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Google invbat.com/determinant
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Demonstration on how to use your smartphone as your formula and calculator tool


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INVBAT.COM is helping students, teachers, and employees to create their own interactive formula website that works with their smartphone, tablet, laptop or desktop computer. INVBAT.COM making formula and calculator easy to find, easy to use, and available on demand 24/7, anytime and anywhere using internet and smartphone.

Understanding Sampling Rate
For Power System Protection

SEL RELAY EVENT REPORT SETTING FOR SAMPLING RATE IS: 4 SAMPLES / CYCLE


WHAT IS THE EQUIVALENT OF 4 SAMPLES / CYCLE TO SAMPLES / SECOND?


SEL RELAY EVENT REPORT OPTIONAL SETTING IS 16 SAMPLES / CYLCE. HOW MANY SAMPLES IN POSITVE CYCLE AND HOW MANY SAMPLES IN NEGATIVE CYCLE .


WHAT IS THE EQUIVALENT OF 16 SAMPLES / CYCLE TO SAMPLES / SECOND?

EXERCISES:

A BUSHING MONITOR TECHNICAL SPECIFICATION IS 180,000 SAMPLES / SECOND. WHAT IS THE SAMPLING RATE IN SAMPLES / CYCLE.

A PARTIAL DISCHARGE MONITOR TECHNICAL SPECIFICATION IS 1,000,000 SAMPLES / SECOND. WHAT IS THE SAMPLING RATE IN SAMPLES / CYCLE.

EASY TO USE: CLICK ANY WHITE BUTTON. NEXT ENTER NEW NUMBER

Assume voltage or current waveform frequency = 60 cycles/sec or 60 Hz

cycle = millisecond


° degree = milliseconds


° degree = cycle


Assume voltage or current waveform frequency = 50 cycles/sec or 50 Hz

cycle = millisecond


° degree = millisecond


° degree = cycle




Reference frequency is 100,000 Hz or 100 kHz

cycle = microsecond
10 microsecond = 10µsec = 10 x 10-6 second =10 e-6 second = 0.000010 sec


Reference frequency is 50 MHz

cycle = nanosecond
20 nanosecond = 20 nsec = 20 x 10-9 second =20 e-9 second = 0.000000020 sec


For 60 Hz

1 cycle * sec /60 cycles = 0.0166667 seconds = 16.667 milliseconds


360 electrical degree = 1 cycle

1 ° degree = 1/360 cycle = 0.002778 cycle


For 50 Hz

1 cycle * sec /50 cycles = 0.02 seconds = 20 milliseconds


Angular Degree to Radian Calculator

radian = degree