RADISYS SBC486DX66电源模块

产品详细资料
引言对于变压器差动保护，有必要校正每个绕组的CT二次电流的大小和相位关系，以便在正常操作条件下获得接近零的差动电流。传统上，这是通过在变压器处插入CT或抽头继电器绕组和补偿CT连接来实现的。745通过将所有CT连接为Y形（极性标记指向远离变压器）简化了CT配置问题。所有相位角和幅值校正以及零序电流补偿都是根据用户输入的设定点自动执行的。本节通过一个具体的例子描述了自动配置的过程，展示了如何使用CT比率、变压器电压比率和变压器相移来生成校正因子。将这些校正因子应用于电流信号以获得极其的差分电流。考虑具有以下数据的典型Y形-三角形电力变压器：•连接：Y/d30°（即三角形绕组相位滞后相应的Y形绕组相位30°）•绕组1:100/133/166 MVA，220 kV标称，500/1 CT比•绕组2:100/133/166MVA，69 kV标称，1500/1 CT比率有载分接开关：61至77 kV，0.5 kV步进（33个分接位置）•辅助冷却：两级强制空气以下部分将使用此示例说明自动配置原理
Introduction For transformer differential protection, it is necessary to correct the magnitude and phase relationships of the CT secondary currents for each winding, in order to obtain near zero differential currents under normal operating conditions. Traditionally, this has been accomplished using interposing CTs or tapped relay windings and compensating CT connections at the transformer. The 745 simplifies CT configuration issues by having all CTs connected Wye (polarity markings pointing away from the transformer). All phase angle and magnitude corrections, as well as zero-sequence current compensation, are performed automatically based upon user entered setpoints. This section describes the process of auto-configuration by means of a specific example, showing how CT ratios, transformer voltage ratios, and the transformer phase shifts are used to generate correction factors. These correction factors are applied to the current signals to obtain extremely accurate differential currents. Consider a typical wye-delta power transformer with the following data: • Connection: Y/d30° (i.e. delta winding phases lag corresponding wye winding phases by 30°) • Winding 1: 100/133/166 MVA, 220 kV nominal, 500/1 CT ratio • Winding 2: 100/133/166 MVA, 69 kV nominal, 1500/1 CT ratio "font-style:normal">主营产品简介
专注于DCS、PLC、机器人控制系统、大型伺服四大系统领域。

主营产品各种模块/卡件，控制器，触摸屏，伺服驱动器。

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●使用前:

在操作和维护，安装设备之前，请阅读并严格遵守安全相关的信息。

Read and strictly follow safety-related information before operatingmaintainingand installing equipment.

●使用者要求:

必须从事安装，组装或维护设备等相关工控电气机械以及其他相关技术的人员。

Must be engaged in the installation,assembly or maintenance of equipment and other related industriacontroeectrica machinery and other related technica personne.应用范围:

应用于品牌本系列工业以及生产生活自动化设备产品。

Used in the brand of this series of industriaand production automation eauipment products

适用于场景:系统集成，非标定制，产线升级改造，原设备电气替换等等。

Suitable for scenarios:system integration,non-standard customizationproduction line upgrading and transformation,electrical replacement of original equipment,etc.

●操作人员:

应该由本品牌专业培训操作员来安装、操作和维修设备。专业人员具有技术能力强，熟悉安全信息和安全实施:

熟悉设备的安装加工、操作和维护:熟悉处理所有的潜在危险情况。

Equipment should be installed,operated and maintained by trained operators from the brand

●危险情况

警告

.请注意使用人员的人身安全。

●除了产品特性以及功能，还需了解产品的使用寿命环境。

●充分学习产品使用手册，否则非专业人员可能会造成人身危险。

Study the product instruction manual thoroughlyotherwise it may cause personal danger to non-professionals.

●服务行业

适用水泥，木业，石业，橡胶，石油，化工，发电，环保，水处理，制冷，交通，钢铁，食品，饮料，船舶，制冷等行业

Applicable to cementwood,stone,rubber,petroleumchemical, power generation