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EnglishWater heater transformer: the problem of abnormal sound of transformer
Release time:
2020-09-30
Source:
Water heater transformerThe core silicon steel sheet vibrates due to the alternating magnetic flux and generates sound. During normal operation, the sound is very clear, the load of the transformer has changed greatly, and the operating state is abnormal.
The abnormal noise is usually caused by an excessive load. This phenomenon can be judged by measuring the load and touching the case temperature of the distribution transformer. Find out the cause of the overload and reduce the overload beyond the allowable range. Due to overload and the possibility of deterioration and damage of the insulation of the distribution transformer, further necessary tests should be carried out.
The transformer has an impact load, such as frequent starting of large motors, intermittent operation of welding machines, etc., and the sound suddenly increases or decreases, causing irregular changes.
When the system is short-circuited or grounded, the fuse will not be disconnected in time (because the short-circuit current is too large and the set capacity of the fuse is too large). Due to the influence of the short-circuit current, the magnetic path of the magnetic flux is seriously unbalanced, and strong and uniform noise is generated.
The iron core and pliers of the transformer are loose, the sound becomes louder, and there is intermittent noise. After the test, the load current is small, the temperature is not high, the secondary air delivery voltage is basically balanced, and the operation is not monitored; The sound continues to increase, replacement and inspection should be considered.
When the temperature of the transformer box is abnormal and the temperature of the transformer box is abnormal, the temperature of the transformer box must be inspected. The secondary load of the transformer is then switched off and left idle. At this time, if the sound is normal, it is an external fault. Abnormal noise and high external temperature during idling operation may cause internal failure of the transformer. After stopping, use the meter to make further measurements to confirm whether to continue running.
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