JPS6455001A - Main circuit protection system - Google Patents
Main circuit protection systemInfo
- Publication number
- JPS6455001A JPS6455001A JP20927987A JP20927987A JPS6455001A JP S6455001 A JPS6455001 A JP S6455001A JP 20927987 A JP20927987 A JP 20927987A JP 20927987 A JP20927987 A JP 20927987A JP S6455001 A JPS6455001 A JP S6455001A
- Authority
- JP
- Japan
- Prior art keywords
- breaker
- main circuit
- allowable value
- voltage
- circuit
- 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
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
PURPOSE:To prevent the application of abnormal voltage to a DC motor by opening a DC breaker when output voltage in excess of a permissible limit is detected prior to the constitution of a main circuit. CONSTITUTION:When an output operation dispatching 12 is outputted from an operation dispatcher 11, a comparison between a DC voltage detection signal 16 from a DC voltage detector 8 and an allowable value is made by a comparison logical operation circuit 17. Then, when the DC voltage detection signal 16 is less than the allowable value, a main circuit is formed by connecting a DC breaker 5 through a DC breaker closing command from the comparison logical operation circuit 17, and at the same time, a thyristor gate signal 14 is outputted from a phase control circuit 13. On one hand, in case of exceeding the allowable value, either a closing of the DC breaker 5 is prohibited, or the DC breaker 5 is opened by deciding that something is wrong with thyristor rectifier 4.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20927987A JPS6455001A (en) | 1987-08-25 | 1987-08-25 | Main circuit protection system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20927987A JPS6455001A (en) | 1987-08-25 | 1987-08-25 | Main circuit protection system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6455001A true JPS6455001A (en) | 1989-03-02 |
Family
ID=16570313
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20927987A Pending JPS6455001A (en) | 1987-08-25 | 1987-08-25 | Main circuit protection system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6455001A (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5088714A (en) * | 1973-12-14 | 1975-07-16 | ||
JPS6114837B2 (en) * | 1975-10-03 | 1986-04-21 | Necchi Spa |
-
1987
- 1987-08-25 JP JP20927987A patent/JPS6455001A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5088714A (en) * | 1973-12-14 | 1975-07-16 | ||
JPS6114837B2 (en) * | 1975-10-03 | 1986-04-21 | Necchi Spa |
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