JPS55138121A - Electric power switching unit - Google Patents

Electric power switching unit

Info

Publication number
JPS55138121A
JPS55138121A JP4526579A JP4526579A JPS55138121A JP S55138121 A JPS55138121 A JP S55138121A JP 4526579 A JP4526579 A JP 4526579A JP 4526579 A JP4526579 A JP 4526579A JP S55138121 A JPS55138121 A JP S55138121A
Authority
JP
Japan
Prior art keywords
power
load
temporary
long
output
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
JP4526579A
Other languages
Japanese (ja)
Inventor
Shigefumi Yasutomi
Kenjiro Tashiro
Kazuo Hashimoto
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.)
Kajima Corp
Original Assignee
Kajima 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 Kajima Corp filed Critical Kajima Corp
Priority to JP4526579A priority Critical patent/JPS55138121A/en
Publication of JPS55138121A publication Critical patent/JPS55138121A/en
Pending legal-status Critical Current

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  • Control Of Voltage And Current In General (AREA)

Abstract

PURPOSE: To suppress working power to less than load power by feeding the power to only a load in temporary operation by opening a switch circuit on detecting the power feed of a power output circuit during the temporary operation of the load, and then by restarting the power supply to the load for a long period of time with the load stopped from operating.
CONSTITUTION: Power outputs 2, 3 are branched in parallel to power input 1 and power feed detecting circuit 4, detecting an AC current by coil 7, rectifies and amplifies the current and then supplies its output to control circuit 5. Here, when a load for temporary operation is not used, switch circuit 6 is closed without fail and power output 3 feeds power to a load in long-period operation. Once the temporary load is put into operation, the power feed of output 2 is detected to open circuit 6. Consequently, the power feed for the long-period operation is interrupted and at this time, the power is fed to only the load for the temporary operation; when the operation of this load stops, impulse generator 10 restarts operating and the power feed to the load for the long-period operation recovers automatically. Consequently, the working power can be suppressed to less than a contract demand by alternating the loads.
COPYRIGHT: (C)1980,JPO&Japio
JP4526579A 1979-04-16 1979-04-16 Electric power switching unit Pending JPS55138121A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4526579A JPS55138121A (en) 1979-04-16 1979-04-16 Electric power switching unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4526579A JPS55138121A (en) 1979-04-16 1979-04-16 Electric power switching unit

Publications (1)

Publication Number Publication Date
JPS55138121A true JPS55138121A (en) 1980-10-28

Family

ID=12714458

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4526579A Pending JPS55138121A (en) 1979-04-16 1979-04-16 Electric power switching unit

Country Status (1)

Country Link
JP (1) JPS55138121A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6081618A (en) * 1983-10-12 1985-05-09 Ricoh Co Ltd Load electric power control device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6081618A (en) * 1983-10-12 1985-05-09 Ricoh Co Ltd Load electric power control device
JPH0570165B2 (en) * 1983-10-12 1993-10-04 Ricoh Kk

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