Solar Lattice

Measurement

DC input overcurrent event

ID
meas:dc-input-overcurrent-event
IRI
https://solarlattice.org/kb/meas/dc-input-overcurrent-event
Status
active
Also known as
Overcurrent at the DC input, DC overcurrent

This signature is an inverter event that reports overcurrent on the DC input side, coming from the PV array. If the message comes up often, check that the PV array is rated and wired correctly. The related events 3801 and 3802 report DC overcurrent too. For these, check the PV array and look for ground faults in the PV system. During inspection, check the DC overcurrent protection: string or array protective devices must be fitted and correctly specified, and string cables must be sized for the combined fault current from parallel strings.

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Signals

Monitoring channels where this signature appears, named by SunSpec model point.

PointUnitPattern
model_160.DCAAinput current on the affected PV input reaches the inverter's overcurrent limit just before the event
model_103.WWAC output briefly drops to zero while feed-in is interrupted, then resumes

Referenced by

Data