查询词典 power supply

The protective relay is very important factor to avoid unselected trip under complex faults between double circuit lines, and to enhance the reliability of power supply. In order to improve the performance of the relay devices during evolved faults, an evolve fault criterion used for power system EHV transmission lines is proposed in this paper.

同杆并架输电线路发生各种故障时继电保护动作的正确性及可靠性将极大地影响电力系统的供电可靠性和运行稳定性，因此对配置于同杆并架输电线路继电保护的研究有着十分重要的意义。

High power factor, high efficiency, low noise, is the character that power supply and electronic equipment pursuing.

高功率因数、高效率、低噪音是电源装置和用电设备普遍追求的品质。

The affect of electric arc furnace on power quality deterioration of power supply system appears as voltage fluctuation.

电弧炉对供电系统造成的电能质量问题主要是引起供电系统电压波动。

Pulse power supply, with its discrete characteristic, has a wide application in the field of EDM, pulse electroplating, electric weld, high power laser pump, high frequency induction heating, purification of exhaust gas and waster water, electrostatic dust precipitation, ozone production and surface heat treatment.

而脉冲电源由于具有断续供电的特性，在电火花加工、脉冲电镀、电弧焊接、高功率激光泵、高频脉冲感应加热、工业废气处理、脉冲电解污水处理、静电除尘、臭氧制取和表面热处理等领域获得了广泛的应用。

The logical part of the driver uses a high grade single chip microcontroller.The driver has a special structure switching main circuit,therefore it eliminates the driving chip of the power devices.The driver needs only one exterior power supply.

驱动器逻辑部分采用高性能的单片机，开关主电路中采用特殊结构，省去了功率器件的驱动芯片，整个驱动器只需一个外部电源。

Under the leadership of the National Headquarters for Earthquake Disaster Mitigation, as of 8:00 on May 19th, the telecommunications sector has sent out 26,000 people for repairing, dispatched 391 emergency telecoms vehicles, 979 satellite telephones, 7422 power generators, over 2000 sets of emergency communications equipment and equipment for repairing, 1000 cells specifically for the satellite telephones and 150 sets of field power supply equipment.

在国务院抗震救灾指挥部的统一指挥下，截至5月19日8时，通信行业已出动抢修人员2.6万人、调动391台应急通信车、979部卫星电话、7422台发电油机、2000多套其它应急通信和抢修设备，1000块卫星电话专用电池，150套野外电源装备，累计调用卫星转发器资源496 MHz，发送应急提示和抢险指导等方面的短信9亿条。

When the power supply operates under standby mode, a Fly-back converter is used to provide standby power (5V/1.5A).

当电源模组在待机态时，使用返驰式转换器提供5V/1.5A 待机电源。

The technical problems, about shortage of separation distance, the feasibility of high-rise polymerization factory building, the fire separation and explosion-proof design of polymerization factory building, the selecting and arrangement of water spraying extinguishing system nozzle, the establishment of deluge system valve, and the essentiality of water spraying extinguishing system which is to be established to protect the VCM gasholder, the positioning of water curtain settled under the space which connect the PVC pack house and pack department and how long the system continue operate? The selecting and the quantity of fire extinguishing agent about gas extinguishing system, which will be used in the new 35KV switch station and some rooms including cabinet room, primary control room, UPS room, voltage changer room, belong to new polymerization power panel and UPS station. Designing the model of power supply and distribution for fire-fighting and designing the hardware organization, software, model of data transmission and fire gang control logic programmer about automatic fire alarm system. Making certain the grade of release source point in the fire or explosive atmosphere and delimiting different grade explosion-proof space. Selecting correct explosion-proof construction of electrical apparatus and delimiting the class of building lightning protection, putting forth the concert steps to deal with thunder stroke and electrostatic discharge and so on, have been deeply researched in the process of designing and then the concert steps to deal with them have been putted forth.

针对设计中遇到的防火间距不足、聚合厂房可否采用高层厂房、聚合厂房的防火分隔和防爆设计、水喷雾灭火系统的喷头选型和布置、雨淋阀组设置、VCM气柜是否需要设置水喷雾灭火系统、PVC仓库与包装车间相通处水幕带的布置和系统工作时间的确定、新建35kV开关站和聚合配电及DCS机柜间内的机柜间、主控室、UPS间、变压器室等处设置的气体灭火系统选型和灭火剂用量确定、消防供配电方式、火灾自动报警系统的硬件结构、软件设计、数据传输方式及联动控制设计中的逻辑编程、爆炸和火灾危险环境危险释放源等级确定和防爆区域等级范围的划分、爆炸危险区域电气设备的防爆结构选型、建、构筑物的防雷类别划分及采取的防雷、防静电措施等具体工程技术问题在深入分析研究后，提出了相应的解决措施。

The transmission grid of power system is used to connect power supply to load.

输电网在电力系统中担负着将电源与用户连接起来的任务。

This paper presents a novel application of high-power adjustable switching power supply design.

本文给出了一种新型大功率可调开关电源的应用设计。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