水利翻译节选

Along with moving down of water tunnel, axis of diversion tunnel should be moved to that of the water tunnel as it was. As the elevation of the base plate of diversion tunnel is about 20m lower than that of the water tunnel, the increase of rock burial depth in the hole and the melioration of surrounding rock will be basically satisfied with the requirements of the constitution of diversion tunnel. It is mainly consisted with face slab, plinth, upstream steady protection area, upstream coverage area and other parts. All un-processed metal surface exposed in the air will be shined by sand blasting and printing with two layers of rust inhibiting primer (lead is prohibited), and the thickness of each paint film should not less than 50×10-6m and no less than 75×10-6m after completely dry of the final factory antirust painting. The condensation purpose surface should be painted with appropriate anti-condensation coating.

在引水隧洞下移后，将导流洞轴线移至原引水洞的轴线位置，由于导流洞底板高程较引水洞底板高程低约20m，洞室岩石埋深增加，洞室围岩岩体质量变好，可基本满足导流洞成洞。主要由面板、趾板及上游盖重区、上游铺盖区、等部分组成。所有暴露在大气中的未加工金属表面，用喷砂清理到发亮，并刷2层防锈底漆(不得含铅)，每层漆膜厚度不小于50×10-6m，而最后一道工厂防锈涂料完全干燥后，漆膜厚度不得小于75×10-6m，对受冷凝作用的表面应涂上合适的防结露涂层。

Standard paint sold by the seller also applied to various small ancillary equipments, such as small power motors, contactors, meters, pressure switches and similar small devices.

卖方的标准油漆也应适用于各种小的辅助设备，例如：小功率电动机、接触器、表计、压力开关和类似的小型设备。

The AVR using dual digital channel, with a micro-adjust and improvement characteristics of the generator transient stability. It has manual and automatic dual-channel and independent of each other, each channel could be shut down at any time for maintenance. The spare channel has the capacity of tracking each other thus to ensure bumpless transfer. Connection of AVR and DCS enables remote operation of the control room of the AVR.

AVR采用双通道数字式，具有微调节和提高发电机暂态稳定的特性。具有手动和双自动通道，各通道之间相互独立，可随时停用任一通道进行检修。各备用通道可相互跟踪，保证无扰动切换。AVR与DCS接口实现控制室内对AVR的远方操作。

Small current grounding line applied the principle of zero power direction, and it is calculated by five times of selected harmonic voltage, current or fundamental voltage and current, capacitor current of breakdown occurred is behind U0 90°, and the capacitor current leads U0 90° in the opposite case, the grounding line selection principle of the direction of the zero-sequence power is determined as such, and the accurate grounding line could be selected by this way.

小电流接地选线采用零序功率方向原理，可选五次谐波电压、电流或基波电压、电流计算，故障相的电容电流落后于U0 90°，而非故障相电容电流超前U0 90°，以此决定零序功率方向的接地选线原理，可准确的选出接地线路。