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微动开关技术说明

2013-11-6 10:19:09点击:

■一般用语

(1)一般用语

微动开关:具有微小接点间隔和快动机构,用规定的行程和规定的力进行开关动作的接点结构,用外壳覆盖,其外部有驱动杆的一种开关。(以下称开关)有接点:在开关类型中,和具有开关特性的半导体开关相比,通过接点的机械开关来实现开关的功能。接触形式:根据各种用途构成接点的电气输入输出电路[(16)中显示]。

额定值:一般指作为开关特性和性能的保证基准的值,例如额定电流、额定电压等,其前提是特定的条件(负载的种类、电流、电压、频率等)。

树脂固定(塑封端子):在端子部位用导线配线后,通过填充树脂来固定该部分,消除露出的带电部位来提高防滴性的方法。

绝缘电阻:指非连接端子间、各端子和不带电金属部位间、各端子和地间的电阻值。

耐压:在规定的测定部位加1分钟高电压后,不会引起绝缘损坏的临界值。

接触电阻:表示接点的接触部位的电阻,但一般表示包含弹簧和端子部位导体电阻的电阻值。

抗振性:误动作振动微动开关在使用时,由于振动闭合的接点在超过规定的时间内不分离的振动范围。

抗冲击性:耐久冲击指微动开关在运输中或者安装时不会受到由该机械冲击带来的各部位的损伤,并满足动作特性的范围内的冲击。

误动作冲击?指微动开关使用时由于冲击闭合的接点在超过规定的时间内不分离的冲击范围。

(2)关于结构、构造的用语

●微动开关的结构、构造

 

(3)有关寿命的用语

机械寿命:指接点不通电,以规定的操作频率将过行程(OT)设定为规格值使其运行时的开关寿命。

电气寿命:在接点上连接额定负载,以规定的操作频率将过行程(OT)设定为规格值进行开关时的开关寿命。

(4)标准试验状态

开关的试验条件如下。

环境温度:20±2℃、相对湿度:65±5%RH、气压:101.3kPa

(5)N水平参考值

表示可靠度为60%(λ60)下的故障水平。

λ60=0.5×10-6/次表示在可靠度为60%下,故障率为次以下。