JPS54162145A - Pilot wire monitor device - Google Patents
Pilot wire monitor deviceInfo
- Publication number
- JPS54162145A JPS54162145A JP7128178A JP7128178A JPS54162145A JP S54162145 A JPS54162145 A JP S54162145A JP 7128178 A JP7128178 A JP 7128178A JP 7128178 A JP7128178 A JP 7128178A JP S54162145 A JPS54162145 A JP S54162145A
- Authority
- JP
- Japan
- Prior art keywords
- pilot wire
- trouble
- power source
- currents
- case
- 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
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
PURPOSE: To positively discriminate the trouble of a pilot wire or the loss of a power source, by detecting difference between the decay time of reflux currents in the case when the pilot wire breaks and the decay time of reflux currents in the case when the power source for monitor losses by means of a current variation detector.
CONSTITUTION: Direct current currents produced by rectifying an alternating current power source 8 by means of a rectifier 10 are let flow back to a pilot wire 13 used for protecting a transmission line 1, the trouble of the pilot wire 13 detected by means of an over-and-under current relay 6 and a current variation detector 17 by the increase and decrease of the currents and an alarm is given. The time difference is detected by means of the current variation detector 17 by utilizing a fact that t2 is larger than t1 in the decay time t1 of reflux currents in the case when the pilot wire 13 breaks and the decay time t2 of reflux currents in the case when the alternating current power source 8 for monitoring the pilot wire losses. Thus, this device can positively monitor trouble because the trouble of the pilot wire 13 or the trouble of the alternating current power source 8 for monitor can easily be discriminated.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7128178A JPS54162145A (en) | 1978-06-12 | 1978-06-12 | Pilot wire monitor device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7128178A JPS54162145A (en) | 1978-06-12 | 1978-06-12 | Pilot wire monitor device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54162145A true JPS54162145A (en) | 1979-12-22 |
Family
ID=13456161
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7128178A Pending JPS54162145A (en) | 1978-06-12 | 1978-06-12 | Pilot wire monitor device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54162145A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104977546A (en) * | 2015-06-29 | 2015-10-14 | 广东电网有限责任公司江门供电局 | Secondary direct-current power source loss discriminating method for substations |
-
1978
- 1978-06-12 JP JP7128178A patent/JPS54162145A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104977546A (en) * | 2015-06-29 | 2015-10-14 | 广东电网有限责任公司江门供电局 | Secondary direct-current power source loss discriminating method for substations |
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