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关键词： 区域   大气   蓄电池组   胶接   轴瓦   电缆密封装置   电缆   头灯(矿工用)   矿井部件   电池   分类   分类系统   闭塞物   化合物   团料   定义   防护等级   尘埃   接地导线   电机   电的   电气工程   电驱动装置   外壳   引入线   设备   等电势跨接线   爆炸危险   爆炸防护   防爆安全性   防爆区   防爆   爆炸性   爆炸性环境   配件   耐火的   防火外壳   可燃性环境   熔断器   气爆   手提灯   点燃温度   绝缘   隔离开关   灯   插销   轻金属   灯具   机器   作标记   材料   力学   多语种的   公称尺寸   油浸   操作说明书   引燃联锁   管道   槽   塑料   插头和插座连接   电位均衡   加压   防护电气设备   防爆穴   合格试验   密封环   规范(验收)   表面   开关设备   温度   温度等级   终端室   测试   保护形式   通风孔   通风  

标准号: BS EN 60079-0-2006

摘要： This part of IEC 60079 specifies the general requirements for construction, testing andmarking of electrical apparatus and Ex components intended for use in explosive *** modified by one of the parts in the IEC 60079 series, electrical apparatus complyingwith this standard is intended for use in hazardous areas in which explosive gas atmospheres,caused by mixtures of air and gases, vapours or mists, exist under normal atmosphericconditions oftemperature –20 °C to +60 °C;pressure 80 kPa (0,8 bar) to 110 kPa (1,1 bar); andair with normal oxygen content, typically 21 % v/*** application of electrical apparatus in atmospheric conditions outside this range may needspecial *** standard does not specify requirements for safety, other than those directly related to theexplosion *** standard is supplemented or modified by the following parts of IEC 60079 concerningspecific types of protection:– IEC 60079-1: Flameproof enclosures "d";– IEC 60079-2: Pressurized enclosures "p";– IEC 60079-5: Powder filling "q";– IEC 60079-6: Oil immersion "o";– IEC 60079-7: Increased safety "e";– IEC 60079-11: Intrinsic safety "i";– IEC 60079-15: Type of protection “n”;– IEC 60079-18: Encapsulation "m".This standard is supplemented or modified by the following apparatus standards:– IEC 60079-25– IEC 60079-26– IEC 62013-1– IEC *** part of IEC 60079, along with other parts in the IEC 60079 series and the additionalstandards mentioned above, is not applicable to the construction of electromedical apparatus,shot-firing exploders, test devices for exploders and for shot-firing *** European Standard EN 60079-0 covers Category M2, 2G and 3G apparatus and partlyalso Category M1 and *** all cases where apparatus are involved the references to zones shall be read:Zone 1 Category 2GZone 2 Category 3G

关键词： 交流电流   交流电压   断路器   电路   分类   连接   定义   直流电压   电气器具   电气工程   电气保护设备   电气安全   电磁兼容性   故障电流断路器   故障电流   熔断器   检验   干扰抑制   线路开关   低电压   低压电器   低压开关设备   作标记   防电击   保护设备   家用电流工作断路器   安全装置   规范(验收)   开关   开关设备   试验   电压  

标准号: BS EN 60947-2-2006

摘要： This standard applies to circuit-breakers, the main contacts of which are intended to beconnected to circuits, the rated voltage of which does not exceed 1 000 V a.c. or 1 500 V d.c.;it also contains additional requirements for integrally fused *** applies whatever the rated currents, the method of construction or the proposed applicationsof the circuit-breakers may *** requirements for circuit-breakers which are also intended to provide earth-leakageprotection are contained in Annex *** additional requirements for circuit-breakers with electronic over-current protection arecontained in Annex *** additional requirements for circuit-breakers for IT systems are contained in Annex *** requirements and test methods for electromagnetic compatibility of circuit-breakers arecontained in Annex *** requirements for circuit-breakers not fulfilling the requirements for over-current protectionare contained in Annex *** requirements for modular residual current devices (without integral current breakingdevice) are contained in Annex *** requirements and test methods for electromagnetic compatibility of circuit-breakerauxiliaries are contained in Annex *** requirements for circuit-breakers used as direct-on-line starters are given inIEC 60947-4-1, applicable to low-voltage contactors and *** requirements for circuit-breakers for the protection of wiring installations in buildings andsimilar applications, and designed for use by uninstructed persons, are contained inIEC *** requirements for circuit-breakers for equipment (for example electrical appliances) arecontained in IEC *** certain specific applications (for example traction, rolling mills, marine service) particular oradditional requirements may be necessary.

