JPS54115747A - Phase-inversion protective equipement for ac three-phase load - Google Patents

Phase-inversion protective equipement for ac three-phase load

Info

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
Application number
JP2383478A
Other languages
Japanese (ja)
Other versions
JPS6137848B2 (en
Inventor
Tsuyoshi Hokutou
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shimadzu Corp
Original Assignee
Shimadzu Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shimadzu Corp filed Critical Shimadzu Corp
Priority to JP2383478A priority Critical patent/JPS54115747A/en
Publication of JPS54115747A publication Critical patent/JPS54115747A/en
Publication of JPS6137848B2 publication Critical patent/JPS6137848B2/ja
Granted legal-status Critical Current

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
JP2383478A 1978-02-28 1978-02-28 Phase-inversion protective equipement for ac three-phase load Granted JPS54115747A (en)

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)

Also Published As

Publication number Publication date
JPS6137848B2 (en) 1986-08-26

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