产品详细资料
本节包含配置差分元件百分比的设置,包括所有相关的谐波抑制功能。745提供了三个独立的谐波抑制功能:谐波抑制,它实现了一种基于2次或2+5次谐波的抑制方案,该方案始终处于“电路中”;通电抑制,允许在通电期间改变抑制方案的特性,以提高可靠性;和5TH HARM INHIBIT,它仅基于5次谐波实现抑制方案,允许在系统有意过励磁期间抑制差分百分比。本节包含配置差分百分比元件的设置。差动元件的百分比斜率特性的主要目的是防止在外部故障期间由于CT之间的不平衡而导致误操作。这些不平衡是由以下因素引起的:•CT比率不匹配(不是一个因素,因为745自动纠正了这种不匹配)•导致动态变化的CT不匹配的有载分接开关•CT精度误差•CT饱和百分比差动元件的基本工作原理可通过下图及其相关说明方程:约束电流计算已从平均值更改为大值,以在外部故障期间提供更好的安全性。
This section contains the settings to configure the percent differential element, including all associated harmonic inhibit features. The 745 provides three independent harmonic inhibit features: HARMONIC INHIBIT, which implements an inhibit scheme based on 2nd or 2nd + 5th harmonic which is ‘in-circuit’ at all times; ENERGIZATION INHIBIT, which allows changing the characteristics of the inhibit scheme during energization to improve reliability; and 5TH HARM INHIBIT, which implements an inhibit scheme based on 5th harmonic only, allowing inhibiting the percent differential during intentional overexcitation of the system.This section contains the settings to configure the percent differential element. The main purpose of the percent-slope characteristic of the differential element is to prevent maloperation because of unbalances between CTs during external faults. These unbalances arise as a result of the following factors: • CT ratio mismatch (not a factor, since the 745 automatically corrects for this mismatch) • "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。
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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