JPH0288425U - - Google Patents
Info
- Publication number
- JPH0288425U JPH0288425U JP16624088U JP16624088U JPH0288425U JP H0288425 U JPH0288425 U JP H0288425U JP 16624088 U JP16624088 U JP 16624088U JP 16624088 U JP16624088 U JP 16624088U JP H0288425 U JPH0288425 U JP H0288425U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- circuit
- analog
- circuit breaker
- power supply
- 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
- 230000001681 protective effect Effects 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 1
Landscapes
- Emergency Protection Circuit Devices (AREA)
Description
第１図は本考案の一実施例の電鉄用交流保護継
電装置が用いられる過電流保護継電システムの系
統図、第２図は保護継電装置７の構成を示すブロ
ツク図、第３図は実効値演算用素子Ａの特性を説
明するためのグラフ、第４図は保護継電装置７が
有する時限特性を示すグラフ、第５図は過電流保
護継電装置７の過電流検出処理の動作を示すフロ
ーチヤートである。
２……交流遮断器、７……保護継電装置、１０
……入力回路、１１……制御回路、１２……出力
回路、１３……マルチプレクサ、１４……アナロ
グ／デジタル変換回路、１５……ＣＰＵ、ＣＴ１
〜ＣＴｎ……検出変流器、Ａ１〜Ａｎ……実効値
演算用素子。
Fig. 1 is a system diagram of an overcurrent protection relay system using an AC protection relay device for electric railways according to an embodiment of the present invention, Fig. 2 is a block diagram showing the configuration of the protection relay device 7, and Fig. 3 is a graph for explaining the characteristics of the effective value calculation element A, FIG. 4 is a graph showing the time limit characteristics of the protective relay device 7, and FIG. 5 is a graph for explaining the overcurrent detection process of the overcurrent protective relay device 7. This is a flowchart showing the operation. 2... AC breaker, 7... Protective relay device, 10
... Input circuit, 11 ... Control circuit, 12 ... Output circuit, 13 ... Multiplexer, 14 ... Analog/digital conversion circuit, 15 ... CPU, CT1
~CTn...detection current transformer, A1~An... element for effective value calculation.
Claims (1)
配電線および変電所内制御電源給電のための高圧
給電線（以下、給電線という）に流れる回路電流
を検出変流器によつて検出して、過電流検出時に
給電線に介在される遮断器に指令信号を出力し、
遮断器に開極動作を行なわせるようにした電鉄用
交流保護継電装置において、 前記変流器からのアナログ信号を入力し、実効
値に変換する複数の実効値演算用素子と、 前記複数の実効値演算用素子からの出力信号を
選択的に切り換えて順次出力する信号切換回路と
、 信号切換回路からのアナログ出力信号をデジタ
ル信号に変換するアナログ／デジタル変換回路と
、 前記アナログ／デジタル変換回路からの出力信
号に基づき所定の演算を行ない、この演算値が予
め定めた値以上のときに遮断器開極指令信号を出
力する処理回路とを備えたことを特徴とする電鉄
用交流保護継電装置。[Scope of Claim for Utility Model Registration] In a railway substation, a current transformer detects the circuit current flowing in electric cars, signal high-voltage distribution lines, and high-voltage power supply lines (hereinafter referred to as power supply lines) for supplying control power within the substation. When overcurrent is detected, a command signal is output to the circuit breaker interposed in the power supply line,
An AC protective relay device for electric railways that causes a circuit breaker to perform an opening operation, comprising: a plurality of effective value calculation elements that input an analog signal from the current transformer and convert it into an effective value; a signal switching circuit that selectively switches and sequentially outputs the output signal from the effective value calculation element; an analog/digital conversion circuit that converts the analog output signal from the signal switching circuit into a digital signal; and the analog/digital conversion circuit. AC protection relay for electric railways, characterized in that it is equipped with a processing circuit that performs a predetermined calculation based on the output signal from the circuit breaker and outputs a circuit breaker opening command signal when the calculated value is greater than or equal to a predetermined value. Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16624088U JPH0288425U (en) | 1988-12-21 | 1988-12-21 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16624088U JPH0288425U (en) | 1988-12-21 | 1988-12-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0288425U true JPH0288425U (en) | 1990-07-12 |
Family
ID=31453452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16624088U Pending JPH0288425U (en) | 1988-12-21 | 1988-12-21 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0288425U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012050302A (en) * | 2010-08-30 | 2012-03-08 | Toshiba Corp | Ac feeder cable overcurrent protection device |
| JP2019083634A (en) * | 2017-10-31 | 2019-05-30 | 株式会社日立製作所 | Abnormality detection device, abnormality detection method, and abnormality detection system |
-
1988
- 1988-12-21 JP JP16624088U patent/JPH0288425U/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012050302A (en) * | 2010-08-30 | 2012-03-08 | Toshiba Corp | Ac feeder cable overcurrent protection device |
| JP2019083634A (en) * | 2017-10-31 | 2019-05-30 | 株式会社日立製作所 | Abnormality detection device, abnormality detection method, and abnormality detection system |
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