GB555036A - Improvements in or relating to the protection of polyphase alternating current or multi-wire direct current circuits or systems against failure of current in the supply lines - Google Patents

Improvements in or relating to the protection of polyphase alternating current or multi-wire direct current circuits or systems against failure of current in the supply lines

Info

Publication number
GB555036A
GB555036A GB82242A GB82242A GB555036A GB 555036 A GB555036 A GB 555036A GB 82242 A GB82242 A GB 82242A GB 82242 A GB82242 A GB 82242A GB 555036 A GB555036 A GB 555036A
Authority
GB
United Kingdom
Prior art keywords
circuit
coil
current
contacts
winding
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
GB82242A
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.)
NORTHERN ALUMINIUM Co Ltd
Original Assignee
NORTHERN ALUMINIUM Co 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 NORTHERN ALUMINIUM Co Ltd filed Critical NORTHERN ALUMINIUM Co Ltd
Priority to GB82242A priority Critical patent/GB555036A/en
Publication of GB555036A publication Critical patent/GB555036A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/12—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to underload or no-load
    • H02H3/13—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to underload or no-load for multiphase applications, e.g. phase interruption

Landscapes

  • Stopping Of Electric Motors (AREA)
  • Protection Of Generators And Motors (AREA)
  • Motor And Converter Starters (AREA)

Abstract

555,036. Protective cut-out arrangements. NORTHERN ALUMINIUM CO., Ltd., and SIMON, V. Jan. 20. 1942, No. 822. [Class 38 (v)] A protective device for opening a polyphase circuit on failure of current in a line comprises means responsive to the p.d. set-up across a selected portion of that line when currentfailure occurs, to produce operation of an isolating device. In a simple form, Fig. 1 (not shown), the circuit of the hold-on coil of a main contactor controlling a motor includes normally-closed contacts of relay coils which are shunted across the several fuses in the lines so that. if a fuse blows, the corresponding coil will be energized to open the contacts and de-energize tne contactor coil. In Fig. 2, a pair of motors 18 controlled by starters 17 are fed from a supply through main and sub-fuseboards 20, 19, respectively, and from the supply side of 20, connections are led to a sub-board 25 and thence through separate circuits to the supply side of each starter. Each circuit includes a relay coil 24 controlling normally-closed contacts 28 in the circuit of the contactor-coil 29, and contacts 30 closed by a winding 31 in parallel with coil 29. If an open circuit occurs in the shunted part of any of the supply lines, the corresponding winding 24 opens the circuit of 29 to de-energize the motor and the circuit of winding 31 to deenergize the coils 24.
GB82242A 1942-01-20 1942-01-20 Improvements in or relating to the protection of polyphase alternating current or multi-wire direct current circuits or systems against failure of current in the supply lines Expired GB555036A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB82242A GB555036A (en) 1942-01-20 1942-01-20 Improvements in or relating to the protection of polyphase alternating current or multi-wire direct current circuits or systems against failure of current in the supply lines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB82242A GB555036A (en) 1942-01-20 1942-01-20 Improvements in or relating to the protection of polyphase alternating current or multi-wire direct current circuits or systems against failure of current in the supply lines

Publications (1)

Publication Number Publication Date
GB555036A true GB555036A (en) 1943-07-30

Family

ID=9711079

Family Applications (1)

Application Number Title Priority Date Filing Date
GB82242A Expired GB555036A (en) 1942-01-20 1942-01-20 Improvements in or relating to the protection of polyphase alternating current or multi-wire direct current circuits or systems against failure of current in the supply lines

Country Status (1)

Country Link
GB (1) GB555036A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114114984A (en) * 2021-10-20 2022-03-01 北京国科诚泰农牧设备有限公司 Control system of TMR central kitchen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114114984A (en) * 2021-10-20 2022-03-01 北京国科诚泰农牧设备有限公司 Control system of TMR central kitchen
CN114114984B (en) * 2021-10-20 2024-05-10 北京国科诚泰农牧设备有限公司 Control system of TMR central kitchen

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