JPS5857236U - Earth fault protection device - Google Patents
Earth fault protection deviceInfo
- Publication number
- JPS5857236U JPS5857236U JP15006481U JP15006481U JPS5857236U JP S5857236 U JPS5857236 U JP S5857236U JP 15006481 U JP15006481 U JP 15006481U JP 15006481 U JP15006481 U JP 15006481U JP S5857236 U JPS5857236 U JP S5857236U
- Authority
- JP
- Japan
- Prior art keywords
- ground fault
- zero
- protection device
- detection device
- instrument transformer
- 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
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図は従来の保護装置のブロック図、第２図は本考案
の一実施例を示すブロック図、第３図ａ。
ｂは本考案のしゃ断器引き外し条件を示す説明図である
。
１・・・主変圧器、２・・・しゃ断器、３・・・接地形
計器用変圧器（ＧＰＴ）、４・・・接地形計器用変圧器
２次接続負荷、５・・・電流制限抵抗器、６・・・地絡
過電圧継電器、７・・・タイマー、８・・・接地形計器
用変圧器２次電路、９・・・零相電流検出装置、１０・
・・零相電圧検出装置、１１・・・判別装置、１２・・
・主回路、１３・・・主回路側負荷、１４・・・ケーブ
ルヘッド、１５・・・変流器、１６・・・しゃ断器引き
外し、１７・・・しゃ断器引き外しロック。FIG. 1 is a block diagram of a conventional protection device, FIG. 2 is a block diagram showing an embodiment of the present invention, and FIG. 3a. b is an explanatory diagram showing the breaker tripping conditions of the present invention. 1... Main transformer, 2... Breaker, 3... Grounded instrument transformer (GPT), 4... Grounded instrument transformer secondary connection load, 5... Current limiter Resistor, 6... Earth fault overvoltage relay, 7... Timer, 8... Grounding instrument transformer secondary circuit, 9... Zero-phase current detection device, 10.
... Zero-phase voltage detection device, 11... Discrimination device, 12...
- Main circuit, 13... Main circuit side load, 14... Cable head, 15... Current transformer, 16... Breaker tripping, 17... Breaker tripping lock.
Claims (1)
、この接地形計器用変圧器の３次端子に地絡過電圧継電
器を接続してなる地絡保護装置、及び前記接地形計器用
変圧器の３次端子及び系統、 主回路に設置した変流
器の２次端子に地絡方向継電器を接続してなる地絡保護
装置において、前記接地形計器用変圧器の３次巻線端子
に接続する零相電圧検出装置と、１次中性線に設けた零
相電流検出装置を備え、前記零相電圧検出装置と零相電
流検出装置から出力する信号を入力する判別装置を設け
、系統主回路側にて生ずる地絡事故と、接地形計器用変
圧器２次側電路にて生ずる地絡事故左を判別する地絡保
護装置。A ground fault protection device comprising: grounding the neutral points of the primary and secondary windings of a grounding instrument transformer; and connecting a ground fault overvoltage relay to the tertiary terminal of the grounding instrument transformer; Tertiary terminal and system of grounded instrument transformer, in a ground fault protection device comprising a ground fault directional relay connected to the secondary terminal of a current transformer installed in the main circuit, A discrimination device that is equipped with a zero-sequence voltage detection device connected to the secondary winding terminal and a zero-sequence current detection device provided on the primary neutral wire, and inputs signals output from the zero-sequence voltage detection device and zero-sequence current detection device. A ground fault protection device that distinguishes between ground faults that occur on the system main circuit side and ground faults that occur on the secondary side circuit of a grounded instrument transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15006481U JPS5857236U (en) | 1981-10-12 | 1981-10-12 | Earth fault protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15006481U JPS5857236U (en) | 1981-10-12 | 1981-10-12 | Earth fault protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5857236U true JPS5857236U (en) | 1983-04-18 |
Family
ID=29942810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15006481U Pending JPS5857236U (en) | 1981-10-12 | 1981-10-12 | Earth fault protection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5857236U (en) |
-
1981
- 1981-10-12 JP JP15006481U patent/JPS5857236U/en active Pending
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