查询词典 breakdown voltage

Overvoltages are initially clipped by breakdown clamping until the voltage rises to the breakover level, which causes the devices to crowbar into a low-voltage on state.

保护器由一个匀称电压触发型双向交流二极管组成，过电压最初被弱钳位剪除址到电压上升至超过的级别，该级别会造成装置进入一个低电压开启状态。

"Exception No.1: A unit having resistive circuity , high-impedance winding , and the like , not subject to excessive secondary-voltage build-up in case of electrical breakdown during the test may be tested :"

"例外1：具有电阻性电路，高阻抗绕组以及类似物在测试时由于电击穿可能产生过高次级电压的电源单元，可以按下列方法试验："

After the reformation of grinding machine work safety credibility, he systems operation situation is good, the grinding precision is higher; Using the PLC control grinder movement, realized the grinder to start, the stop, the breakdown to stop, the emergency stop function, might cut grinder's control mode nimbly according to the movement request; Provides the overload, the underloading, breaks and the voltage is not balanced protects; The scene demonstration running status, realizes the intellectualized monitoring.

改造后的磨床工作安全可靠，系统运行情况良好，磨削精度更高；利用PLC控制磨床运行，实现了磨床启动、停止、故障停止、紧急停止的功能，可根据运行要求灵活切换磨床的控制方式；提供过载，轻载，断相和电压不平衡保护；现场显示运行状态，实现智能化监控。

By the theoretical analysis of the subminiature breakdown of full flow during the test of the variable pump of constant voltage,we can find the reason of the breakdown and take measure to fix it.

通过对恒压式变量泵在试验中出现全流量超小故障的理论分析，找出了故障原因，并有针对性地采取了排除措施，即(1)减小弹簧刚度，(2)弹簧材料改为高温稳定性较好的材料，并经48小时加载荷压缩处理，(3)在试验中严格控制零流量压力公差，使故障有效排除，从而从根本上解决了生产中的疑难问题。

This paper presents the following questions about earthing breakdown protection and optionality,connection of voltage transformer,the type-selecting of arrersters and cable after middle voltage system earths through low resistance .

主要介绍了中压系统中性点经低电阻接地后，中压系统接地故障保护的设置问题及上、下级选择性、电压互感器的接线、避雷器及电缆的选型

Stacked PIN diodes in parallel and series operate at a hold-off voltage of 8.0 kV,and the dV/dt is promoted from 2.4 kV/ns to 3.2 kV/ns. Delayed breakdown device ; PIN diode ; Delayed breakdown

因此在输入脉冲 dV/dt很快的情况下，二极管会产生很高的过压，这时空间电荷区的电场强度远远大于雪崩击穿的临界场强，电子和空穴的电离率非常高，导致二极管在很短的时间内击穿，这个现象被

Secondly, whole-chip ESD protection net is put forward. Input protection circuits, output protection circuits and circuits between high-voltage ground and low-voltage ground are decided on the base of structure and process of PDP drive chip. Moreover, the design of low-voltage VDD-to-VSS ESD protection circuits is detailed and the circuit is simulated with HSpice. Finally, the characteristic of high-voltage device after avalanche breakdown is simulated and analyzed with Tuprem-4 and MEDICI, and it is concluded that high-voltage device can stand high voltage and large current, so the low-voltage VDD-to-VSS ESD protection circuits can be applied to high-voltage VDD-to-VSS ESD protection.

随后提出PDP驱动芯片全芯片ESD保护网络的方案，并根据PDP驱动芯片的结构和制造工艺，介绍了输入部分、输出部分及高低压接口部分的ESD保护电路，然后重点分析了低压电源和地之间ESD保护电路的设计并用Hspice进行了模拟，最后使用Tuprem-4和MEDICI模拟了高压器件在雪崩击穿之后的电压电流和电场分布特性，得出高压器件本身可以承受一定的ESD脉冲，从而将低压电源和地之间的ESD保护电路应用到高压电源和地之间。

The frequency changer Surpasses the voltage fail safe is the frequencychanger middle DC voltage after achieved the degree of hazard adoptsprotective measures, this is a big flaw which the frequency changerdesigns, causes this breakdown reason in the frequency changer actualmovement many, may adopt the measure are also more, when processesthis kind of breakdown must analyze the clear breakdown reason, haspointed takes the corresponding measure to process.

变频器过电压故障保护是变频器中间直流电压达到危险程度后采取的保护措施，这是变频器设计上的一大缺陷，在变频器实际运行中引起此故障的原因较多，可以采取的措施也较多，在处理此类故障时要分析清楚故障原因，有针对性的采取相应的措施去处理。

The frequency changer Surpasses the voltage fail safe is the frequencychanger middle DC voltage after achieved the degree of hazard adoptsprotective measures, this is a big flaw which the frequency changerdesigns, causes this breakdown reason in the frequency changer actualmovement many, may adopt the measure are also more, when processesthis kind of breakdown must analyze the clear breakdown reason, haspointed takes the corresponding measure to process.

摘 要：摘要变频器过电压故障保护是变频器中间直流电压达到危险程度后采取的保护措施，这是变频器设计上的一大缺陷，在变频器实际运行中引起此故障的原因较多，可以采取的措施也较多，在处理此类故障时要分析清楚故障原因，有针对性的采取相应的措施去处理。关键词变频器电动机整流 Abstract ：The frequenc。。

If so, the following three conditions are not caused by outside: Enter the loop by a diode bridge rectifier breakdown; high-voltage electrolytic filter capacitor C5, C6 was the breakdown; inverter power switch Ql, Q2 damage.

若是，则不外如下三种情况造成：输入回路中某个桥式整流二极管被击穿；高压滤波电解电容C5、C6被击穿。；逆变功率开关管Ql、Q2损坏。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。