关键词： 交流电流   交流电压   室温   辅助电路   特性   断路容量   校准   断路器   电路   分类   间隙   条件   连接件   结构要求   建筑工程   触点   电流   阻尼(波)   定义   设计   词典   尺寸选定   直流电流   直流电压   消耗能量   电器   电气工程   电气保护设备   电气安全   电磁兼容性   电子的   EMC   故障电流断路器   故障电流   击穿   频率   熔断器   手动的   操纵   热学   加热   批注   检验   装置   绝缘强度   绝缘件   干扰抑制   中断   漏电路径   线路开关   低电压   下降   低压设备   低压开关设备   主电路   维护   作标记   安装   操作   超荷载   过电压   工作性能   电动的   产品信息   性能   防电击   保护设备   额定值   剩余电流驱动的断路器   安全   安全装置   短路   规范(验收)   材料强度   应力   供应系统   关闭   开启   开关   开关设备   温度   温升   热震   试验周期   试验序列   试验   运输   跳闸电流   脱扣机构   振动   电压  

标准号: BS EN 60947-2-2006+A1-2009

摘要： This standard applies to circuit-breakers, the main contacts of which are intended to be connected to circuits, the rated voltage of which does not exceed 1 000 V a.c. or 1 500 V d.c.;it also contains additional requirements for integrally fused *** applies whatever the rated currents, the method of construction or the proposed applicationsof the circuit-breakers may *** requirements for circuit-breakers which are also intended to provide earth-leakage protection are contained in Annex *** additional requirements for circuit-breakers with electronic over-current protection are contained in Annex *** additional requirements for circuit-breakers for IT systems are contained in Annex *** requirements and test methods for electromagnetic compatibility of circuit-breakers are contained in Annex *** requirements for circuit-breakers not fulfilling the requirements for over-current protectionare contained in Annex *** requirements for modular residual current devices (without integral current breakingdevice) are contained in Annex *** requirements and test methods for electromagnetic compatibility of circuit-breakerauxiliaries are contained in Annex *** requirements for circuit-breakers used as direct-on-line starters are given in IEC 60947-4-1, applicable to low-voltage contactors and *** requirements for circuit-breakers for the protection of wiring installations in buildings andsimilar applications, and designed for use by uninstructed persons, are contained in IEC *** requirements for circuit-breakers for equipment (for example electrical appliances) are contained in IEC *** certain specific applications (for example traction, rolling mills, marine service) particular or additional requirements may be *** Circuit-breakers which are dealt with in this standard may be provided with devices for automatic opening under predetermined conditions other than those of over-current and undervoltage as, fo

关键词： 开发工具包   NKK   LCD显示器   显示模块   按钮开关   可编程连接器   设计理念  

摘要： NKK Switches推出其SMARTSWITCH开发工具包，能够快速实现新的设计理念的原型。这些开发工具包有三种：第一，含有一个可编程LCD显示模块和两个安装在PCB上的轻触开关，工程师可以选择和显示不同的图形（IS—Dev Kit—1）；第二，两个LCD可编程按钮开关（IS—Dev Kit—2）。这两种工具包都在PC板上，带有闪存、电源和可编程连接器。第三，工具包具有面板显示单元，包括两个LCD按钮和一个LCD显示器（IS—Dev Kit—3）。

关键词： Electronic circuit design   Electronic circuits   Electric circuits   Electric switchgear   Electronic apparatus & appliances   Electric currents  

