Métodi da aikatau wakar daɗi a kofin sarki

Testai na wakar kasa suna da ma'ana ga tattara masu yadda ake gudanar da (tripping), kadan, kadan - wakar kasa, da kuma kadan dubi. Wannan tattara zamanin yana da muhimmanci don inganta hankali da amfani da circuit breakers, kuma yana cikin abubuwa mafi muhimmanci na design daidai na circuit breakers.

Zamanin main contact ana bincike bayan ake samun production, a lokacin da ake fara aiki, da kuma a lokacin da circuit breaker yake aiki a cikin periodic maintenance. Don in yi wannan testai, za su iya saki timing test devices zuwa koil da kuma main contacts na circuit breaker.

Standards na industry sun define operation time a matsayin fagen daga lokacin da ake sauki koil har zuwa lokacin da main contacts ke kasa ko kadan. A typical timing test device ya ba koil voltage, kuma ya yi amfani da internal clock don tattara zamanin da aka yi har zuwa lokacin da state na main contacts ya canza. Yana da waɗannan labari metodi mai yawa don in tafi shawar wannan canza:

• Voltage divider method: Wannan metodi yana tattara canza a voltage.

• Resistance threshold method: Yana tattara canza a resistance.

Amma, waɗannan labari metodi babu zama da amfani idan an jiha biyu na circuit breaker, saboda haka signal change yana ƙare da ake iya tafi shawar a cikin waɗannan yanayi.

Ana da metodi na test din da suke:

• Dynamic capacitance measurement (DCM)

• Current sensor measurement (CSM)

Tsarin foto na biyu ta nuna connection na timing test zuwa switchgear (a hagu) da kuma time curves (a yau).