Compressor false interlock issue
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The reason for the two consecutive shutdowns of compressor ES5200 was the same: low inlet pressure of the compressor (indicated by the industrial computer’s alarm record: PT-703B (inlet pressure) ≤ 1.0 Kpa). However, both the historical pressure records for the inlet pressure of compressor ES5200 and the pressure in the gas tank were above 1.2 Kpa； Could it be that a high-pressure transmitter suddenly becomes distorted and then returns to its normal state? ?
You can use a two-out-of-two or three-out-of-two approach, etc., to avoid misoperations
The answer above is correct; it’s also possible to set a delay, but this feature isn’t used very often
Which company has used delay mechanisms to address issues related to incorrect interlocks?
Could moderator zhouhuihubei provide some relevant information? ? ? I kneel in gratitude! ! !
Reply 5# pupu123: The import low-pressure self-protection interlock triggers a shutdown. Personal opinion: The main reason for the shutdown was a deviation between the import pressure and the actual parameters of the interlock, which triggered the interlock to shut down the system. Action: Shut down the machine to recalibrate the inlet pressure interlock.
A pressure as low as 1.0 Kpa may indicate a leak; check the connections
Interlock systems usually use a three-out-of-two configuration, as this provides greater reliability. I’ve encountered this situation as well: the readings did not reach the set threshold, yet the compressor stopped running anyway
Is the location of the pressure measurement point for sequential shutdowns the same as that of the pressure curve’s measurement point? Is there a difference in the sampling interval between the two? It’s likely that there were indeed points where the pressure was low
Changing it to 2002 is still acceptable; 2003 is too costly； Also, it is very important to determine whether the pressure sampling points mentioned above are all in the same location; there might be cases where the locations of these sampling points are not suitable. I have encountered malfunctions caused by problems with the pressure sampling points on site
At a pressure of 1.0 Kpa, high precision is required; it is necessary to inspect and calibrate both the on-site and remote transmitters, as well as check the location of the sampling points to ensure there is no oil or water present and that there are no blockages. A three-out-of-two configuration provides relatively higher accuracy. It has also happened to our device.