沖擊與振動

Shock and Vibration

如果微動開關(guān)用在需經(jīng)受沖擊和振動的場合, 選擇大操作力的開關(guān), 能夠改善抗沖擊和振動性能.如果有可能,將驅(qū)動桿運動方向與沖擊或振動加速度方向成90度角. 另外要選擇過行程盡可能大的微動開關(guān)

If switches are likely to be subjected to shock or vibration, select models with the highest avail able actuating force. If possible, the switches should be mounted so that the line of acceleration is at right angles to the travel of the plunger. The maximum avail able overtravel should be used.

直流負載

Direct Current

在直流負載情況下, 不要使用超過指定值的電流, 以避免產(chǎn)生破壞性電弧,導致觸點熔化或霧化. 在一些感性直流回路中要增加消弧抑制措施, 與開關(guān)和電源串聯(lián)在一起（或需要開關(guān)觸點間距增大）.

Direct current (DC) ratings where shown should not be exceeded if destructive arcing and contact welding are to be avoided. Some form of arc suppression is recommended when switches are used in DC circuits containing inductive devices wired in series with the switch and the supply.

鎢絲燈負載

Lamp Loads

由于白熾燈都帶有很高的浪涌電流, 因此應用要具體分析.

Because of the very high inrush currents associated with incandescent lamps, applications should be subject to individual assessment.

容性負載

Capacitive Loads (including fluorescent lamps)

容性負載會產(chǎn)生很高的尖峰電流,導致觸點熔化, 因此具體應用需具體分析.

These can generate very high peak currents which can cause contact welding. Applications should be subject to individual assessment.

感性負載

Inductive Loads

感性負載,伴隨變化的電壓,比如帶一個電機, 可能會產(chǎn)生6倍正常工作電流的浪涌電流.對于特定的開關(guān), 一般采用L/R = 5ms(直流) 和cos∮（功率因數(shù)）= 0.75-0.8(交流)來描述開關(guān)的性能（UL1054標準）cos∮=0.6-0.65.

an inductive circuit, with alternating voltage, for example, incorporation a motor(cos∮<1) can cause current surges up to 6 times the nominal current. For certain switches, we give electrical edurance curves with L/R = 5ms in DC and cos∮= 0.8 in AC.