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了解“温度保险丝”基本知识这一篇就够-干货

时间:2021-09-02 阅读量:9493

温度保险丝又称热熔断体(国标GB9816.1-2013),是温度传感器电路的切断装置。温度保险丝可以感应电气设备电子产品异常运的过热,切断电路避免火灾的发生。主要应用于吹风机、电熨斗、电饭煲、电炉、变压器、电机、饮水机、咖啡壶等。需注意的是温度保险丝运行后不能再使用,只能在熔断温度下运行一次。那么下面主要讲解温度保险丝相关知识。
了解“温度保险丝”基本知识这一篇就够-干货
温度保险丝主要有合金型温度保险丝和有机物型温度保险丝两种。其中合金型温度保险丝有轴向型和径向型两种。而温度有76℃-240℃,电流:1A-50A。其主要的安规认证有:UL、VDE、PSE、CUL、CCC、TUV等等,另外随着人们环境意识的提高,所有均质材料都要求环境保护材料,如合金、引脚等需要环境保护。

温度保险丝选型时需注意以下几点:
(1)当电路异常时,需要断开的温度等于温度保险丝的实测动作温度;
(2)电路正常工作时的温度≤温度保险丝的保持温度;
(3)电路正常工作时的电流≤温度保险丝的额定电流;
(4)电路接通后的电压≤温度保险丝的额定电压;

温度保险丝相关术语释义如下
一、额定动作温度 Rated Function Temperature (Tf)

通10 mA的负载电流时,加热使温度保险丝断开的温度(用于厂家区分规格,重点应该关注实测动作温度);

The temperature of the Thermal-link which causes it to change the state of conductivity with a

detection current up to 10 mA as the only load.

允许偏差 Tolerance: Tf 0 /– 10 °C (GB 9816, EN 60691, K60691).

允许偏差 Tolerance: Tf ± 7 °C (J60691)

二、实测动作温度 Fusing Temperature

置于油池中,通10 mA以下的负载电流,每分钟升温0.5℃~1℃,测断开温度。

The temperature of the Thermal-link which causes it to change its state of conductivity is measured with silicone oil bath in which the temperature is increased at the rate of 0.5℃~1℃/min, with a detection current up to 10 mA as the only load.

三、保持温度:Holding Temperature (Th)

持续通额定电流168小时不断开的最高温度。

The Maximum temperature at which a Thermal-link will not change its state of conductivity when conducting rated current for 168 h.

四、极限温度Maximum Temperature Limit (Tm)

在规定的时间内不破坏机械和电气特性所能承受的最高温度。

The temperature of the Thermal-link stated by the manufacturer, up to which the mechanical and

electrical properties of the Thermal-link having changed its state of conductivity, will not be impaired for a given time.

五、额定电流:Rated Current (Ir)

温度保险丝分类用,允许用于电路并安全断开的最大电流。

The current used to classify a Thermal-link, which is the Maximum current that Thermal-link allows to carry and is able to Cut off the circuit safely.

六、额定电压:Rated Voltage (Ur)

温度保险丝分类用,允许用于电路并安全断开的最高电压。

The voltage used to classify a Thermal-link, which is the Maximum voltage that Thermal-link allows to carry and is able to Cut off the circuit safely.

七、瞬时过载电流ransient Overload Current (Ip)

温度保险丝在不破坏特性的情况下,所能承受的最大瞬态过载电流(温度保险丝承受的瞬时过载电流为额定电流的15倍,100个周期温度保险丝不应该动作)

A direct current pulse at which the Thermal-link is able to withstand without impairing it’s characteristics.


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