ATM90E32AS-AU-R datasheet(17/84 Pages) ATMEL

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M90E32AS [DATASHEET]

Atmel-46003B-SE-M90E32AS-Datasheet_02122015

3.6.5

PHASE ANGLE

Phase Angle measurement registers can be divided as below:

phase A / phase B / phase C

voltage / current

Altogether there are 6 phase angle registers. Refer to 5.6.3 Peak, Frequency, Angle and Temperature Registers.

Phase Angle is measured by the time-difference between the Voltage and Current channel of the same phase.

3.6.6

FREQUENCY

The frequency is measured basing on the zero-crossing point of voltage channels.

The phase A voltage signal zero-crossing will be used to compute the frequency. If phase A is in the SAG condition, phase

C will be used. If phase C is also in SAG condition, phase B will be used.

If all the phases are in the SAG condition, Frequency will be measured based on the channels which are not in phaseLoss

condition (with the same order). If all phases are lost, the frequency will return zero.

The frequency data is not averaged (updated cycle by cycle).

Refer to 5.6.3 Peak, Frequency, Angle and Temperature Registers.

3.6.7

TEMPERATURE

Chip Junction-Temperature is measured roughly every 100 ms by on-chip temperature sensor.

Refer to 5.6.3 Peak, Frequency, Angle and Temperature Registers.

3.6.8

PEAK VALUE

Altogether there are 6 peak value registers. Refer to 5.6.3 Peak, Frequency, Angle and Temperature Registers.

Refer to 3.7.1 Instantaneous Signal Monitoring.

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