Frequency Abnormal

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A major fault indicating that the actual frequency of the connected power grid is outside the required range for the local grid. This can prevent the SUN2000 from synchronizing and feeding power, leading to shutdown.

• The actual frequency of the grid is higher than or lower than the required value for the local grid.
• An accidental grid abnormality.

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1. 1

   Observe if the SUN2000 automatically reverts to normal operating status if the alarm occurred accidentally due to a temporary grid abnormality.

2. 2

   If the alarm occurs repeatedly, check if the grid frequency is within the allowed range.

3. 3

   If the grid frequency is within the allowed range but alarms persist, change the grid overfrequency and underfrequency protection points after obtaining approval from the local power operator (refer to 7.2.9 Setting Protection Parameters).