JPS57114910A - Group controlling system - Google Patents

Group controlling system

Info

Publication number
JPS57114910A
JPS57114910A JP92281A JP92281A JPS57114910A JP S57114910 A JPS57114910 A JP S57114910A JP 92281 A JP92281 A JP 92281A JP 92281 A JP92281 A JP 92281A JP S57114910 A JPS57114910 A JP S57114910A
Authority
JP
Japan
Prior art keywords
contact
closed
coil
flow
motor
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
JP92281A
Other languages
Japanese (ja)
Inventor
Akira Meguro
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.)
Hitachi Plant Construction Co Ltd
Hitachi Plant Technologies Ltd
Original Assignee
Hitachi Plant Construction Co Ltd
Hitachi Plant Technologies 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 Hitachi Plant Construction Co Ltd, Hitachi Plant Technologies Ltd filed Critical Hitachi Plant Construction Co Ltd
Priority to JP92281A priority Critical patent/JPS57114910A/en
Publication of JPS57114910A publication Critical patent/JPS57114910A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D7/00—Control of flow
    • G05D7/06—Control of flow characterised by the use of electric means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Flow Control (AREA)
  • Feedback Control In General (AREA)

Abstract

PURPOSE:To improve the control characteristics, by avoiding a control value from a supply detecting means from being operated for a specified time and giving a specified control value after a prescribed time, at the switching of supply device through the amount of control request. CONSTITUTION:When an amount of flow required for operation for one set's share out of a pump group is detected with a flow detector (not shown), a contactor 41 is closed. Then, an electromagnetic relay coil 33B is excited, a relay contact 33A is closed, a power is supplied to a motor 40A from a power supply 31 and a pump driven with this motor 40A is actuated. Next, when a flow gradually increases and the flow for 2 sets' share is detected, a contactor 42 is closed. Then, an electromagnetic coil 34B is excited and a contact 34A is closed. In this case, a contact 44A is opened with the excitation of the coil 34B and a contact 44B is closed. Since no power is applied to the coil 33B, the contact 33A is opened. The motor 40A is not stopped through the closed contact 33A even with disconnected contact 33A.
JP92281A 1981-01-07 1981-01-07 Group controlling system Pending JPS57114910A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP92281A JPS57114910A (en) 1981-01-07 1981-01-07 Group controlling system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP92281A JPS57114910A (en) 1981-01-07 1981-01-07 Group controlling system

Publications (1)

Publication Number Publication Date
JPS57114910A true JPS57114910A (en) 1982-07-17

Family

ID=11487173

Family Applications (1)

Application Number Title Priority Date Filing Date
JP92281A Pending JPS57114910A (en) 1981-01-07 1981-01-07 Group controlling system

Country Status (1)

Country Link
JP (1) JPS57114910A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS543595B2 (en) * 1973-03-20 1979-02-24

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS543595B2 (en) * 1973-03-20 1979-02-24

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