GB1032468A - A safety device for use for a three-phase electrical system - Google Patents

A safety device for use for a three-phase electrical system

Info

Publication number
GB1032468A
GB1032468A GB3316963A GB3316963A GB1032468A GB 1032468 A GB1032468 A GB 1032468A GB 3316963 A GB3316963 A GB 3316963A GB 3316963 A GB3316963 A GB 3316963A GB 1032468 A GB1032468 A GB 1032468A
Authority
GB
United Kingdom
Prior art keywords
energized
coil
relay
safety device
electrical system
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.)
Expired
Application number
GB3316963A
Inventor
Hiroyuki Takai
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.)
KITO SEISAKUSHO KK
Original Assignee
KITO SEISAKUSHO KK
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 KITO SEISAKUSHO KK filed Critical KITO SEISAKUSHO KK
Priority to GB3316963A priority Critical patent/GB1032468A/en
Publication of GB1032468A publication Critical patent/GB1032468A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
    • H02H11/004—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of incorrect phase sequence; with switching for obtaining correct phase sequence

Landscapes

  • Motor And Converter Starters (AREA)

Abstract

1,032,468. Control of A.C. motors. KITO SEISAKUSHO KABUSHIKI KAISHA. Aug. 21, 1963, No. 33169/63. Heading H2J. A safety circuit for starting a three-phase induction motor 3 in the correct direction comprises relay 2<SP>1</SP> for interchanging the supply connections to terminals Y, Z, the relay being de-energized or energized according to the phase sequence of the supply voltage. The coil 6 of the relay is energized by the vectorial sum of component voltages D, E, derived from phaseshifter R1, Co, and voltage divider R2, R3, respectively. In one condition, the voltages D, E, are balanced and the coil 6 is de-energized. With a different phase sequence, the coil 6 becomes energized to change-over the contacts C, C<SP>1</SP>. The circuit may be employed in a system for controlling a reversible motor for operating between limiting positions.
GB3316963A 1963-08-21 1963-08-21 A safety device for use for a three-phase electrical system Expired GB1032468A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3316963A GB1032468A (en) 1963-08-21 1963-08-21 A safety device for use for a three-phase electrical system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3316963A GB1032468A (en) 1963-08-21 1963-08-21 A safety device for use for a three-phase electrical system

Publications (1)

Publication Number Publication Date
GB1032468A true GB1032468A (en) 1966-06-08

Family

ID=10349451

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3316963A Expired GB1032468A (en) 1963-08-21 1963-08-21 A safety device for use for a three-phase electrical system

Country Status (1)

Country Link
GB (1) GB1032468A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2116790A (en) * 1981-06-25 1983-09-28 Rotork Controls Valve actuators

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2116790A (en) * 1981-06-25 1983-09-28 Rotork Controls Valve actuators

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