JPS54135334A - Direct current ground fault detector - Google Patents
Direct current ground fault detectorInfo
- Publication number
- JPS54135334A JPS54135334A JP4303778A JP4303778A JPS54135334A JP S54135334 A JPS54135334 A JP S54135334A JP 4303778 A JP4303778 A JP 4303778A JP 4303778 A JP4303778 A JP 4303778A JP S54135334 A JPS54135334 A JP S54135334A
- Authority
- JP
- Japan
- Prior art keywords
- ground fault
- direct current
- relay
- incremental
- current power
- 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
PURPOSE: To miniaturize this device and to produce it at low cost without using relays for each direct current power source, by detecting ground fault by mounting a self-incremental device and one direct current ground fault relay to facilities provided with a plurality of direct current power sources.
CONSTITUTION: A self-incremental device M is installed among a plurality of direct current power sources P1-N1 ∼ Pn ∼ Nn and a direct current ground fault relay 64, and the change-over contacts M1c∼Mnc of each incremental location Mo∼Mn of the incremental device M are passed through bus bars PG1, NG1 for detecting ground fault and bus bars PG2, NG2 for discriminating ground fault and connected to the ground fault relay 64 through an auxiliary relay Xc. The incremental device M is made incremental by means of a control circuit formed by ground fault relay contacts, a time limit relay and the auxiliary relay, and the points of accidents are displayed by means of lamps LP. Thus, this device can be produced at low cost by small-sized parts because ground fault can be detected by means of one relay without using relays for each direct current power source.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4303778A JPS54135334A (en) | 1978-04-12 | 1978-04-12 | Direct current ground fault detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4303778A JPS54135334A (en) | 1978-04-12 | 1978-04-12 | Direct current ground fault detector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54135334A true JPS54135334A (en) | 1979-10-20 |
Family
ID=12652707
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4303778A Pending JPS54135334A (en) | 1978-04-12 | 1978-04-12 | Direct current ground fault detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54135334A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008102746A (en) * | 2006-10-19 | 2008-05-01 | Nohmi Bosai Ltd | Fire receiver |
-
1978
- 1978-04-12 JP JP4303778A patent/JPS54135334A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008102746A (en) * | 2006-10-19 | 2008-05-01 | Nohmi Bosai Ltd | Fire receiver |
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