Tutorial > Programming AC Output > Current Limit

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Programming AC Output

AC Voltage and Frequency | Current Limit

Current Limit

The PCR-M has a programmable current limit function for its RMS limit value and type of current limit operation.

 

:CURRent 5.2

:CURRent:PROTection:STATe 0

 

If the load attempts to draw more RMS current than the programmed limit or draw more PEAK current than the system-defined PEAK limit, the output voltage is reduced to keep the RMS or PEAK current within the limits.

The response of the current detection feature is not instantaneous. Whenever an RMS current or a PEAK current that exceeds the given limit value is detected, the PCR-M raises an OVERLOAD warning, and then sets the CL-rms bit (bit 12) or CL-pk bit (bit 10) on the STATus:QUEStionable register.

There are two behaviours for current limiting - Limit Control and Trip. When Limit Control is selected (CURRent:PROTection:STATe is 0), the voltage output retains the reduced state without tripping the output. When Trip is selected (CURRent:PROTection:STAT is 1), the output is tripped when the voltage reduction continues for a given period.