Several questions regarding the unsuccessful commissioning of screw compressors
Thread Content
Today, our company conducted tests on the screw compressor; we tried it three or four times, and each time it stopped running after a few dozen seconds of operation. The reason given was automatic protection due to overcurrent. The leadership is still discussing various reasons, and no specific solutions have been identified yet. There are several reasons for the initial judgment: first, the import opening was too large, and it was reduced by two-thirds in the last attempt; second, the soft water was added too early, right at the moment of startup. Third is motor overload, with a possibility of a small engine being used to drive a heavy load. Fourth, the coupling is not properly connected. I kindly ask the expert friends to provide a detailed answer.
Let me put it this way: it’s good news that the transformer used throughout the factory didn’t trip when it wasn’t in operation. High-voltage transformer, low-voltage transformer. If I remember correctly, it’s a problem with the opening degree of the inlet or outlet valve.
The reasons for the excessive import opening have already been taken into account.
What type of medium compressor is it? Does it have a bypass? How is the load controlled? If there is a slide valve, is it in its minimum position?
Verify the lubrication and cooling systems before starting the compressor; it is essential to ensure that it starts under no-load conditions. Close the inlet valve completely and open the outlet valve fully. After starting, measure the current. If the no-load current reaches or is close to the rated value, investigate mechanical issues. If the no-load current is not high, gradually open the inlet valve while measuring the current multiple times. Once the rated current is reached, check whether the outlet flow meets the specified value; if not, contact the manufacturer’s after-sales service.
The test run was successful; it’s an issue with the opening degree of the imported component.
Congratulations! Is my answer the best one? :handshake