RADISYS PSBCCSM001数字量控制板卡

产品详细资料
1000/1的CT比率与250/1的比率并不完美匹配。高侧CT产生262.5/250=1.05A的二次电流，而低侧CT产生0.837A的电流。745自动将振幅校正因子应用于绕组2电流，以使其与绕组1电流相匹配。以下说明了如何计算校正系数：（EQ 7.5）因此，失配系数为：（EQ7.6）将绕组2的电流除以该系数，以获得差分元件的平衡条件。如果该变压器在线，满载，并由适当设置的745继电器保护，继电器读取的实际电流值为：•绕组1:262.5 A∠0°（这是参考绕组）•绕组2:836.8 A∠210°（变压器滞后30°，CT连接滞后180°）继电器。•每个绕组的负载应为额定负载的100%。上述结果可以用两个可调节的三相电流源进行验证。对于单个电流源，必须考虑继电器如何执行必要的相位角校正。表5-1:第5-13页的变压器类型显示，Y侧电流偏移30°，以匹配德尔塔二次侧。
The 1000/1 CT ratio is not a perfect match for the 250/1 ratio. The high-side CT produces a secondary current of 262.5/250 = 1.05 A whereas the low-side CT produces a current of 0.837 A. The 745 automatically applies an amplitude correction factor to the Winding 2 currents to match them to the Winding 1 currents. The following illustrates how the correction factor is computed: (EQ 7.5) The mismatch factor is therefore: (EQ 7.6) Winding 2 currents are divided by this factor to obtain balanced conditions for the differential elements. If this transformer were on line, fully loaded, and protected by a properly set 745 relay, the actual current values read by the relay would be: • Winding 1: 262.5 A ∠0° (this is the reference winding) • Winding 2: 836.8 A ∠210° (30° lag due to transformer and 180° lag due to CT connections) CT2( ) ideal CT1 V1 V2 ×  250 1 220 V 69 V  797.1 Ideal CT Ratio Actual CDifferential current: < 0.03 × CT as the two winding currents are equal once correctly transformed inside the relay. • The loading of each winding would be 100% of rated. The above results can be verified with two adjustable sources of three-phase current. With a single current source, how the relay performs the necessary phase angle corrections must be taken into account. Table 5–1: Transformer types on page 5–13 shows that the Yside currents are shifted by 30° to match the Delta secondary side.
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Read and strictly follow safety-related information before operatingmaintainingand installing equipment.

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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.

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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:

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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