JPS57161912A - Protection system for overvoltage - Google Patents

Protection system for overvoltage

Info

Publication number
JPS57161912A
JPS57161912A JP4593781A JP4593781A JPS57161912A JP S57161912 A JPS57161912 A JP S57161912A JP 4593781 A JP4593781 A JP 4593781A JP 4593781 A JP4593781 A JP 4593781A JP S57161912 A JPS57161912 A JP S57161912A
Authority
JP
Japan
Prior art keywords
voltage
circuit
overvoltage
itg
integral network
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
Application number
JP4593781A
Other languages
Japanese (ja)
Inventor
Michio Kono
Tomoo Suzuki
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP4593781A priority Critical patent/JPS57161912A/en
Publication of JPS57161912A publication Critical patent/JPS57161912A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
    • G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
    • G05F1/565—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor
    • G05F1/569—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor for protection
    • G05F1/571—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor for protection with overvoltage detector

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Voltage And Current In General (AREA)

Abstract

PURPOSE:To protect a momentary overvoltage, by inserting a circuit which clamps the voltage between output lines within an allowable range and measuring components of a rapid voltage fluctuation through an integral network and controlling a breaking circuit and etc. when the measured output is higher than a prescribed voltage. CONSTITUTION:both ends of a resistance element R are connected to a breaking circuit and alarm generating circuit BR through an integral network ITG. Though the voltage is clamped by a Zenr diode ZD and a current is flowed to the resistance R, the current due to the overvoltage state generated by a pulse noise disappears in moment. When the voltage across both ends of the resistance R detected through the integral network ITG continues for >=10ms, the circuit is in such true abnormal state that an alarm should be issued. Consequently, the breaking circuit and alarm generating circuit BR is operated by the outut signal of the integral network ITG. Thus, the output is intercepted to issue the alarm in the true abnormal state only by limiting the output voltage for a momentary overvoltage.
JP4593781A 1981-03-29 1981-03-29 Protection system for overvoltage Pending JPS57161912A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4593781A JPS57161912A (en) 1981-03-29 1981-03-29 Protection system for overvoltage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4593781A JPS57161912A (en) 1981-03-29 1981-03-29 Protection system for overvoltage

Publications (1)

Publication Number Publication Date
JPS57161912A true JPS57161912A (en) 1982-10-05

Family

ID=12733181

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4593781A Pending JPS57161912A (en) 1981-03-29 1981-03-29 Protection system for overvoltage

Country Status (1)

Country Link
JP (1) JPS57161912A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH039016U (en) * 1989-06-12 1991-01-29

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH039016U (en) * 1989-06-12 1991-01-29

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