The measurement system should allow for a four-wire measurement to be made.
测量系统应该支持四线测量模式。
Measurements made using the micro-ohmmeter are always performed using the four-wire technique in order to minimize errors caused by test leads and connections.
使用微欧计进行电阻测量必须采取四线技术以使测试电缆和连接器带来的误差减至最小。
For example, testing four-wire resistors may require four switch poles per resistor.
例如，测试4线电阻器时，则每个电阻器可能需要4个开关闸刀。
First of all, current detection method for three-phase four-wire system is researched.
首先，本文针对三相四线制的电流检测方法进行了研究。
To minimize measurement error due to channel resistance, use a four-wire switching circuit.
为使通道电阻引起的测量误差最小化，则采用4线切换电路。
It is sometimes difficult to make a four-wire connection to a device designed for just two wires.
设计成只有两条引线的器件有的时候很难进行四线连接。
To measure component values accurately, most testers can make two-wire, three-wire, or four-wire measurements.
为了使测试更加精确，很多测试设备可以构成两线、三线或四线测量。
A new DSP based hybrid power filter designed under the condition of three-phase four-wire system is presented.
介绍了一种基于DSP的三相四线制系统混合型电力滤波装置。
Especially three-phase four-wire active power filter hardware has simple structure with only three group switch device.
特别是三相四线制有源电力滤波器硬件结构简单，只有三组开关器件。
Moreover, three-phase four-wire active filters can suppress zero line current, and solve symmetric problem of system effectively.
另外，三相四线制有源电力滤波器能有效地抑制零线电流，并能有效地解决系统的不对称问题。
To help researching the lunar radio telescope, the transmission coefficient of odd mode four-wire transmission line transformer is derived.
本文为了配合月球射电仪天线的研究，推导了奇模四线传输线变压器的传输系数。
The experimental results indicate that this method can be used to detect the reactive power and harmonic current exactly in three-phase four-wire system.
通过试验验证，该检测方法能够很好的实现对三相四线制系统中的无功和谐波电流的检测。
This paper offers a better theory basis for improving compensation capability of the three-phase four-wire APF controlled by hysteresis current control strategy.
该文的理论推导和所得结论为改善三相四线并联apf应用电流滞环控制时的性能提供了较好的理论基础。
The solar cell module adopts four-wire connection. It uses high-speed data acquisition system. It ensures the accuracy of the current measurements of the solar cell.
太阳电池组件采用四线连接，以及高速数据采集系统，确保了太阳电池电流测量的准确性。
Notice that this is a two-wire resistance measurement compared to using the electrometer voltmeter and external current source, which can make a four-wire measurement.
注意，这种测量方法是两线电阻测量，而使用静电计电压表和外部电流源则可以进行四线测量。
The power supply of wastewater treatment is connected from the nearest access. Production electricity and lighting equipment adopt 380/220 three-phase four-wire power supply.
污水处理站供电由就近的生产接入，生产设备用电及照明采用380/220三相四线制供电。
The interpretation of active and reactive currents in non-sinusoidal and unbalanced three-phase four-wire systems is given based on the generalized instantaneous reactive power theory.
以通用瞬时无功功率理论为基础，阐述了电压不对称和非正弦条件时的有功和无功电流的物理意义。
In other words, the circuit may be physical two - wire (or even physical one - wire) and logical four - wire, performing as a four - wire circuit but employing fewer than four wires.
换句话说，电路可以是物理双线(甚至是物理单线)、逻辑四线，它使用较少的线实现四线电路。
The equipment should be placed on the ground without violent vibration or on the working stage and connected in the power grid of 380v with three phase and four wire.
设备应放置在无剧烈振动的地面或工作台上，接入三相四线380v的电网。
In fact, a four - wire circuit can be established without the use of any wires at all, as in the case with a circuit established over microwave, satellite, or infrared transmission systems.
事实上，可以不使用任何线来建立四线电路，例如通过微波、卫星或红外传输系统。
Although the absolute cost of four - wire circuits is higher than that of two - wire circuits, they offer considerably improved performance.
尽管四线电路的绝对成本高于双线电路，但它显著地改进了性能。
Experimental results prove the proposed control method can compensate the harmonic, negative sequence and zero sequence current components in the three phase four wire.
实验结果表明，该装置可对三相四线制系统中的谐波、负序、零序等电流分量进行补偿。
This paper introduces an active power filter device used for three phase four wire. The compensation principle and structure of main circuit and control circuit are given.
主要介绍用于三相四线制的有源电力滤波装置的研究工作，给出了系统的基本补偿原理、主电路及控制电路结构，并利用该装置进行了补偿实验。
Firstly, the existing methods of the three phase power measurement in the teaching materials are introduced. And then another three connection methods are suggested for three phase four wire circuits.
首先介绍了现有教材中已给出的三相电路功率的测量方法，进而提出了三相四线制三相电路功率测量的另三种接线方法。
Four speed segments, depending on the configuration of wire material specification, for reliable production of thick and thin wires.
速度可分四段，可依线材规格设定，使粗线、细线均能稳定生产。
Reinforcement: a braid of textile material over the inner tube and four spiral plies of heavy steel wire wrapped in alternating direction.
加强层：四层交互缠绕的高强度钢丝和包覆在内胶外的纤维编织层。
In 1874 he invented and sold to Western Union a system by which four messages could be sent over one wire at the same time, two in each direction.
1874年他发明并售给西联电讯公司一种装置，用了它可以在一根电线上拍发四份电报，即从每一方向可同时拍发两份电报。
In this paper, two types of main power circuits and their control methods are introduced when constructing active power filter in three phase four wire system.
本文介绍了在实现三相四线制有源电力滤波器时所采用的两种不同的主电路结构及其控制方法。
This paper presented the design idea of control system of a fully automatic four - wire feeding machine and gave the design principles diagram of software and hardware design.
本文提出了全自动四线喂线机控制系统的设计思路，给出了软件设计和硬件设计原理图。
The completion of the foundation buried stone heads, four measurements, a flat wire measurement, substandard level of measurement, map the root control field data collection and data editing.
完成了基础埋石、首级四等测量、一级平面导线测量、等外水准测量、图根控制等野外数据采集以及数据编辑工作。
应用推荐