变压器

Today, the two standard frequencies for generation, transmission, and distribution of electric power in the world are 60 Hz (in the United States, Canada, Japan, Brazil) and 50 Hz ( in Europe, the former Soviet republics, South America except Brazil, India, also Japan). The advantage of 60-Hz systems is that generators, motors, and transformers in these systems are generally smaller than 50-hz equipment with the same ratings. The advantage of 50-Hz systems is that transmission lines and transformers have smaller reactances at 50 Hz than at 60 Hz.

今天，60Hz(在美国，加拿大，日本和巴西使用)和50Hz(在欧洲，前苏联，除巴西以外的南美洲，印度以及日本使用)是世界上发电，输电和配电的两个标准频率。60Hz系统的优点在于系统中的发电机，电动机和变压器通常比同等级50Hz系统的设备小。50Hz系统的优点是传输线和变压器的电抗在50Hz时较60Hz时小。

The deterioration of voltage ratio may result in damage of transformer, which may also lead to the failures of power supply system.

变压比是变压器的重要参数，变压比的变化与变压器绕组的变化有密切的关系。

The deterioration of voltage ratio may result in damage of transformer, which may also lead to the failures of the power supply system.

变压比是变压器的重要参数，变压比的变化与变压器绕组的变化有密切的关系。

The results show that the maximum gradient voltage of 1 to 3 winding pies will exceed the critical value under the condition where the isolating switch operates in mode 3 and the transformer is charged.

结果表明，变压器带电、变压器侧的隔离开关操作(方式3)的1～3个线饼的最大梯度电压超过允许范围，因此要避免方式3的操作。

Before welding, based on the parameters which are set by custom the control software determine motion index points of different welding stages; in the welding process, the control software collect the motion of the moving bench, the current of voltage changer , the voltage of welding, and enter the corresponding welding stages based on the different motion index points.

焊接主电源部分在变压器初级使用晶闸管组进行调压，经过变压器降压和整流管三相全波整流，输出平稳的直流电压。

Companies rely on some of Xi'an University of Electronic Science and Technology professor, research institutes of technology support, long-term cooperation in research and development power automation, electrical testing, electrical testing equipment, including: Switching mechanical properties tester, vacuum tester, cable fault tester, cable test Management systems, cables altimeter instrument, relay calibrator, DC high-voltage generator, or flow, test transformers, DC Resistance Tester, loop resistance tester, and change than the group tester, MOA tester, Transformer test aircraft, dielectric loss tester, ground resistance tester, such as electric Zhaoou table.

公司依托西安电子科技大学部分教授，科研院所的科技支持，长期合作研发电力自动化、电力测试、电气试验仪器设备，包括：开关机械特性测试仪、真空度测试仪、电缆故障测试仪、电缆测试管理系统、电缆测高仪、继电保护校验仪、直流高压发生器、升流器、试验变压器、直流电阻测试仪、回路电阻测试仪、变比组别测试仪、氧化锌避雷器测试仪、变压器试油机、介质损耗测试仪、接地电阻测试仪、电动兆欧表等。

Hence, the on-line monitoring of moisture in transformer oil is of great significance to the operation safety of transformers.

因此，对变压器油中微水含量实施在线监测对变压器设备的安全可靠运行具有十分重要的意义。

Methane is a characteristic gas dissolved in transformer oil, which can be used in the early transformer fault diagnosis.

甲烷(CH4)是变压器油中溶解的一种可用于变压器早期故障诊断的特征气体。

At present, there are many methods for transformer fault diagnosis based on DGA. In this paper, fuzzy cluster analysis is introduced in analyzing the chromatographic data of transformer oil, and existing problems of this method are discussed.

目前基于溶解气体分析的变压器故障诊断方法有很多，本文尝试将模糊聚类分析方法应用到变压器油色谱数据的分析中来，并针对该方法在实际应用中存在的问题进行了分析讨论。

According to the type and content of gas dissolved in transformer oil, it is easy to conclude the internal insulation faulty of transformer.

变压器油中溶解气体的成分和含量则能有效体现运行变压器内部的绝缘故障情况。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。