alternator,alternator is another term for ac generator.交流发电机,大型发电机,交流发电机amortisseur windings,the amortisseur windings of a synchronous ac generator are the conductors embedded in the pole faces of the rotor. theyareconnected together at both ends of the poles by end rings or end plates. their function is to dampen waveform distortion durinload changes.阻尼线圈同步交流发电机的阻尼线圈是指嵌绕在转子磁极间的导线,小型发电机,他们分别在两极用端环或端板相连接,主要功能是减弱因负载变化而引起的波形畸变。ampacityampacity is the safe current-carrying capacity of an electrical conductor in amperes as defined by code.
载流容量
载流容量是以安培数来定义导线安全载流能力。
ampere
the ampere is a unit of electric current flow. one ampere of current will flow when a potential of one volt is applied across a resistance of one ohm.
安培
安培是电流单位。1伏电压作用于1欧姆的电阻上就会产生1安培的电流。
annunciator
an annunciator is an accessory device used to give remote indication of the status of an operating component in a system. annunciators are typically used in applications where the equipment monitored is not located in a portion of the facility that is normally attended. the nfpa has specific requirements for remote annunciators used in some applications, such as hospitals.
指示器
指示器作为一个附属装置常用于远程显示系统的各个组成部分的运行状态。指示器通常使用在监测设备不在设备现场的应用。美国国家防火协会对指示器在某些行业的应用有特殊要求,例如医院等。
apparent power
apparent power is the product of current and voltage, expressed as kva. it is real power (kw) divided by the power factor (pf).
视在功率
视在功率是电流和电压共同作用的产物,用kva表示。它等于有功功率(kw)除以功率因数。
拉萨发电机维修
6. 发电机机端pt二次电压消失现象:(1)警铃响,“发电机机端pt断线”报警。(2)发电机有功、无功、电压表指示降低或为零。处理:(1)将自动调节励磁系统改为手动方式运行;(2)退出发电机复合电压闭锁过流保护;(3)通过其它表计对发电机进行监视调整;(4)通知汽机注意监视发电机。(5)检查机端pt回路,如果一、二次保险熔断,应予以更换;(6)正常后,发电机,投入发电机复合电压闭锁过流保护,将励磁调节方式改为自动方式运行。
7. 发电机励磁pt二次电压消失
现象:
(1)警铃响,“发电机励pt断线”报警。
(2)励磁调节屏发电机机端电压表指示到零。
处理:
(1)将励磁调节方式改为手动方式运行;
(2)检查励磁pt回路,如果一、二次保险熔断,应予以更换;
(3)恢复正常后,将励磁调节方式改为自动方式运行。
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