摘要： This Design Idea describes an enhancement to a previous one (Reference 1).The circuit in Figure 1 uses a normally open SPST pushbutton switch, S{sub}1, instead of the SPDTswitch that the original design required. You can use a membrane switch to significantly simplifythe industrial design of the device and enhance its ergonomics. In addition, this circuit slightlyreduces the current drain in active mode by eliminating current flow through the unactuated *** standby mode, MOSFET Q{sub}1 remains off and consumes less than 1 μA of leakage current from thebattery. Pressing switch S{sub}1 turns on Q{sub}1 by pulling its gate to ground through diodeD{sub}1. Voltage regulator IC{sub}1 turns on and supplies power to microcontroller IC{sub}2. Themicrocontroller boots up and asserts its P 1.1 output high, turning on transistor Q{sub}2 andlatching on the system's power to allow release of S{sub}1. Meanwhile, resistor R{sub}3 pulls themicrocontroller's input, P1.2, to V{sub}(CC). Pressing the switch a second time pulls themicrocontroller's P1.2 input low through diode D{sub}2 and signals the button-pressed event to thefirmware. After completing its program, the microcontroller asserts its output P{sub}(1.1) low toturn off Q{sub}2 and, consequently, Q{sub}1, removing power from the system until the user pressesS{sub}1 and restarts the process.

关键词： LED照明   按钮开关   CIT   RoHS   SPDT  

摘要： CIT Relay ＆ Switch发布了其CH系列发光LED按钮开关。功能包括在SPDT和DPDT设置下的瞬时闪亮和交替闪亮。方式包括中心点照明或圆圈照明，有红色、黄色、绿色、蓝色、白色和橙色。LED驱动电压从6VDC到220VAC。面板安装形式可选择不锈钢、抛光镀镍或嵌入式执行器。开关额定值为1A，24VDC／125VAC和．250VAC时5A。面板挖空16mm；开关表面宽度（包含倒角）是18mm。采用蓝色LED照明的DPDT的批量售价范围是7．95美元到11．96美元。

关键词： 差分放大电路   PSPICE   仿真分析  

摘要： 差分放大电路作为集成运算放大器的输入级电路,具有电路结构复杂、分析繁琐的特点,一直是模拟电子技术设计与分析中的难点。PSPICE作为著名的电路设计与仿真软件,具有仿真速度快、精度高等优点。本文应用PSPICE对差分放大电路的工作特性进行了较全面的仿真,利用PSPICE分析、研究了差分放大电路的时域响应、频率响应以及温度对其性能的影响。

关键词： CJX   交流接触器   接触器  

标准号: JB/T 7435-2006

摘要： 本标准规定了CJX系列交流接触器通用的型式、参数、技术要求、试验方法、检验规则等。 本标准适用于CJX系列交流接触器(以下简称接触器)。接触器主要用于交流5OHz,其主触头额定工作电压至1000V,在ACJ使用类别下额定工作电压为380V时额定工作电流至630A的电路中,供远距离接通和分断电路,并适用于频繁地控制交流电动机,也可与适当的热过载继电器组成电磁起动器,用以保护可能发生操作过负荷的电路及断相的电路。 本标准适用于下列交流接触器的基本品种规格： a)CJXl系列交流接触器； b)CJX2系列交流接触器； c)CJX3系列交流接触器； d)CJX4系列交流接触器； e)CJX5系列交流接触器； f)CJX8系列交流接触器。 上述系列的其他品种规格,可由制造厂制定符合本标准通用要求的企业标准。 对于接触器与功能模块(功能电器)构成的组合电器和由两台接触器组成的联锁接触器的基本要求,见附录A 。 交流额定电压1140V的接触器可参照本标准执行。

关键词： 三相交流电动机   缺相保护电路   磁力启动器   设计   过载保护功能   三相电动机   启动控制   控制电路   熔断器   主电路  

摘要： 常规三相电动机大多数是采用磁力启动器来实现远程启动控制（图1），它只具有短路、过载保护功能，对缺相引起烧电动机是毫无防范的。主电路从熔断器开始向下的任何部位缺相，控制电路都不会作任何对应反应。

关键词： 电压互感器   熔断器   停机事故   发变组匝间保护   断线闭锁继电器  

摘要： 马鞍山发电厂12号发电机1起因电压互感器(以下称TV)初级熔断器熔断,导致发变组纵向零序电压匝间保护动作跳闸停机,从TV初级熔断器的结构和发变组LB-5型断线闭锁继电器的原理出发,对异常工况进行了较系统的原理分析,认为该熔断器运行年久,环境较恶劣,长期在重力和热积累的作用下,熔体出现老化,导致在工作电流下发生断裂,加上采用的保护装置原理上不完善,导致了事故的发生。并提出和实施了加强熔断器管理及在发变组保护中选用南自厂的微机型发变组保护等预防和改进措施。