ABB     RET670 1MRK002816-AB 母线差动保护 可通过内置的人机界面或个人计

RET670 1MRK002816-AB   母线差动保护

RET670 1MRK002816-AB可用于线路变压器组保护装置用于实现母线、支接回路和T型保护的差动三相版本的保护装置配备两个低阻抗差动保护区和四个或八个间隔的 CT输入单相版本的保护装置配备两个低阻抗差动保护区和十二个或二十四个单相CT 输入。每个保护方案通常需要三台保护装置，每一相一台可选用三种预配置方案一可以直接应用集保护、控制、监视于一体的智能化电子设备，RET670 1MRK002816-AB其强大的保护功能、灵活的保护配置和可扩展的硬件设计能满足用户的特定要求
两个低阻抗差动保护区具有:
RET670 1MRK002816-AB内部故障快速跳闸。典型动作时间为 12ms
对于 CT 重度饱和状态下的穿越故障和自动重合闸状态下 CT 磁芯中的大剩磁具有完全的稳定
RET670 1MRK002816-AB对 CT 要求很低，正确动作只需2ms内 CT 未饱和
对CT二次电路开路或短路的智能检测及其对差动保护区的闭锁可整定
可通过内置的人机界面或个人计

RET670 1MRK002816-AB can be used as a differential three-phase protection device for line transformer groups to achieve busbar, branch circuit, and T-type protection. The protection device is equipped with two low impedance differential protection zones and four or eight interval CT input single-phase versions. The protection device is equipped with two low impedance differential protection zones and twelve or twenty-four single-phase CT inputs. Each protection scheme usually requires three protection devices, and each phase can choose from three pre configured schemes. One can directly apply intelligent electronic devices that integrate protection, control, and monitoring. RET670 1MRK002816-AB's powerful protection function, flexible protection configuration, and scalable hardware design can meet the specific requirements of users
Two low impedance differential protection zones have:
RET670 1MRK002816-AB internal fault quick trip. Typical action time is 12ms
The maximum residual magnetism in the CT core is completely stable for crossing faults in CT heavily saturated states and automatic reclosing states
RET670 1MRK002816-AB has very low requirements for CT, and correct operation only takes 2 seconds for CT to be unsaturated
Intelligent detection of open or short circuits in CT secondary circuits and adjustable locking of differential protection zones
It can be accessed through the built-in human-machine interface or personal computer