After the plant power supply is restored, the motor current in the DCS system is low
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This post was last edited by Geese flying over the blue sky on 2022-6-13 at 12:44. It is a waste heat power plant belonging to a cement factory; one day, the national power supply was interrupted, which led to a disruption in the power supply for this waste heat power plant A call came in half an hour later; the currents of the feed water pump, the fan condensate pump, and the circulation pump were all lower than usual, by about 7A. It’s been half a month now – I don’t know what the reason is Some pumps are working properly
If the current has decreased, then it’s necessary to check whether the voltage increased after a power outage and then the power was restored.
Check the voltage of the pump with reduced current and compare it with that of the pump having normal current; if they are not on the same transformer, check whether the transformer is faulty
There is only one station transformer, and the voltage remains the same. Motors with higher power experience a greater drop in current, while those with lower power experience a smaller drop
First, check in the distribution cabinet whether the motor current matches what the DCS can handle
Low motor current in the DCS system? How should this be understood? Is the current shown on the DCS low? Is the current still low as shown on the distribution cabinet?
Does the DCS have a backup power supply? Could it be that after the range was modified online, the DCS lost power and was reset?