智能制造網APP
智能制造網手機站
智能制造網小程序
智能制造網官微
智能制造網服務號
過流過載保護用PTC熱敏電阻器
主要品種
過流過載保護用的PTC熱敏電阻器有：瓷片型，殼體型，包封型及貼片式等。
主要品種
過流過載保護用的PTC熱敏電阻器有：瓷片型，殼體型，包封型及貼片式等。
過流過載保護PTC熱敏電阻的工作原理
串聯在負載電路中，當電路處于正常工作狀態時，流過過載保護PTC熱敏電阻的電流不足以使其自熱溫升超過過載保護PTC熱敏電阻的居里溫度，而總是處于低阻狀態。 當電路出現故障使回路電流增大時，過載保護PTC熱敏電阻的電阻值因自熱溫升而出現阻值階躍，直至把電路切斷。在電路故障排除后， 過載保護PTC熱敏電阻冷卻并恢復到低阻態，同時電路也進入正常工作狀態。下次電路再出現故障時，過載保護 PTC熱敏電阻又可以進入保護狀態。
過流過載PTC熱敏電阻器的應用
程控交換機、程控、配線架、保安單元、變壓器、晶體管、自動售貨機、汽車、洗滌機、熒光燈、計算機外設、電機啟動器、家用電器、電子儀表及小型電源設備中。
串聯在負載電路中，當電路處于正常工作狀態時，流過過載保護PTC熱敏電阻的電流不足以使其自熱溫升超過過載保護PTC熱敏電阻的居里溫度，而總是處于低阻狀態。 當電路出現故障使回路電流增大時，過載保護PTC熱敏電阻的電阻值因自熱溫升而出現阻值階躍，直至把電路切斷。在電路故障排除后， 過載保護PTC熱敏電阻冷卻并恢復到低阻態，同時電路也進入正常工作狀態。下次電路再出現故障時，過載保護 PTC熱敏電阻又可以進入保護狀態。
過流過載PTC熱敏電阻器的應用
程控交換機、程控、配線架、保安單元、變壓器、晶體管、自動售貨機、汽車、洗滌機、熒光燈、計算機外設、電機啟動器、家用電器、電子儀表及小型電源設備中。
過流過載PTC熱敏電阻器的優點
和傳統的熔斷絲相比，過流過載保護PTC熱敏電阻具有反應快、無觸點、無明火、無噪聲和可恢復性強等優勢，和有機高分子PTC熱敏電阻相比，陶瓷過流保護PTC熱敏電阻在實現多次保護后常溫電阻變化不大，耐電壓性能較好，恢復性能、穩定性能優良。如果把它與負載進行熱耦合安裝，可對過熱和過流雙重作用導致的電路故障進行保護。
和傳統的熔斷絲相比，過流過載保護PTC熱敏電阻具有反應快、無觸點、無明火、無噪聲和可恢復性強等優勢，和有機高分子PTC熱敏電阻相比，陶瓷過流保護PTC熱敏電阻在實現多次保護后常溫電阻變化不大，耐電壓性能較好，恢復性能、穩定性能優良。如果把它與負載進行熱耦合安裝，可對過熱和過流雙重作用導致的電路故障進行保護。
PTC Thermistors for Restricting Overloading and Current
Main Categories
According to the appearance, the PTC Thermistors for restricting overloading and current can be divided into some categories, such as porcelains, shellies, wrapping and pasters.
Working Theories
The restricting overloading protection PTC Thermistor is connected in series in the overloading circuit. when the circuit is in the normal working state , the current flowing through the PTC Thermistor is not high enough to make the temperature exceed the Curie temperature for protection ,and it is always in the low state of resistance. When the circuit breaks down and the return circuit current increases, the resistance of restricting overloading protection PTC Thermistor goes up sharply for being warm, until the circuit is cut off. After the clearing of the circuit trouble, the PTC Thermistor begins to cool and come back to the state of low resistance, and then the circuit enters normal working condition. When the circuit breaks down next time, the PTC Thermistor can enter the state of protection again.
Applications
Restricting overloading protection PTC Thermistor is mainly used in the remote alternating machinery, remote control ephones, distributing frames, safe-guard units, voltage transformers, crystal conductors, automats, cars, washing-machines, fluorescence lamps, computer peripheral equipments, motor starters, household appliances, electronic instruments and micro power equipments at present.
Advantages
Compared with the traditional fusing filament, the restricting overloading protection PTC Thermistor reacts fast, contactless, flameless, noiseless and recoverable. Meanwhile, compared with the organic high molecule PTC Thermistor, the pottery restricting current PTC Thermistor of normal temperature changes little after numerous protection with a better performance of withstanding voltage. Additionally, it can resume steadily and has a good performance. If hotly-coupling installed with overloading, it can repair the circuit trouble caused by the double effects of overheating and overcurrent.
