Overcurrent relay - Study guides, Study notes & Summaries

NERC Prep - Bal, Int, & Trans Exam Questions and Answers Graded A+. What group can approve a change in the Disturbance Recovery Period for an Interconnection? a. NERC Interconnection Working Group b. NERC Operating Committee c. NERC Regional Council d. NERC Disturbance Analysis Working Group c. Check targets and equipment - What is the first thing an operator should do after a relay operation? a. Check power system stabilizers b. Notify adjacent Transmission and Balancing areas c. Che...

Which of the following is true with regard to switchboards Switchboards are used to subdivide large blocks of power When installing wiring within switchgear, use self adhesive cable ties every ___. 12" (300mm) The maximum voltage that a piece of equipment can withstand is known as its ____. Basic impulse insulation level (BIL) Bolted pressure switches are often used in place of ___. Circuit breakers A transformer's temperature rise rating refers to ___. The max...

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? CORRECT ANSWER •) Frequency •) Voltage Magnitudes •) Phase Angle between the voltages ...

CSLB C10 Test 1 | 120 Questions with 100%Correct Answers Already Passed. What is the minimum working clearance from an electrical panel under 600 V? 36" Voltage drop in wire is a function of: Wire gauge, Length of wire, Current flow in the wire 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? 156 Where may you use nonmetallic-sheathed cable? i...

CSLB C10 Test 1 | 120 Questions with 100%Correct Answers Already Passed. What is the minimum working clearance from an electrical panel under 600 V? 36" Voltage drop in wire is a function of: Wire gauge, Length of wire, Current flow in the wire 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? 156 Where may you use nonmetallic-sheathed cable? i...

The weight of water vapor in a given amount of air (Grains per cubic foot) - Answer-Absolute Humidity Pressure measured with a base of zero - Answer-Absolute Pressure A temperature scale using absolute zero as a reference - Rankin or Kelvin Scale (may be measures in degrees C or F) - Answer-Absolute Temperature Theoretical temperature at which all molecular activity ceases = -273.16 C or -456.69 F - AnswerAbsolute Zero By approximately how much (%) does a start capacitor increase motor tor...

NERC Prep Exam Questions and Answers Latest Graded A+. What Energy Alert Level would the following example be categorized as? "A Balancing Authority, Reserve Sharing Group, or Load Serving Entity foresees, or is experiencing conditions where all available resources are committed to meet firm load, firm transactions, etc, and requests an Energy Emergency Alert." NERC Prep - Bal, Int, & Trans Exam Questions and Answers Graded A+ a. Energy Emergency Alert Level IV b. Energy Emergency Al...

XC - ANSWER-______ is the letter(s) used to indicate capacitive reactance in a circuit. A) XL, B) Z, C) HZ, D) XC Conductors drawn from a copper-clad aluminum rod with the copper metallurgically bonded to an aluminum core. The copper forms a minimum of ________ percent of the csa. - ANSWER-10 Relay contacts are made of ___________. - ANSWER-Silver Defined apparatus - ANSWER-The organization or system used for doing or operating something Operation of equipment in excess of normal,...

What components are designed to provide excessive or over-current protection? Fuses and Circuit Breakers What device provides a delayed trip due to excessive or overcurrent condition? Thermal Overload What are the functions of a circuit breaker? Opens the circuit for isolation during maintenance or troubleshooting and trips the circuit under an over-current condition. What is the difference between a relay and a contactor? -Contactors switch higher currents -Relay switch lowe...

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? - Answer- •) Frequency •) Voltage Magnitudes •) Phase Angle between the voltages •) ...