JPS5447975A - Control circuit - Google Patents
Control circuitInfo
- Publication number
- JPS5447975A JPS5447975A JP11463577A JP11463577A JPS5447975A JP S5447975 A JPS5447975 A JP S5447975A JP 11463577 A JP11463577 A JP 11463577A JP 11463577 A JP11463577 A JP 11463577A JP S5447975 A JPS5447975 A JP S5447975A
- Authority
- JP
- Japan
- Prior art keywords
- relay
- contact
- relays
- operated
- closing
- 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
Abstract
PURPOSE: To prevent a control circuit for producing a control command signal via contact operation from erroneously grounding by providing auxiliary relays at both sides of the contact to generate the signal under the simultaneous relay energization.
CONSTITUTION: A field contact 1 at a place such as a power plant or the like is connected between the auxiliary relay 5 for closing positive electrode P and the auxiliary relay 2 for closing negative electrode N. If it is grounded between the contact 1 and the relay 2, the latter is operated, but the relay 5 is not operated. As the grounding accident operates only one of the relays 2 and 5, a breaker tripping circuit 4 connects the normally open contacts 3, 6 of the relays 2, 5 respectively in series with each other. Since both the relays 2, 5 are operated without flowing an electric current through the relay circuits only when closing the contact 1, it can exactly prevent the erroneous operation of the control command
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11463577A JPS5447975A (en) | 1977-09-26 | 1977-09-26 | Control circuit |
JP61177506A JPS62188117A (en) | 1977-09-26 | 1986-07-30 | Controller |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11463577A JPS5447975A (en) | 1977-09-26 | 1977-09-26 | Control circuit |
JP61177506A JPS62188117A (en) | 1977-09-26 | 1986-07-30 | Controller |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5447975A true JPS5447975A (en) | 1979-04-16 |
Family
ID=47565441
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11463577A Pending JPS5447975A (en) | 1977-09-26 | 1977-09-26 | Control circuit |
JP61177506A Granted JPS62188117A (en) | 1977-09-26 | 1986-07-30 | Controller |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP61177506A Granted JPS62188117A (en) | 1977-09-26 | 1986-07-30 | Controller |
Country Status (1)
Country | Link |
---|---|
JP (2) | JPS5447975A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06349393A (en) * | 1993-06-04 | 1994-12-22 | Sony Tektronix Corp | Relay drive circuit |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5644255Y2 (en) * | 1977-03-01 | 1981-10-16 |
-
1977
- 1977-09-26 JP JP11463577A patent/JPS5447975A/en active Pending
-
1986
- 1986-07-30 JP JP61177506A patent/JPS62188117A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6352416B2 (en) | 1988-10-19 |
JPS62188117A (en) | 1987-08-17 |
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