Kawarwari na Tura na Iyakokin Kashi

Akwai mafi masu lalacewa a kan wasan trip circuit wanda ya fi dace a kan breaker. Yana da zama da za a iya kula breaker ba tare da haka ba saboda wadannan ma'ana a kan current. Misali suna cikin zama da pressure na gas yana fito a kan SF6 breaker, ko kuma pressure na air yana fito a kan breaker mai tsarki. A lokacin da zanen bayan haka, trip coil ta CB ba zan iya kula ba. Saboda haka, ana bukata NO contact a kan relay na pressure, ga gas da air, za su duba da trip coil. Wani babban abu game da trip coil shine, ba zan iya kula ba idan an samu fiye breaker. Wannan ya faru da ita a kan akwai NO contact a kan auxiliary switch ta breaker, za su duba da trip coil. Kuma a nan, trip circuit ta CB yana da shiga da mafi terminal contact a kan relay, control panel da breaker kiosk.

Saboda haka, idan wani daga cikin terminal contact suka fitar, CB ba zan iya kula ba. Ba haka ba, idan DC supply ta trip circuit ya fito, CB ba zan kula ba. Don in gano wannan abin da ba daidai, trip circuit supervision ya zama da muhimmanci sosai. Ta hanyar wannan, an samu tasirin mutanen trip circuit healthy. A nan, an duba da wani lamp, wani push button da wani resistor a kan contact na protective relay. Idan kowane contact ce ta protective relay su ne, a lokacin da push button (PB) an sakamako, network na trip circuit supervision ya zama da kasa, kuma lamp ya yan nuna cewa breaker ya fi dace don kula.

Wannan scheme shine don supervision idan breaker ta fiye. Wannan scheme suna nufin post close supervision. Akwai wani baki daya na supervision wanda suna nufin pre da post close supervision.

Wannan scheme na trip circuit supervision shine da muhimmanci. Farkon da ke cikin wannan scheme shine, an duba da wani NC contact a kan auxiliary switch wanda ke same a kan NO contact na trip circuit. NO contact ya zama da kasa idan CB ta fiye, NC contact ya zama da kasa idan CB ta samu fiye, kuma vice versa. Saboda haka, a lokacin da breaker ta fiye, network na trip circuit supervision ya zama da kasa via NO contact, amma idan breaker ta samu fiye, network na sama ya zama da kasa via NC contact. Resistor an yi da ita series da lamp don in kawo karfi ga kula wa breaker saboda internal short circuit wanda ya faru saboda failure da lamp.

Idan kuma an yi magana game da distance control installation, an bukata relay system. A nan, an nuna scheme na trip circuit supervision inda ake bukata remote signal.

Idan trip circuit ta da kyau da breaker ta fiye, relay A ya zama da energy, wanda ya ci NO contact A1, kuma relay C ya zama da energy. Relay C da energy ya ci NC contact a cikin open position. Idan breaker ta samu fiye, relay B ya zama da energy, wanda ya ci NO contact B1, kuma relay C ya zama da energy. Saboda C ya zama da energy, ya ci NC contact C1 a cikin open position. Idan CB ta fiye, idan an samu fitar a cikin trip circuit, relay A ya samu energy, wanda ya ci contact A1 a cikin open, kuma relay C ya samu energy, wanda ya ci NC contact C1 a cikin close position, kuma alarm circuit ya faru. Trip circuit supervision ya faru da relay B a lokacin da breaker ta samu fiye kamar relay A a lokacin da breaker ta fiye. Relays A da C suna da time-delayed da copper slugs don in kawo karfi ga spurious alarms a lokacin da tripping ko closing operations. Resistors suna da shiga da relays, kuma irin da suke da suke zaba da ita saboda idan wani component ya samu short-circuit, tripping operation ba zan faru ba.

Supply na alarm ya bukata muke sa supply na main trip don in iya faru alarm idan supply na trip ya fito.

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