Should an electric motor be tested under no-load conditions after it’s purchased?
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According to the regulations, are all motors required to undergo no-load tests? I would like to ask everyone for advice. Thank you.
I work in design. I don’t understand the question you’re asking. Let’s wait for the answer together and gain some knowledge~! ~!
For larger motors, during the first start-up, the coupling to the equipment must be disconnected to enable a no-load start!
But it seems that our company rarely does this. But no problems have arisen either; maybe it was just luck? ? 、
It is necessary to conduct a no-load test to check the temperature of the motor bearings and stator, as well as whether the sound of the motor is normal, before proceeding with the load test.
No-load testing is necessary; generally, when a new motor is put into operation for the first time, the following steps need to be taken: check the appearance； Check the main installation dimensions ； Check the insulation of the windings relative to the casing ； Power-on inspection and speed/rotation direction inspection ； Measurement of no-load current. The measurement of no-load current is necessary because it is a key parameter reflecting the performance of a motor, and therefore it needs to be within an appropriate range.
It is best to conduct no-load tests and retain some original parameters as a reference for future maintenance
All motors need to undergo no-load tests. That is the manufacturer’s responsibility; generally, conducting routine tests is sufficient
After the motor is installed, tests must be carried out in accordance with GB 50150 regulations
Our company’s policy is to conduct an no-load power-on test for motors of 10KW or higher, but we have not done such tests for those with lower power ratings. The estimated reason is that motors with a capacity of 10KW are more expensive.
It must be done; here, regardless of the power level, all tests under no-load conditions are carried out in accordance with GB 50150 regulations
This should be done; (also, in order to gain a better understanding of the defects that occur during motor operation, it is possible to conduct a check test before disassembly if conditions permit). To this end, the motor is tested under load to carefully examine the temperature, noise, vibration, and other conditions of its various components, and parameters such as voltage, current, and speed are measured. After that, the load is removed and an empty-load test is conducted separately to determine the no-load current and no-load losses, with all results being recorded.
I’ve learned a lot. The consensus is that a no-load test must be conducted. GB50150。 . .
In fact, it is necessary to follow the national standards; conducting a no-load test on one’s own also provides peace of mind. Firstly, it allows for testing the actual rotation direction of the motor, and secondly, it enables comparison with the motor’s factory specifications to determine whether transportation and storage have affected its quality.