Failure one regulator at work running a power outage or irregular automatic power outage. 
 Cause: In this case, the majority is the regulator output termination with high-power rectifier with silicon or non-linear loads, the LW-S (D) BW series of high-power compensation type power regulator is the line of the regulator, it is no waveform distortion and waveform distortion, can not have been corrected, "pollution" caused by waveform distortion and waveform distortion of the grid, so when the regulator output or access large-capacity thyristor rectifier equipment, when such non-linear load devices to pollution regulator output waveform of the grid, so that detection of signal distortion, resulting in phase sequence circuit malfunction cut off power supply and voltage accuracy. Regulator if the input waveform or frequency of the grid is not normal, it will deviate from the normal output voltage of about 10V. 
 1) approach: The output voltage adjustment potentiometer will be transferred to the normal output voltage of about 380V. 
 2) Treatment: If non-linear load conditions, the user equipment should be added to the filter device, so that the grid reduce pollution. We can also be ordered to the filter device to illustrate the power to call us with the device. 

 Fault 2, the regulator during operation, the sudden appearance of carbon brushes and carbon brush voltage regulating transformer coil serious heat, discoloration or burn the surface coil voltage regulating transformer coil. 
 Failure: 
 1) users accidentally, regulator output or add new electrical equipment put into use after the repair of old equipment, the power button on the first trial with the trial, found no fault equipment, automatic voltage regulator working properly and then transferred to work state, thus avoiding such failures. Coils have been destroyed, carbon brush, carbon brush holder shall promptly notify the factory repair. 
 2) The user has to use during severe overload (especially the regulator is close to 80% of the rated load conditions, often start high-power induction motor) 
 3) carbon brush, brush some prolonged use should not be maintained resulting in carbon brush spring pressure changes, with a brush under a variety of conductivity change significantly, over time lead to carbon brush tilt, brush fracture severe fever. 
 Approach one: reduce the regulator load or frequent start of the squirrel-cage AC motor power from the regulator output cut. 
 Approach two: strengthening the management of maintenance, replacement of damaged carbon brush and brush compression spring, use No. 0 sandpaper wipe the surface of the coil burn marks. 
 Regulator http://www.pandeng.org.cn