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Click on the the image that has 9 cycles and click the “Check” button.
Count the peaks in each image and then select the correct answer.
Click on the the image that has 10 cycles and click the “Check” button.
Count the peaks in each image and then select the correct answer.
Is this an ABC or ACB 3phase system?
Pretend the waveforms are scrolling from right to left. In what order will the phases cross the yaxis?
Is this an ABC or ACB 3phase system?
Pretend the waveforms are scrolling from right to left. In what order will the phases cross the yaxis?
You have performed two timing tests to to find out what reference the testset’s cycle timer uses.
Use the following formulas and your calculator to figure out what reference the testset uses to count cycles?
You want to find out what reference the relay’s cycle timer uses and perform two timing tests.
Use the following formulas and your calculator to figure out what reference the relay uses to count cycles?
Use the following formulas and your calculator to figure out the expected timetotrip in seconds if the relay uses the Nominal System Frequency as a reference? (Enter 3 decimal places, for example 1.234)
Nominal System Frequency [NSF] = 50 Hz
Relay Setting (Cycles) = 10 cycles
Relay Reference = NSF
TestSet Reference = NSF
Generated Frequency (Hz) [GF] = 56.3 Hz
Use the correct formula and the Nominal System Frequency to calculate the answer.
Use the following formulas and your calculator to figure out the expected timetotrip in cycles if the relay uses the Generated Frequency as its reference and your testset uses the Nominal System Frequency as its reference? (Enter 3 decimal places, for example 1.234)
Nominal System Frequency [NSF] = 50 Hz
Relay Setting (Cycles) = 45 cycles
Relay Reference = GF
TestSet Reference = NSF
Generated Frequency (Hz) [GF] = 47.3 Hz
Use the correct formula and the Generated Frequency to calculate the answer in seconds. Then use the correct formula and Nominal System Frequency to convert seconds to cycles.
Use the following formulas and your calculator to figure out the expected timetotrip in seconds if the relay uses the Generated Frequency as its reference? (Enter 3 decimal places, for example 1.234)
Nominal System Frequency [NSF] = 60 Hz
Relay Setting (Cycles) = 1800 cycles
Relay Reference = GF
TestSet Reference = GF
Generated Frequency (Hz) [GF] = 61.6 Hz
Use the correct formula and the Generated Frequency to calculate the answer. Submit your answer with 3 decimal places.
Use the following formulas and your calculator to figure out the expected timetotrip in seconds if the relay uses the Generated Frequency as its reference? (Enter 3 decimal places, for example 1.234)
Nominal System Frequency [NSF] = 50 Hz
Relay Setting (Cycles) = 1800 cycles
Relay Reference = GF
TestSet Reference = GF
Generated Frequency (Hz) [GF] = 51.6 Hz
Use the correct formula and the Generated Frequency to calculate the answer. Submit your answer with 3 decimal places.
Use the following formulas and your calculator to figure out the expected timetotrip in seconds if the relay uses the Nominal System Frequency as a reference? (Enter 3 decimal places, for example 1.234)
Nominal System Frequency [NSF] = 60 Hz
Relay Setting (Cycles) = 45 cycles
Relay Reference = NSF
TestSet Reference = NSF
Generated Frequency (Hz) [GF] = 57.3 Hz
Use the correct formula and the Nominal System Frequency to calculate the answer.
Use the following formulas and your calculator to figure out the expected timetotrip in cycles if the relay uses the Nominal System Frequency as its reference and your testset uses the Generated Frequency as its reference? (Enter 3 decimal places, for example 1.234)
Nominal System Frequency [NSF] = 60 Hz
Relay Setting (Cycles) = 600 cycles
Relay Reference = NSF
TestSet Reference = GF
Generated Frequency (Hz) [GF] = 61.7 Hz
Use the correct formula and the Nominal System Frequency to calculate the answer in seconds. Then use the correct formula and Generated Frequency to convert seconds to cycles. Submit your answer with 3 decimal places.