Overcurrent relay - Study guides, Study notes & Summaries

Providing a path to earth often helps reduce electro static charge. True Lightning frequently terminates to a point of elevation and strikes non-metallic as well as metallic objects with the same frequency. True The termination of the lightning strike is unlikely to ignite combustible materials. False Lightning protection is intended to protect the building itself as well as the electrical equipment on or inside the structure. False Non-magnetic metals are ferrous...

Q32618 When a high voltage transmission line circuit breaker trips open as a result of a fault, a synchronous check relay will monitor certain values on both the line side and the bus side of the open circuit breaker. Before the synchronous check relay re-closes the open circuit breaker, which of the following values has to be within a certain limit before the circuit breaker will close automatically? •) Frequency •) Voltage Magnitudes •) Phase Angle between the voltages •) A...

The Reliability Coordinator just informed you of a slow time error correction which will begin at the top of the next hour. Your EMS system will not let you change your scheduled frequency. Your Frequency Bias Setting is -100 MW/.1Hz. What action should you take? A) Increase Net Interchange Schedule by 20 MWs. B) Inform the Reliability Coordinator that you cannot participate in the time error correction. C) Decrease Net Interchange Schedule by 20 MWs. D) Increase Net Interchange Sche...

A fuse is used in an electrical circuit to correct answers Protect the circuit wires from an overcurrent condition How are fuses rated correct answers In amps with a maximum voltage rating What will an ohmmeter measure when testing an open fuse correct answers Infinite resistance What type of sensing element is commonly found in fan and limit controls correct answers Bimetal What is used to sense space temperature in electronic temperature controls correct answers Thermistors What...

Which article of the NEC covers grounding? Article 250 What is a dropout plate? Metal plate with a curve surface for cable to follow as it passes from the tray All of the following are common service voltages in the United States Except: 372/575 3- Phase, 4-wire What does a GFCI breaker do? Opens a circuit to prevent operation of an electrical device What will happen when one or more coils in a winding are grounded? The motor will automatically blow fuses eight incandescent lighting fix...

If a Balancing Authority does not comply with the Control Performance Standard, the Balancing Authority is not permitted to provide which of the following for any other Balancing Authority entities? Regulation of other services related to control performance 1. It is the obligation of each Balancing Authority to fulfill its commitment to the Interconnection and not ________ the other balancing Authorities in the Interconnection Burden A Balancing Authority is performing Overlap Regul...

Receiving job instruction and planning equipment use are part of: a. craft data. b. job preparation. c. work factors. d. leveled time. - Answer b. job preparation Anticipating other tasks or problems: a. usually creates additional problems. b. wastes time. c. sharply reduces the number of emergencies. d. often is not worth the effort. - Answer c sharply reduces the number of emergencies Making job planning a group effort: a. wastes time. b. improves productivity. c. causes c...

1. What is the minimum working clearance from an electrical panel under 600 V?CORRECT ANSWER: 36" 2. Voltage drop in wire is a function of: CORRECT ANSWER: Wire gauge, Length of wire, Current flow in the wire 3. A 12-volt direct current, 13-watt fluorescent light is controlled by a photocell. The average daily on-time is 12 hours per day. How many watt-hours are consumed by the light on an average day?: CORRECT ANSWER 156 4. Where may you use nonmetallic-sheathed cable?: CORRECT ANSWER insid...

5/1 NFPA70E Final: NFPA 70E - ELECTRICAL SAFETY TRAINING Exam_2023. NFPA 70E, Standard for Electrical Safety in the Workplace, consists of ? chapters; 17 informative annexes; the Foreword to NFPA 70E; and Article 90, Introduction. Chapter 1 is divided into ? articles. The appointment of the NFPA 70E Committee was announced on January 7, ? , and was formed to assist ? in preparing electrical safety standards that would serve its requirements. The 1995 edition of NFPA 70E included the con...

NCCER Electrical Exam Q&A with Complete Solution Which Article of the NEC covers grounding? - article 250 Which of the following is a 90 degree, explosion proof fitting? - GUAL What is a dropout plate? - Metal plate with a curved surface for cable to follow as it passes from the tray All of the following are common service voltages in the United States EXCEPT: - 372/575 3-PHASE, 4-WIRE What does a GFCI breaker do? - Opens a circuit to prevent operation of an electrical device W...