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。
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。
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。
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。
They produced a long metal wire four elements - the smallest of the superconductor are currently reported.
他们制作了四个分子长的金属线——目前有报道最小的超导体。
Another improvement, by the famed inventor Thomas Alva Edison (1847-1931) in 1874, was the Quadruplex system, which allowed for four messages to be transmitted simultaneously using the same wire.
另一项技术进步——四路系统，由著名发明家托马斯·阿尔瓦·爱迪生(Thomas Alva Edison, 1847- 1931)于1874年发明，它可以使四条信息在同一条电报线上同时传送。
An official described the compound as having "extraordinary" security measures, including two security gates and walls three to four meters high topped by barbed wire.
一位官员称那个建筑备有“特殊”的保安措施，其中包括两道安全门和三、四米高的围墙，上面设有铁丝网。
Each of the four cables contains 26,108 lengths of wire.
这四根缆索。每一根都包含有26,108根钢丝。
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。
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。
For added holding and pulling strength, drive four nails through the snake and the drilling line, and wrap the snake with soft wire and tape the entire length.
为了增添抗拉强度，在穿接绳器的部位，再钉四个钉子，然后用铁丝和胶带包起来。
Four, and then the (AC) region of the L, N access to the 220V power supply (2.5 of copper core wires), such as the installation position is low, the best grounding wire.
再将变压转换器的（AC）区域的L、N接入220V电源（2.5的铜芯电线），如安装位置较低，最好接上地线。
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。
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。
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。
应用推荐