The current when testing the new pump is low, causing it to trip frequently
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When testing a new pump, the current is low and it trips frequently; what are the reasons for this low load?
There is an explanation in this link: http://bbs.hcbbs.com/thread-352745-1-1.html
1. First, it is necessary to determine whether the pump and motor have been selected with too large a capacity; in that case, the rated flow rate cannot be achieved, and the motor will not reach its rated current, resulting in a lower value. 2. Problems with the pump’s outlet pipeline result in a low flow rate, and the current level will also be low. Flow rate and current are related to each other: the greater the flow rate, the more work the motor does, and the higher the current becomes. 3. The ammeter itself is damaged, resulting in a low reading.
I believe the reasons for the pump starting up with a low current when tested are as follows: 1. The current reading is too low, although the actual current has already exceeded the motor’s rated value; 2. The quality of the motor manufacturing is poor; 3. The quality of the electrical protection components is inadequate
Another reason is that the flow rate also varies due to differences in the density of the medium