For Vacuum Circuit Breaker should be checked once a year to maintain power to ensure normal operation. Normal annual hope do the following work:
1) The interrupter should be fracture frequency voltage withstand test, and to be recorded. Vacuum of low pressure is not good or tubes should be replaced.
2) wipe the insulation, the insulation should conduct their frequency voltage withstand test, bad insulation insulation should be replaced immediately.
3) the opening of the vacuum circuit breaker from the contact record should be measured in travel books, find out the reasons if changes should be handled (such as the connection may be loose or mechanical abrasion and other reasons), a conditional response to mechanical characteristics of the test and record breaker . Parameters on the mechanical properties should be changes in the larger cause and to adjust treatment.
4) at the connections of the adjustable connection bolts, nuts, etc. should check whether there is loose, especially at the knee arm auxiliary switch connecting a small screw, moving interrupter connected to conductive rod locking nuts should be checked whether loose.
5) the rotation of the joints should examine the various retainer, such as whether the loose pin, and the rotation, sliding part of the lubricating grease.
6) the use of greater than 1600A in the current above the Indoor Vacuum Circuit Breaker, each pole should be DC resistance measurement, recorded in the book and found that the resistance goes up and the reasons for exclusion should be checked.
7) To replace the interrupter should be the product specification requirements, replacing mechanical properties should be carried out after the test and pressure test.
After the inspection, and put into operation before the load operation should be continuous 8 to 10 times, check to be functioning normally, no abnormal sounds, no abnormal shaking, combined, Tripping coil without fever before put into operation.
The article comes from Vacuum Circuit Breaker Handcart,Embedded Pole.