RCS-978变压器成套保护装置

介绍了ＲＣＳ－９７８数字式变压器成套保护装置的硬件组成，保护原理及功能，它集成了一台主变的全套电量保护，对每台主变采用双套主保护，双套后备保护的配置原则，可提高安全性和可靠性，装置中差动保护采用了独特的差动二次电流相位调整方法，可靠的励磁涌流及ＴＡ饱和判据，反时限过激磁保护的动作特性针对不同的变压器过励磁倍数曲线进行配合。主保护包括高灵敏度的工频变化量比率差动，稳态比率差动，差动速断、零序比率差动

RCS-978 DIGITAL TRANSFORMER PROTECTION SET

This paper introduces the hardware,principle and functions of RCS- 978digital transformer protection setdeveloped by NARI- RELAYS.It includes a set of all electrical protection of transformer.The principle of transformer protection, which configures duplicate sets of main protection and duplicate sets of back- up protection,is used.This supplies high security and reliability for transformer.The reliable principle of inrush and current transformer saturation and the new adjusting method of differential currentare applied in differential relay.The characteristic of over- excitation relay can adaptto various over- excitation characteristic of transformer.The main protection of RCS- 978includes fault component percentage differential relay,which has higher sensitivity,steady percentage differential relay,zero sequence percentage differential relay and over- excitation relay.The layout of back- up protection is flexible and perfect.Its tripping relay adopts mode of setting value.Besides,RCS- 978protection set has perfecteventrecording and printing functions and background software which has supervision,analysis and setting functions.