JPS55121512A - Power unit - Google Patents

Power unit

Info

Publication number
JPS55121512A
JPS55121512A JP2834779A JP2834779A JPS55121512A JP S55121512 A JPS55121512 A JP S55121512A JP 2834779 A JP2834779 A JP 2834779A JP 2834779 A JP2834779 A JP 2834779A JP S55121512 A JPS55121512 A JP S55121512A
Authority
JP
Japan
Prior art keywords
constant voltage
output
voltage output
relay
load
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
JP2834779A
Other languages
Japanese (ja)
Inventor
Wasaburo Tanida
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.)
Tokico Ltd
Original Assignee
Tokico 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 Tokico Ltd filed Critical Tokico Ltd
Priority to JP2834779A priority Critical patent/JPS55121512A/en
Publication of JPS55121512A publication Critical patent/JPS55121512A/en
Pending legal-status Critical Current

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  • Continuous-Control Power Sources That Use Transistors (AREA)

Abstract

PURPOSE: To protect a load from an abnormal voltage by stopping the supply of a constant voltage output to the load by opening a switching circuit according to the result of a comparison between the output voltage of the switching circuit and a reference voltage.
CONSTITUTION: When AC power is applied to terminal 32, relay 44 is driven by a charging current to capacitor 43 only in start operation to make contact 54, thereby supplying the constant voltage output to terminal 69. Further, comparator 61 is applied with a divided voltage of the constant voltage output and a reference voltage across Zener diode 47 and when the constant voltage output is normal, relay 55 operates to make its contact 57. Similarly, relay 56 also operates to make its contact 58. Then when a short circuit is formed across a load to lower the constant voltage output, relays 55 and 56 are reset to break contacts 57 and 58. Furtheremore, if the constant voltage output would increase up to a high voltage, neither comparator 61 nor 64 generates any output and contacts 57 and 58 are similarly broken.
COPYRIGHT: (C)1980,JPO&Japio
JP2834779A 1979-03-12 1979-03-12 Power unit Pending JPS55121512A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2834779A JPS55121512A (en) 1979-03-12 1979-03-12 Power unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2834779A JPS55121512A (en) 1979-03-12 1979-03-12 Power unit

Publications (1)

Publication Number Publication Date
JPS55121512A true JPS55121512A (en) 1980-09-18

Family

ID=12246061

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2834779A Pending JPS55121512A (en) 1979-03-12 1979-03-12 Power unit

Country Status (1)

Country Link
JP (1) JPS55121512A (en)

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