JPS63164334U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案の一実施例を示す構成図、第２
図は従来の地絡方向継電器の構成図、第３図は説
明のための配電系統の等価図である。 １は零相電流の変化分検出手段、２は零相電圧
の変化分検出手段、３，４は変化分のレベル検出
部、５は位相判定部、６，７は論理積部。 Fig. 1 is a configuration diagram showing one embodiment of the present invention;
The figure is a configuration diagram of a conventional ground fault directional relay, and FIG. 3 is an equivalent diagram of a power distribution system for explanation. Reference numeral 1 denotes means for detecting a change in zero-sequence current, 2 means for detecting a change in zero-phase voltage, 3 and 4 level detection parts for the change, 5 a phase determination part, and 6 and 7 logical product parts.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 電力系統に発生した零相電圧、零相電流の各変
化を夫々変化分検出手段にて検出し、検出された
各信号をトリガ信号印加時に夫々レベル検出部お
よび位相判定部に出力し、これら各レベル検出部
、位相判定部の出力論理積成立時に動作出力を発
生するようにしたものにおいて、前記トリガ信号
としや断器の投入条件信号との論理積信号を前記
各変化分検出手段に印加するよう構成したことを
特徴とする地絡方向継電器。 Each change in the zero-sequence voltage and zero-sequence current that occurs in the power system is detected by the change detection means, and each detected signal is output to the level detection section and the phase judgment section, respectively, when a trigger signal is applied. An operation output is generated when the output logical product of the level detection section and the phase determination section is established, wherein an AND signal of the trigger signal and the closing condition signal of the shimmer breaker is applied to each of the change detection means. A ground fault directional relay characterized by being configured as follows.