Temperature of high-voltage motor windings
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After the maintenance of the primary fan motor for the 500Kw/1Kv boiler, it was tested by running it idle for 4 hours. There are two temperature monitoring points for the coils: one read 51°C and the other 54°C. Is this within the normal range? (Ambient temperature: 32°C) This is the second maintenance session. During the previous idle test run, the temperature rose to nearly 70°C, which is comparable to the temperature during loaded operation; therefore, it was sent for maintenance once again. Thank you!
Based on the information you provided, it is assumed that the normal range for the temperature of the high-voltage motor coil is below 70°C. After the first maintenance visit, the temperatures at the coil temperature monitoring points were 51°C and 54°C respectively, both of which are below 70°C; therefore, it can be considered to be within the normal range. However, after the second maintenance, the temperature at the coil temperature detection point approached 70°C, which is comparable to the temperature during loaded operation. This indicated a possible anomaly; therefore, another maintenance was carried out. Based on the above, it is recommended that you continue to monitor the temperature of the motor coils and carry out maintenance and inspections as necessary to ensure the proper operation of the equipment. .
PT100 is generally used for measuring the temperature of motors; the temperature displayed will vary depending on the installation location, which is within the normal range.