JPH0486047U - - Google Patents
Info
- Publication number
- JPH0486047U JPH0486047U JP12793790U JP12793790U JPH0486047U JP H0486047 U JPH0486047 U JP H0486047U JP 12793790 U JP12793790 U JP 12793790U JP 12793790 U JP12793790 U JP 12793790U JP H0486047 U JPH0486047 U JP H0486047U
- Authority
- JP
- Japan
- Prior art keywords
- ratio differential
- differential relay
- negative
- sequence current
- relay device
- 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.)
- Pending
Links
- 238000010586 diagram Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 1
Description
第１図はこの考案の一実施例による比率差動継
電装置の構成を示す図、第２図はこの考案により
改善される比率差動継電装置の動作特性を示す図
である。第３図、第４図は従来の比率差動継電装
置を示す図である。
図において、２１Ａ，２１Ｂは各々逆相電流検
出要素、２２は論理和回路、２３は論理積回路、
２４はこれらの要素及び比率差動要素４により構
成される比率差動継電装置。なお、図中、同一符
号は同一、又は相当部分を示す。
FIG. 1 is a diagram showing the configuration of a ratio differential relay device according to an embodiment of this invention, and FIG. 2 is a diagram showing the operating characteristics of the ratio differential relay device improved by this invention. FIGS. 3 and 4 are diagrams showing conventional ratio differential relay devices. In the figure, 21A and 21B are negative phase current detection elements, 22 is an OR circuit, 23 is an AND circuit,
24 is a ratio differential relay device constituted by these elements and the ratio differential element 4. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.
Claims (1)
る比率差動継電装置において、事故電流に逆相電
流が含まれている事を検出する逆相電流検出器を
抑制要素として装備していることを特徴とする比
率差動継電装置。 A ratio differential relay whose main function is to detect internal short-circuit faults in power supply equipment is equipped with a negative-sequence current detector as a suppressing element that detects the presence of negative-sequence current in the fault current. Characteristic ratio differential relay device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12793790U JPH0486047U (en) | 1990-11-28 | 1990-11-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12793790U JPH0486047U (en) | 1990-11-28 | 1990-11-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0486047U true JPH0486047U (en) | 1992-07-27 |
Family
ID=31875418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12793790U Pending JPH0486047U (en) | 1990-11-28 | 1990-11-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0486047U (en) |
-
1990
- 1990-11-28 JP JP12793790U patent/JPH0486047U/ja active Pending
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