Thermal tripping - Study guides, Class notes & Summaries

Which type of relay operates on the premise of comparing the flow in and out of the area of protection? correct answers Differential relay Underfrequency load shedding is set-up so that which of the following does NOT occur? correct answers Uncontrolled separation Who is responsible to make sure that the operation of voltage control equipment is coordinated with other impacted entities? correct answers Transmission Operator The coordination of voltage schedules by system operators would...

NERC PREP TEST 101 | questions and answers 2023/24 GRADED A+ 1. If a 500 kV transmission line with a surge impedance loading of 800 MW is currently loaded at 1400 MW, which of the following events would most likely occur? a. Generator MVAR output would increase b. All system capacitors would trip off-line c. Generator MVAR output would decrease d. All automatic reactors would connect to the system - a. Generator MVAR output would increase 2. When system conditions are such that em...

NERC Transmission Practice Test Questions and Correct Answers Which type of relay operates on the premise of comparing the flow in and out of the area of protection? - Correct Answer: Differential relay Underfrequency load shedding is set-up so that which of the following does NOT occur? - Correct Answer: Uncontrolled separation Who is responsible to make sure that the operation of voltage control equipment is coordinated with other impacted entities? - Correct Answer: Transmission Oper...

A transmission line is operating with a voltage phase angle different of 30 degrees between the sending Vs and the receiving bus Vr. If the receiving end load is suddenly increased, the voltage phase angle difference will be? The phase angle will increase. When load is increased phase angle will increase. A load has a power factor of 0.9 lagging. If the load draws 100 MVA, what is the MW draw? 90 pf= mw/mva The high side of a delta-wye connection transformer is connected to a power s...

Accelerating Power In a GENERATOR, the difference between the MECHANICAL INPUT POWER and the electrical output POWER (assuming no LOSSES). For a GENERATOR's TORQUE ANGLE to change, the GENERATOR must have accelerating POWER. Accumulated Inadvertent The accumulation over time of INADVERTENT ENERGY. The accumulated inadvertent account of a BALANCING AUTHORITY represents the amount of excess ENERGY a BALANCING AUTHORITY has either supplied to the INTERCONNECTION or absorbed from the INTER...

Accelerating Power - In a GENERATOR, the difference between the MECHANICAL INPUT POWER and the electrical output POWER (assuming no LOSSES). For a GENERATOR's TORQUE ANGLE to change, the GENERATOR must have accelerating POWER. Accumulated Inadvertent - The accumulation over time of INADVERTENT ENERGY. The accumulated inadvertent account of a BALANCING AUTHORITY represents the amount of excess ENERGY a BALANCING AUTHORITY has either supplied to the INTERCONNECTION or absorbed from the I...

_______ can be generated. I. Electricity II. Electrical Energy a. I only b. II only c. both I and II d. neither I nor II Ans. b A phenomenon where a circuit stores electrical energy is called ______. a. Inductance b. Capacitance c. Resistance d. Susceptance Ans. b Brainpower Read More A general term including material, fittings, devices, appliances, fixtures, apparatus, and the like used as part of, or in connection with, an electrical installation is ______. a. pre...

Journeyman Exam 1 & 2 Questions and Answers _______ can be generated. I. Electricity II. Electrical Energy a. I only b. II only c. both I and II d. neither I nor II -Answer-Ans. b A phenomenon where a circuit stores electrical energy is called ______. a. Inductance b. Capacitance c. Resistance d. Susceptance -Answer-Ans. b A general term including material, fittings, devices, appliances, fixtures, apparatus, and the like used as part of, or in connection with, an electrical installa...

NERC PREP TEST 101- QUESTIONS & ANS 1. If a 500 kV transmission line with a surge impedance loading of 800 MW is currently loaded at 1400 MW, which of the following events would most likely occur? a. Generator MVAR output would increase b. All system capacitors would trip off-line c. Generator MVAR output would decrease d. All automatic reactors would connect to the system a. Generator MVAR output would increase . When system conditions are such that emergency procedur...

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...