting device. D. it also opens the neutral.
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- What Transient Voltage appears across the Circuit Breaker contacts at, or near Current Zero during the Arcing Period? O A. Restriking Voltage O B. Critical Disruptive Voltage O C. Arc Voltage O D. Recovery VoltageA. Discuss the arcing phenomenon in a circuit breaker. B. Discuss the types of oil circuit breakers. With referencesPlease help with the following questions, thank you. Calculate the following : 1) At what voltage is the switching point? 2) The hysteresis spread ?
- What is circuit breaker?3) 94 select the proper answer for the following: 1) The main processes that have the responsibility of arc initiation in the switching of the high voltage power system are: a) the field and thermal emissions b) the deionization of the arc path c) the photoionization and magnetic field emission 2) The dead tank term is used with: a) Bulk oil circuit breaker b) Minimum oil circuit breaker c) Air blast circuit breaker 3) The errors in the PTs can be minimized by: a) By providing a suitable turn ratio b) By increasing the winding resistance and reactance 24. Disconnect the DC power supply, and then measured the equivalent resistance by using the AVO meter only.
- Lockout is required: During servicing and maintenance where unexpected ener- gization or start-up of equipment could harm employees. During repair and replacement work, and during renovation work. a. b. C. During modifications or other adjustments to powered equipment. d. All of the above. Lockout may involve: Opening a disconnect switch. b. a. Closing a valve. Placing a block in the equipment. d. All of the above. C. Lockout is the process ci Shutting off a machine at the end of a shift. Warning equipment operators about the risks involved in bypassing a machine guard. Preventing the flow of energy from a power source to a piece of equipment, and keeping it from operating. a. b. C. d. Preventing mechanics from starting repairs without the machine operators' knowledge. Tagout: Serves as a warning. b. Physically restrains a person from operating a power source. Must be applied using specialized tagout tools. a. C. d. Must be worn like a badge by the employee who is doing the repairs.…Explain the concept of a circuit breaker in electrical power systems and its role in protecting against overcurrent faults.2. What fault occurs when Line and Neutral wires come with each other? Which device is actuated?
- What Transient Voltage appears across the Circuit Breaker contacts at, or near Current Zero during the Arcing Period? O A. Arc Voltage O B. Recovery Voltage O C. Restriking Voltage O D. Critical Disruptive Voltage Co searchMultiple choices cont.: c. The 3M load contacts are welded shut. d. The normally open 3M contact between wire numbers 23 and 31 is hung closed.12. If overcurrent protection is provided in the transformer of a separately derived system, which of the following statements is correct?A. A ground electrode must be present at the transformer and the building's disconnect.B. There's no need for service equipment or a panelboard in the separate building.C. An equipment grounding conductor must be run with the conductors between the transformer and the building's disconnect.D. The neutral should be bonded to the equipment grounding conductor at the service equipment in the separate building.