介绍了后备阻抗保护对变压器绕组短路灵敏度很低。
It is described that the sensitivity of impedance back up protection for transformer wind short circuit is very low.
由于电弧电阻非线性、时变性、高阻的特点，使得常规原理馈线保护中的阻抗保护、电流速断保护往往不能正确动作。
For the arc resistance is nonlinear and high, the conventional feeder protections, such as impedance protection and current protection, maybe fail to trip off.
首先通过测量阻抗轨迹法对异相短路故障的测量阻抗的进行分析，得出牵引网发生异相高阻电弧短路故障时，常规原理的阻抗保护将拒动的结论。
Conventional impedance relay will refuse to trip according to an analysis of measuring impedance by means of impedance locus method when wrong-phase-coupling of traction power supply system occurs.
这个屏蔽由一个单位增益的低阻抗放大器(保护)驱动。
Now this shield is driven by a unity-gain, low impedance amplifier (Guard).
而保护意味着使用保持在与高阻抗电路相同电位的附加的低阻抗导体来阻止可能的干扰电压或电流。
Guarding implies the use of an added low impedance conductor, maintained at the same potential as the high impedance circuit, which will intercept any interfering voltage or current.
该保护端由一个单位增益的低阻抗放大器驱动。
This guard is driven by a unity-gain, low impedance amplifier.
以RADSS型母线差动保护为例，阐述了中阻抗型差动继电器的原理特点。
The Characteristic of middle impedance relay was elaborated, as an example of bus differential protection of RADSS type.
应采用双重绝缘或加强绝缘将由保护阻抗连接的各个部件隔开。
Parts connected by protective impedance shall be separated by double insulation or reinforced insulation.
阐述了大型电动机高阻抗差动保护原理及整定原则和整定实例。
This paper expatiates the principles, setting and application of high impedance differential protection in large motor with whole solid setting cases.
提出了一种基于阻抗相对变化的高压线路保护选相新原理，用作振荡期间的选相元件。
Based on the relative variation of impedance during power swing, a novel phase selector for high voltage transmission lines is proposed.
采用动电位极化曲线和电化学阻抗谱研究了吗啉多元胺在模拟混凝土空隙液及混凝土中对钢筋的保护作用。
Its inhibition effect was investigated by electrochemical polarization curve and electrochemical impedance spectroscopy both in simulated pore solution and in concrete.
偏移特性阻抗继电器常用于小电流或大电流接地系统中作为输电线路距离保护的测量元件。
LZ-22 partial impedance relay usually used as measuring element on distance protection of the line at small or big current power system.
电路是免受线保护的阻抗被举办的电压和当前瞬间和浪涌。
Circuitry is impedance protected from line conducted voltage and current transients and surges.
分析了CT匝[数]比误差对高阻抗差动保护的影响，并介绍了匝[数]比误差的测量方法。
The influence of CT turn ratio to high impedance differential protection is analyzed, and the method of measuring turn ratio error is also introduced.
阻抗测试结果显示，随着浸泡时间的延长，腐蚀产物在合金表面沉积，对基体金属具有一定的保护作用。
According to the electrochemical impedance spectroscopy results, the corrosion products plating on alloys surface are partly protective to the parent metal with immersion time.
对四边形和方向圆特性阻抗继电器躲线路最大潮流的能力进行了详细分析，提出了距离保护负荷限制电阻的整定原则和整定方法，并给出了整定建议值。
It puts forward the setting principle and method of load limiting resistor of backup distance protection and gives the propositional setting value of load limiting resistor.
所有的长类比痕迹是非常低的阻抗，和完全被借由用一个盾围住在4边上的痕迹在3尺寸方面保护。
All long analog traces are very low impedance, and are fully shielded in 3 dimensions by surrounding the trace on 4 sides with a shield.
计算结果表明，管线粗细和端接阻抗将明显影响屏蔽保护效果。
The calculation results show that the dimension of pipeline and grounding resistances will affect shielding effectiveness.
介绍了发电机失磁保护的现状以及常用的阻抗原理失磁保护方案。
The current situation of generator loss of excitation protection and the usual scheme of loss of excitation protection based on impedance principle are introduced.
模拟输入：DC额定电压为0-10，24伏直流保护，以最大限度，输入阻抗20千欧姆；
Analog Input: Rated for 0-10 Volts DC, protected to 24 Volts DC maximum, input impedance 20k ohms;
在电路板的两面敷铜形成保护环，可以在电路高阻抗节点周围转移漏电流(图3)。
Adding copper traces on both sides of the board to form guard rings around the circuit's high-impedance nodes diverts leakage currents (Figure 3).
对于后备保护装置防止高阻抗接地故障，将配置一只双极方向过电流继电器，同瞬时跳闸附件的时间成反比。
For backup protection against high resistive ground faults, there will be a dual polarized directional overcurrent relay, inverse time with instantaneous trip attachment.
打耐压前是要断开保护阻抗的。
Protective impedance and radio interference filters are disconnected before carrying out the tests.
在进行试验前，保护阻抗要从带电部件上断开。
Protective impedance is disconnected from live parts before carrying out the tests.
把距离保护测量元件划分为阻抗继电器与距离继电器两大类。
In this article, the measuring elements of distance relay are divided into two main sorts, which are impedance relay and distance relay.
TCSC的动态基频阻抗特性分析对研究含TCSC线路上的线路保护的特性具有重要意义。
The dynamic power frequency impedance of TCSC is of great importance to the analysis of protective relaying characteristics on transmission line with TCSC.
简单介绍了级间配合，抑制横向过电压的产生，以及接地阻抗的简单计算和正确选用等，以达到对电源系统的有效防雷保护。
The paper describes the coordination of the multi-grade surge protection, the suppression of the transfer over voltage, as well as the calculation a…
“发电厂并网运行安全性评价”要求验证低磁励限制与失磁保护的整定关系，在实际校核中，发现低磁励限制是在P-Q平面进行计算的，而阻抗型失磁保护是在R-X阻抗圆平面进行分析的。
Through check, it is found that minimum excitation limit is calculated in P-Q plane, while impedance type loss-of-field protection is analyzed in R-X plane.
高效修护作用，强化皮肤组织，增强皮肤的抗干扰、自我保护能力，从而有效地阻抗皮肤的衰老。
It can also highly repair skin, strengthen skin tissue, anti-irritation and self-protection capability of skin, thus effectively prevent skin aging.
高效修护作用，强化皮肤组织，增强皮肤的抗干扰、自我保护能力，从而有效地阻抗皮肤的衰老。
It can also highly repair skin, strengthen skin tissue, anti-irritation and self-protection capability of skin, thus effectively prevent skin aging.
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