公开(公告)号：US3890544A

公开(公告)日：1975-06-17

申请号：US46098874

申请日：1974-04-15

Applicant: ASEA AB

Inventor： CHAMIA MICHEL

IPC: H02H3/38 ,  H02H3/26

CPC classification number: H02H3/382

Abstract: For limiting the dynamic overreach in impedance relays, there is provided a first comparator for comparing the condition of two periodic alternating quantities which delivers a signal of a definite appearance when a primary condition is fulfilled, and a second comparator which delivers a signal when a secondary condition is fulfilled. The second condition is a limitation of the primary condition. The two comparators are connected to each other to transmit a tripping signal when the primary condition is fulfilled at two consecutive measuring opportunities and when the secondary condition is fulfilled at any measuring opportunity. The primary condition is theta 1

Abstract translation: 为了限制阻抗继电器中的动态超越，提供了一种第一比较器，用于比较当满足主要条件时传递明确外观的信号的两个周期性交变量的条件;以及第二比较器，当次级 条件得到满足。 第二个条件是主要条件的限制。 当在两个连续的测量机会满足主要条件并且在任何测量机会满足次要条件时，两个比较器彼此连接以发送跳闸信号。 主要条件是θ1