RadiSys 61-0881-10调节器

产品详细资料
外部接地故障也会导致三角洲侧有带内接地组的变压器（以及同一侧的Y形连接CT）的差动元件误操作。传统上，这个问题是通过在CT电路中插入零序电流陷阱来解决的。745在计算差分电流时自动从所有delta绕组电流中去除零序电流。在没有零序电流源的情况下（例如，三角形绕组没有接地组），745有效地去除了任何东西。3.自耦变压器有一个内部三次绕组，为三次谐波电流提供路径并控制瞬态过电压。此外，许多双绕组Y型/Y型变压器具有三条腿的铁芯结构，迫使零序磁通进入变压器油箱，从而产生固有的德尔塔电路。在这两种情况下，初级绕组和次级绕组之间都存在零序阻抗。745消除了所有Y形/Y形和Y形/W形变压器绕组的零序电流，以防止这两种情况可能导致的继电器误操作
External ground faults also cause maloperation of the differential element for transformers having an in-zone grounding bank on the delta side (and the wye connected CTs on the same side). Traditionally, this problem is solved by inserting a zero-sequence current trap in the CT circuitry. The 745 automatically removes zerosequence current from all delta winding currents when calculating differential current. Where there is no source of zero-sequence current (e.g. delta windings not having a grounding bank), the 745 effectively removes nothing. 3. Autotransformers have an internal tertiary winding to provide a path for thirdharmonic currents and control transient overvoltages. Also, many two-winding wye/ wye transformers have a three-legged core construction that forces zero-sequence flux into the transformer tank, creating an inherent delta circuit. In both these cases, there is zero-sequence impedance between the primary and secondary windings. The 745 removes zero-sequence current from all wye/wye and wye/wye/wye transformer windings to prevent possible relay maloperations resulting from these two conditions
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