Thermal tripping - Study guides, Class notes & Summaries

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...

You are an external BA with a frequency bais of 20 MW/.1 Hz that sees a frequency of 60.02 due to a large loss of load in the contingent BA. If your generator governor control systems responded to the frequency deviation approximately how much of a generation change would you BA experience? -4MW Net actual interchange minus Net scheduled interchange is what? Inadvertent interchange Suppose your interconnection operators at 59.97 Hz from one minute after midnight to noon and operate a...

Ewrb Theory Prep – Mcbs Questions With Correct Detailed Answers

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...