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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




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