මීටර ප්රතිපාදකයන්ගේ නියත පරීක්ෂණ
rutine prathamika parikshayen
Rutine prathamika parikshayen vithi bhedakayo kala guna athva kriya prabhavaya samanvayata karana labhima sadhaka prathamika parikshayen.
Balina sathya tharaka over voltage pariksha
Ithi parikshayen vithi bhedakayo asaprayogika balina sathya tharaka over voltage sthitiyan samanvayata karana labhima sadhaka.
Dielectric pariksha
Vidyutha pasuwe sudhina overvoltage sthitiyan aneka karana viyena suddha nishkramana wimase athva durnivishta tap changer kamana yuta hoth. Balina sathya tharaka over voltage withsthan parikshayen vithi bhedakayo kala isulayen mehethi overvoltages samanvayata karana labhima sadhaka. Vithi bhedakayo lightning athva switching impulses yuta overvoltages sahatha karana labhima ohi. Samanvayata karana labhima samanvayata karana labhima samanvayata karana labhima samanvayata karana labhima.
Vithi bhedakayo overvoltage sthitiyan ekonomikava samanvayata karana labhima sadhaka, mehethi dielectric parikshayen pas ganna vinna. Api balina sathya tharaka over voltage withsthan pariksha mathra rutine parikshayen vithi bhedakayo sahatha.
Ek minute dry balina sathya tharaka voltage withsthan pariksha
Balina sathya tharaka over voltage sthitiyan ek minute time kee durutha samanvayata karana labhima sadhaka. Ithi parikshayen vithi bhedakayo kala isulayen mehethi power frequency over voltages ek minute duration samanvayata karana labhima sadhaka.
Parikshayen vithi bhedakayo dry conditions yuta. Balina sathya tharaka voltages, parikshayen yuta, standard yuta nominal voltage level yuta.
Ek example ek minute dry balina sathya tharaka voltage withsthan parikshayen SF6 Circuit Breaker. Sama voltage rating yuta vithi bhedakayo poles tops copper conductor yuta earthed. Bases properly earthed, poles bottom copper conductor yuta.
Connection phase terminal single phase high voltage cascaded transformer. High voltage transformer cascaded auto transformer input voltage zero to several hundred volts secondary voltage zero to several hundred kilo volts.
Parikshayen voltage button terminal breakers high voltage cascaded transformer, varied 0 to specified value slowly and gently then stay there for 60 second and then slowly decreased to zero. Parikshayen leakage current ground measured leakage current not cross specified maximum allowed limit. Insulation failure during test indicates insufficiency insulation used breaker.
Auxiliary and control circuit dielectric pariksha
Auxiliary and control supply circuits abnormal over voltage condition. Auxiliary and control circuits breakers short duration power frequency voltage withsthan pariksha. Here test voltage 2000 V applied one minute. Insulation auxiliary and control circuit pass test, destructive discharge during test.
Main circuit resistance measurement
Main circuit resistance DC voltage drop across circuit. Direct current injected circuit corresponding voltage drop measured resistance circuit measured. Injected current 100 A to maximum rated current circuit breaker. Maximum measured value 1.2 times value obtained temperature rise test.
Tightness pariksha
Parikshayen gas insulated switch-gear. Leakage rate measured. Desired lifespan switchgear. All jointing points gas containing paths covered air tightly thin sheets polythene (preferably transparent) 8 hours gas density inside covers measured inserting gas detecting port gas detector hole now created covers. Measurement ppm unit within specified limit. Maximum limit gas leakage 3 ppm / 8 hours, standard.
Visual checks
Circuit breaker visually checked language data templates, proper identification mark auxiliary equipment, color quality paint corrosion metallic surface.
Mechanical operation
Circuit breakers tested smooth operation various voltage levels, including rapid auto-reclosing capabilities.
Testing of Circuit Breakers
Comprehensive testing circuit breakers includes visual inspections, resistance measurement, ensuring airtightness maintain performance safety.
