产品内容介绍
SCHENCK IPPC-9150T-T-N控制器
变压器差动保护T2WPDIF/T3WPDIF变压器差动保护、双绕组（T2WPDIF）和变压器差动保护，三绕组（T3WPDIF。该功能可提供多达三相电流输入组。所有电流输入均具有百分比偏置抑制特性，使IED适用于多断路器站布置中的双绕组或三绕组变压器。通常，短路故障电流非常大，即大大大于发电机额定电流。有可能在发电机中性点附近的相位之间发生短路，从而导致相对较小的故障电流。由于发电机励磁过低，故障电流也会受到限制。因此，发电机相间短路的检测应相对灵敏，能够检测到较小的故障电流。同样重要的是，发电机差动保护不会因外部故障而跳闸，因为大量故障电流从发电机流出。为了结合快速故障清除以及灵敏度和选择性，发电机差动保护通常是发电机相间短路的最佳选择。如果用于保护并联电抗器或小母线槽，发电机差动保护GENPDIF也非常适合快速、灵敏和选择性地清除故障。
设置设施包括
差动保护应用于电站内所有类型的电力变压器、带或不带有载分接开关的自耦变压器以及并联电抗器和本地馈线。对于严重贯通故障，包括自适应稳定功能。通过引入有载分接开关位置，可以将差动保护传感器设置为最佳灵敏度，从而以低故障水平覆盖内部故障。励磁涌流和过励磁电流分别包括稳定。在外部故障期间，还包括系统恢复浪涌和CT饱和的自适应稳定。包括一个高设置无限制差动电流保护元件，用于在高内部故障电流下进行超高速跳闸。其中包括一种基于对称元件理论的创新型灵敏差动保护元件。该元件提供了电力变压器绕组匝间故障的最佳可能覆盖范围。1Ph高阻抗差动保护HZPDIF当相关CT铁芯具有相同的匝数比和相似的磁化特性时，可以使用1Ph高阻抗差动保护（HZPDIF）功能。它通过接线、串联电阻器和安装在外部连接到IED的依赖电压的电阻器来利用外部CT电流总和。HZPDIF可用于保护发电机定子绕组、三通馈线或母线。六个单相功能块可用于两个三相区域母线保护。
Transformer differential protection T2WPDIF/T3WPDIF
The Transformer differential protection, two-winding (T2WPDIF) and Transformer differential protection, threewinding (T3WPDIF) are provided with internal CT ratio matching and vector group compensation and settable zero sequence current elimination. The function can be provided with up to three-phase sets of current inputs. All current inputs are provided with percentage bias restraint features, making the IED suitable for two- or three-winding transformer in multi-breaker station arrangements. Normally, the short circuit fault current is very large, that is, significantly larger than the generator rated current. There is a risk that a short circuit can occur between phases close to the neutral point of the generator, thus causing a relatively small fault current. The fault current can also be limited due to low excitation of the generator. Therefore, it is desired that the detection of generator phase-to-phase short circuits shall be relatively sensitive, detecting small fault currents.It is also of great importance that the generator differential protection does not trip for external faults, with large fault currents flowing from the generator. To combine fast fault clearance, as well as sensitivity and selectivity, the generator differential protection is normally the best choice for phase-to-phase generator short circuits. Generator differential protection GENPDIF is also well suited to generate fast, sensitive and selective fault clearance, if used to protect shunt reactors or small busduct.
The setting facilities cover
the application of the differential protection to all types of power transformers and autotransformers with or without load tap changer as well as shunt reactors and local feeders within the station. An adaptive stabilizing feature is included for heavy throughfaults.By introducing the load tap changer position, the differential protection pick-up can be set to optimum sensitivity thus covering internal faults with low fault level. Stabilization is included for inrush and overexcitation currents respectively. Adaptive stabilization is also included for system recovery inrush and CT saturation during external faults. A high set unrestrained differential current protection element is included for a very high speed tripping at a high internal fault currents. Included is an innovative sensitive differential protection element based on the theory of symmetrical components. This element offers the best possible coverage of power transformer windings turn to turn faults.1Ph High impedance differential protection HZPDIF The 1Ph High impedance differential protection (HZPDIF) function can be used when the involved CT cores have the same turns ratio and similar magnetizing characteristics. It utilizes an external CT current summation by wiring, a series resistor, and a voltage dependent resistor which are mounted externally connected to the IED. HZPDIF can be used to protect generator stator windings, teefeeders or busbars. Six single phase function blocks are available to allow application for two three-phase zones busbar protection.
产品优势
1：国外专业的供货渠道，具有价格优势
2：产品质量保证，让您售后无忧
3：全国快递包邮
4：一对一服务
公司主营范围简介
PLC可编程控制器模块，DCS卡件，ESD系统卡件，振动监测系统卡件，汽轮机控制系统模块，燃气发电机备件等，优势品牌：Allen Bradley、BentlyNevada、ABB、Emerson Ovation、Honeywell DCS、Rockwell ICS Triplex、FOXBORO、Schneider PLC、GE Fanuc、Motorola、HIMA、TRICONEX、Prosoft等各种进口工业零部件、欧美进口模块。
产品广泛应用于冶金、石油天然气、玻璃制造业、铝业、石油化工、煤矿、造纸印刷、纺织印染、机械、电子制造、汽车制造、塑胶机械、电力、水利、水处理/环保、锅炉供暖、能源、输配电等等
