The fan’s starting current is too high, causing it to trip. The pipeline configuration is as shown; the inlet and outlet diameters are both 150. Could someone please analyze what might be the cause?
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The fan’s starting current is too high, causing it to trip. The pipeline configuration is as shown; the inlet and outlet diameters are both 150. Could someone please analyze what might be the cause?
At startup, don’t open the outlet fully right away; open it slowly, as holding it closed can create pressure
After it’s started, maybe the design is too small
It couldn’t be started using the original pipeline, so then Figure 3 was used
1. Open the outlet valve fully, close the inlet valve, and start. 2 Slowly open the inlet valve. 3 If the current is high, check whether the position of the inlet valve matches the actual value.
Check from both operational and electrical aspects. In terms of operation, it is necessary to strictly follow the operating procedures. 1. Before starting, open the outlet valve fully and close the inlet valve, then start the operation. 2. Slowly open the inlet valve. 3. Check whether the position of the inlet valve matches the actual value. Check from an electrical perspective: 1. Whether it is single-phase current. 2. Disconnect the ammeter and check whether the on-site reading matches the actual value.
If it starts properly in the open position (Figure 3), it indicates that the negative pressure before the inlet is too high, which may cause items in the intake pipeline, including the valves, to be in a fully closed state There are problems. It is necessary to check whether the inhalation tubing is unobstructed. Could excessive negative pressure cause excessive axial force, which in turn leads to high current? ? ? For reference.
Check the switch settings in the power distribution room to see if they are correct. We’ve encountered similar problems here before; after the electrical team changed over, it was found that the trip current setting for one fan was 7 times the normal current value. It was adjusted to 5 times the normal value, but no one was informed of this change. As a result, the fan kept tripping whenever it was turned on, causing a lot of frustration. Eventually, their supervisor identified the problem... One successful startup: 1
Thank you. Can the normal pressure holding capacity reach the full pressure indicated on the nameplate? Could an expert please give some advice?
Starting the system using the original piping design causes an overcurrent trip; however, normal operation is achieved once the inlet piping is disconnected. I would like to know whether the issue lies with the fan or the piping. Based on your experience, what is an appropriate pressure drop for a 150 mm diameter piping system? The piping setup includes an inlet with a DN150 control valve and butterfly valve, a buffer tank, a 6–8 meter long DN150 pipeline, a tee, another 150 mm butterfly valve, as well as reducers and bellows
After disconnecting all the inlet pipelines, operate it as shown in Figure 3. Please help analyze this