Undervoltage ( Voltage Drop ) . Modification of Low Dropout Regulator in VLSI Chip

欠 电压（电压降低）。超大规模集成芯片中低压差稳压电路的改进

Based on deep research and analysis of detailed situation the best way to solve undervoltage problem at customer side is to take the measures purposely thus will get good results .

解决用户端 电压 低的问题要在深入调研具体分析的基础上有针对性地采取措施才能有好的效果。

Instantaneous undervoltage occurred in power supply system of lubricant pump which caused easily breakdown of large scale machine set .

润滑油泵供电系统发生瞬时 欠 压，极易引起大型机组停运。

Undervoltage problems often appear at some buses in regional isolated grids . If the problems are not treated in time the voltage keep being under low level can cause voltage instability and will even lead to voltage collapse with great loss .

地区电网孤网运行时，部分节点常会出现 低压问题，若不及时处理，电压持续偏低，将可能引起电压失稳，严重时会导致电压崩溃，损失不可估量。

Study of undervoltage load shedding schemes

低压减载方案研究综述

In order to prevent the undervoltage or overvoltage of the batteries the protection circuit was designed .

为防止蓄电池 欠过压，还对 相应的保护电路进行了设计。

Then also designed undervoltage protection circuit and Clock Generation Circuit .

接着还设计了 欠 压保护电路和时钟产生电路。

A study on a undervoltage load shedding strategy based minimum mismatch function

基于最小不匹配函数的 低压减载算法研究

Undervoltage on Line and Equipment and Their Protection

线路和设备的 欠 电压与保护

It is necessary to prevent induction motors against overload and undervoltage .

必须保护感应电动机，防止过载和 欠 压。

It can provide protection in such cases as overload short circuit electricity leakage insulation monitoring overvoltage undervoltage three-phase imbalance etc. ;

具有过载、短路、漏电、绝缘监视、过压、 欠 压、三相不平衡等多种保护功能；

An undervoltage tripper is a very popular electrical protection device for universal breaker which will directly affect the normal operation of a breaker if it breaks down .

欠 电压脱扣器在万能式断路器上是十分常见的一件电压保护装置，该装置的失效直接影响到断路器的正常运行。

The undervoltage function is used for asynchronous motors and pumped-storage stations and prevents the voltage-related instability of such machines .

欠 压功能用于异步电机和抽水蓄能基站，预防这类机器的相关电压不稳定性。

Application of Undervoltage Load Shedding Procedure in North China Power Grid

低 电压 切负荷措施在华北电网的应用

Any LED system should be able to appropriately track overvoltage undervoltage short circuit open circuit and thermal runaway conditions .

任何LED系统都应当能够适度跟踪过高、 欠 压、短路、开路和热逃逸等问题。

Malfunction of undervoltage memory overcurrent protection device of DRS generator is analyzed in this paper and improvement countermeasures are put forward to eliminate incipient safety fault .

通过对DRS型发电机 低压记忆过流保护误动原因的分析，对保护原理提出改进措施，消除了装置的安全隐患。

Frequency measurement can be blocked by using an undervoltage stage .

可使用 欠 压阶段中断频率测量。

Plunger type undervoltage relay

活塞式 欠 电压继电器

Analysis of a Kind of Overvoltage or Undervoltage Protector and Its New Application

一种过压 欠 压保护器的分析及其新应用

Based on 0.6 μ m BiCMOS technology a high performance undervoltage lockout circuit ( UVLO ) without the reference voltage and comparator is designed .

基于0.6μMBiCMOS工艺设计了一种无需基准电压源和比较器的高性能 欠 压封锁电路（UVLO）。

Undervoltage ( Voltage Drop ) . Low pressure mold closing is standard .

欠 电压（电压降低）。低压开关模装置可保护模具的安全。

Undervoltage Load Shedding to Avoid Voltage Instability Considering Dynamic Load Model

考虑负荷动态的 低电压切 负荷

LT3466 is a full function dual step-up DC / DC converter specifically designed to drive up to20 white LEDs possessing the functions of soft-start open LED protection undervoltage lockout and so on .

LT3466是凌特公司生产的一款全功能双输出升压型DC/DC转换器，可驱动多达20个白光LED，并具有软启动、LED开路保护及 欠 压闭锁等功能。

Circuit breakers are used in the electrical power system to protect electrical power devices during failures caused by various breakdowns . It protects the equipment from being damaged under situations such as overload short-circuit undervoltage electric leakage and earthing .

断路器是在电力系统中用于对各种故障进行保护控制的一种开关电器，能够在电气设备遭受过载、短路、 欠 压、漏电和接地等故障时实施保护，使其免受损坏。

The proposed system employs LCD to display the real-time values of frequency voltage and current with AC sampling and what ′ s more it can make a sound-light alarming for overvoltage and undervoltage .

系统采用交流采样，并通过LCD显示器显示频率、电压、电流的实时值，在过压、 欠 压时，可以进行声光报警。

Undervoltage load shedding is one of the important means to prevent power system voltage instability .

低压减载是解决电力系统电压失稳的重要手段之一。

This paper presented an analytical basis and criterion for undervoltage load shedding ( UVLS ) in power systems .

在分析 低 电压 切负荷机理的基础上，提出了一种新的 低电压切负荷控制算法。

The experimental result shows that the motor start fast and smooth The controller immediately to protect the motor and control board when overcurrent undervoltage and overcurrent happen and control system meets the system design requirement .

实验结果表明，该电机驱动系统能够实现电机快速平稳启动，一旦出现过压、 欠 压、过流情况，控制器能即时保护电机和控制板，控制系统达到了设计要求。

Cause of the Undervoltage of 380 V Networks in Shanghai Rural Areas and Solving Measures

上海农村380V电网 电压 偏低原因及解决措施

There must be no undervoltage during the process .

处理过程中不得有 低 电压。