开关触点

近年来普遍使用的小车开关柜的开关触点经常因接触不良，接触电阻增大，而出现触点温升过高，甚至烧毁，造成停电的现象，这种情况在大电流开关柜中更为突出。

With widespread of dyadic handcart switchgear recently , it often happened that the switch contact temperature rising , even burning down to power failure owing to the touch head poor contact and the increasing contact resistance . This situation is more common in switchgear with large current .

提出了一种互补式开关新技术，它由两个新电路构成，即高频开关变换器与电磁开关触点状态无传感器实时采样电路。

It is consisted of two circuits : the high frequency converter and the electromagnetic switch contact state sensing circuit without any sensor .

该试验台数控系统采用IPC作为其控制主机，混合式步进电动机驱动，具有在线测量组合开关触点压降的功能。

The system adopts IPC as its main control computer and is driven by hybrid stepping motor .

万能转换开关触点组合逻辑检测仪的研制

The development of testing instrument for contact combination logic of universal change switch

高压开关触点和母线温度在线检测与监视系统

Apparatus used to measure and monitor the temperature of the contact of High-voltage-switch and / or high-voltage bus

讨论了微加速度开关触点形貌，建立了触点吸附物理模型；

The contact point figure of the micro accelerometer switch is discussed . The contact point stick physical model is established .

低压配电箱中的开关触点和接线端子因接触不良容易产生故障电弧。

The switch contactors and connecting terminals of the low voltage switchbox can occur failure arc easily for the loose contact .

由于高压开关触点、母线处于高电位，直接检测其温度一直是电力系统检测中的难题。

Due to the contacts and bus of the high voltage switch lies in high potential , it is difficult to detect their temperature directly .

本文研究了碳纤维／银（铜）基复合材料的制造方法，并应用于开关触点、电刷等。

In this paper , the fabrication of carbon fiber / Ag ( Cu ) matrix composites and its application in electrical contact device has been studied .

基于CO2传感器的高压开关柜触点超温监测仪的研制

Development of over-temperature detection apparatus for high voltage switchgear based on CO_2 sensor

提出了一种基于新型高分子示温片和固态电解质二氧化碳传感器实现间接监测高压开关柜触点超温的新方法。

A method for indirect over-temperature detection of isolated contacts in high voltage switchgear , based on a novel polymer label and an Na Superionic Conductor CO2 sensor , has been proposed .

因此，对开关柜的触点温度在线监测具有十分重要的工程意义。

Therefore , it has very important project significance to monitor switch contact temperature in switchgear online .

利用霍尔效应制作的霍尔开关元件无触点、无磨损、故障率低。

The switch utilizing Hoer 's domino effect has no crossing-dot , no abrasion and lower malfunction .

对五种典型的变压器分接开关用真空触点切换开关电路进行了分析。

Five typical circuits for the vacuum contact diverter switch used in transformer tap - changer are analyzed .

无触点磁电机的开关速度比触点磁电机的快，改善了燃料的燃烧情况。

The switch speed of a non tip magnetoelectric machine is faster than that of a tip one .

系统通过连续监测高压开关柜内触点和电缆接头的运行温度，确定触点和接头处的过热程度，当温度超过预先设置的阀值时，发出警报指示。

The system continuous monitor the temperature of the cable connector contacts and joints in the high-voltage switchgear , and determine the overheat degree , when temperatures exceed preset threshold , warning instructions .

研究了一种以银为金属基质、稀土氧化物微粒为分散相的复合镀层，可取代银镀层应用于电器开关的电触点上。

A composite coating containing silver as its metallic matrix and oxide particles of rare earths as disperse phase is developed for electric contacts and may be used as a substitute for pure silver plating film .

继电器是广泛使用的开关电器，其触点接触可靠性及失效的研究具有非常重要的意义。

The relay is a kind of switching apparatus used widely . So , it is of very important signification to study the contact reliability and contact failure of the relays ' contacts .

介绍了应用可控硅技术对矿用ZC－21A型冲击继电器进行改进，实现了用无触点开关（可控硅）代替有触点开关（单触点干簧继电器）控制。

In this paper , the ZC-21A impact relay was improved with the silicon controlled rectifier . The contact tip switch is replaced by the non-contact tip switch .

所述开关直接固定在扳机上，同时所述手柄握持部位内设有同该开关上的触点相对的触发筋。

The switch is directly fixed on the trigger while the inside of the holding portion of the hand lever has a trigger rib which is relatively arranged to a contact point on the switch .

从漏电开关工作原理入手，分析漏电开关烧损率偏高，以及由于其拒动作仍导致触电事故发生和漏电开关误动作使触点可靠性降低的各种原因，据此提出相应措施。

Analysing the work principle of switch leakage and the cause of misoperation , the author put forth appropriate measures .