JPH0210739U - - Google Patents
Info
- Publication number
- JPH0210739U JPH0210739U JP8612688U JP8612688U JPH0210739U JP H0210739 U JPH0210739 U JP H0210739U JP 8612688 U JP8612688 U JP 8612688U JP 8612688 U JP8612688 U JP 8612688U JP H0210739 U JPH0210739 U JP H0210739U
- Authority
- JP
- Japan
- Prior art keywords
- input
- receives
- shift circuit
- ground fault
- phase
- 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
- 230000010363 phase shift Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Locating Faults (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Description
第1図はこの考案の実施例を示す回路図、第2
図は従来例の回路図である。
1…フイルター、2,4…増幅器、3…移相回
路、5…判別部、7…動作テストスイツチ、8…
発振器。
Figure 1 is a circuit diagram showing an embodiment of this invention, Figure 2 is a circuit diagram showing an embodiment of this invention.
The figure is a circuit diagram of a conventional example. DESCRIPTION OF SYMBOLS 1... Filter, 2, 4... Amplifier, 3... Phase shift circuit, 5... Discrimination part, 7... Operation test switch, 8...
oscillator.
Claims (1)
ーと、零相電圧を入力とし、位相特性を求めるた
めの移相回路と、前記フイルター、移相回路から
の出力を増幅する増幅器と。前記各増幅器からの
出力を入力とし、レベル、地絡方向を判定する判
定部を備えた地絡方向継電器において、 直流電源を動作電源とする発振器を設け、前記
発振器から発振される交流信号を、前記フイルタ
ー、移相回路に動作テスト用の模擬信号としてな
る地絡方向継電器用テスト装置。[Claims for Utility Model Registration] A noise removal filter that receives a zero-phase current as an input, a phase shift circuit that receives a zero-phase voltage as an input and determines phase characteristics, and outputs from the filter and the phase shift circuit. and an amplifier to amplify. A ground fault direction relay that receives outputs from each of the amplifiers as input and includes a determination unit that determines the level and direction of a ground fault, wherein an oscillator that uses a DC power source as an operating power source is provided, and an AC signal oscillated from the oscillator is A test device for a ground fault directional relay that serves as a simulated signal for testing the operation of the filter and phase shift circuit.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8612688U JPH0210739U (en) | 1988-06-29 | 1988-06-29 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8612688U JPH0210739U (en) | 1988-06-29 | 1988-06-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0210739U true JPH0210739U (en) | 1990-01-23 |
Family
ID=31310771
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8612688U Pending JPH0210739U (en) | 1988-06-29 | 1988-06-29 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0210739U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52107581A (en) * | 1976-03-05 | 1977-09-09 | Takaoka Electric Mfg Co Ltd | Rotary switch |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5656117A (en) * | 1979-10-13 | 1981-05-18 | Meidensha Electric Mfg Co Ltd | Circuit for inspecting operation of relay |
-
1988
- 1988-06-29 JP JP8612688U patent/JPH0210739U/ja active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5656117A (en) * | 1979-10-13 | 1981-05-18 | Meidensha Electric Mfg Co Ltd | Circuit for inspecting operation of relay |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52107581A (en) * | 1976-03-05 | 1977-09-09 | Takaoka Electric Mfg Co Ltd | Rotary switch |
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