JPS54115747A - Phase-inversion protective equipement for ac three-phase load - Google Patents
Phase-inversion protective equipement for ac three-phase loadInfo
- Publication number
- JPS54115747A JPS54115747A JP2383478A JP2383478A JPS54115747A JP S54115747 A JPS54115747 A JP S54115747A JP 2383478 A JP2383478 A JP 2383478A JP 2383478 A JP2383478 A JP 2383478A JP S54115747 A JPS54115747 A JP S54115747A
- Authority
- JP
- Japan
- Prior art keywords
- phase
- capacitor
- relay
- output
- equipement
- 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.)
- Granted
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
PURPOSE: To achieve reduction of size by connecting a halfwave rectifier element and a filter respectively between one and other two lines of three-phase circuit and providing a DC relay having a parallel-connected capacitor across the output of said halfwave rectifier element.
CONSTITUTION: A filter comprising a resistor R and a capacitor C connected respectively in series with a diode D is connected between on line S' and other two lines R', T' of three-phase circuit while a DC relay RY connected in series with diode D3 and in parallel with capacitor C3 is connected across the output of diodes D1, D2 to function the main switch 2 through its contact 4. Since the output voltages from two filters are unbalanced, when the pahse is inverted, and the differential voltage produced at the output terminals 7, 9 of diodes D1, D2 is smoothed by the capacitor C3 to increase the average level, the relay RY is reliably energized to interrupt the main circuit.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2383478A JPS54115747A (en) | 1978-02-28 | 1978-02-28 | Phase-inversion protective equipement for ac three-phase load |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2383478A JPS54115747A (en) | 1978-02-28 | 1978-02-28 | Phase-inversion protective equipement for ac three-phase load |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54115747A true JPS54115747A (en) | 1979-09-08 |
JPS6137848B2 JPS6137848B2 (en) | 1986-08-26 |
Family
ID=12121409
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2383478A Granted JPS54115747A (en) | 1978-02-28 | 1978-02-28 | Phase-inversion protective equipement for ac three-phase load |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54115747A (en) |
-
1978
- 1978-02-28 JP JP2383478A patent/JPS54115747A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6137848B2 (en) | 1986-08-26 |
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