JPS5953637U - Phase loss relay - Google Patents
Phase loss relayInfo
- Publication number
- JPS5953637U JPS5953637U JP14846882U JP14846882U JPS5953637U JP S5953637 U JPS5953637 U JP S5953637U JP 14846882 U JP14846882 U JP 14846882U JP 14846882 U JP14846882 U JP 14846882U JP S5953637 U JPS5953637 U JP S5953637U
- Authority
- JP
- Japan
- Prior art keywords
- phase
- output
- positive
- signal
- negative
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来例を示すブロック図、第２図〜第６図はそ
の原理を説明する図、第７図は本考案の一実施例図、第
８図〜第１１図はその説明図である。
図において、１は変流器ＩＡ、 ＩＢ、 ＩＣ，２
は正負判別回路、２Ａ、２Ｂ、２Ｃ，３は位相差検出回
路、３Ａ１．３Ｂ１，３Ｃ１はアンドゲート、３Ａ２．
３Ｂ２．３Ｃ２はノット素子、４は欠相検出回路、５は
出力回路である。なお、図中同一符号は同−又は相当部
分を示す。
Ｂ
Ｅ □Figure 1 is a block diagram showing a conventional example, Figures 2 to 6 are diagrams explaining its principle, Figure 7 is a diagram of an embodiment of the present invention, and Figures 8 to 11 are illustrations thereof. be. In the figure, 1 is current transformer IA, IB, IC, 2
2A, 2B, 2C, 3 are phase difference detection circuits, 3A1.3B1, 3C1 are AND gates, 3A2.
3B2.3C2 is a knot element, 4 is an open phase detection circuit, and 5 is an output circuit. Note that the same reference numerals in the figures indicate the same or equivalent parts. B E □
Claims (1)
り負荷電流の正負を判別する正負判別回路と、その正負
判別回路の各相信号より各相の位相差を検出する位相差
検出回路と、位相差検出回路の出力信号より欠相状態を
判別し、欠相トリップ信号を出力する欠相検出回路と、
前記欠相トリップ信号によって駆動し負荷の保護動作を
行う欠相リレーにおいて、前記位相差検出回路の出力は
、第１、゛ 第２、第３の出力をもっており、第１の出
力は第１相の正信号と第２相、第３相の負信号の論理積
出力であり、第２の出力は第２相の正信号と第１、
相、第３相の負信号の論理積出力であり、第３の出力は
第３相の正信号と第１相、第２相の負信号の論理積出力
であることを特徴とする欠相リレー。゛ A current transformer that detects the three-phase load current, a positive/negative discrimination circuit that discriminates whether the load current is positive or negative from the current transformer output, and a phase difference detection that detects the phase difference between each phase from each phase signal of the positive/negative discrimination circuit. a circuit, and an open phase detection circuit that determines an open phase state from the output signal of the phase difference detection circuit and outputs an open phase trip signal;
In the phase loss relay that is driven by the phase loss trip signal and performs a load protection operation, the output of the phase difference detection circuit has first, second, and third outputs, and the first output is connected to the first phase. The second output is the AND output of the positive signal of the second phase and the negative signals of the second and third phases.
Phase loss is an AND output of negative signals of the third phase and the third phase, and the third output is an AND output of the positive signal of the third phase and the negative signals of the first and second phases. relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14846882U JPS5953637U (en) | 1982-09-30 | 1982-09-30 | Phase loss relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14846882U JPS5953637U (en) | 1982-09-30 | 1982-09-30 | Phase loss relay |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5953637U true JPS5953637U (en) | 1984-04-09 |
| JPS6226997Y2 JPS6226997Y2 (en) | 1987-07-10 |
Family
ID=30329854
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14846882U Granted JPS5953637U (en) | 1982-09-30 | 1982-09-30 | Phase loss relay |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5953637U (en) |
-
1982
- 1982-09-30 JP JP14846882U patent/JPS5953637U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6226997Y2 (en) | 1987-07-10 |
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