GB649960A - Improvements in or relating to protecting devices for reciprocating compressors - Google Patents

Improvements in or relating to protecting devices for reciprocating compressors

Info

Publication number
GB649960A
GB649960A GB1417048A GB1417048A GB649960A GB 649960 A GB649960 A GB 649960A GB 1417048 A GB1417048 A GB 1417048A GB 1417048 A GB1417048 A GB 1417048A GB 649960 A GB649960 A GB 649960A
Authority
GB
United Kingdom
Prior art keywords
switch
heater coil
compressor
oil pressure
predetermined
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
GB1417048A
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.)
Carrier Corp
Original Assignee
Carrier 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 Carrier Corp filed Critical Carrier Corp
Priority to GB1417048A priority Critical patent/GB649960A/en
Publication of GB649960A publication Critical patent/GB649960A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H35/00—Switches operated by change of a physical condition
    • H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
    • H01H35/32—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow actuated by bellows
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
    • H02H5/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal fluid pressure, liquid level or liquid displacement, e.g. Buchholz relays
    • H02H5/086—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal fluid pressure, liquid level or liquid displacement, e.g. Buchholz relays of cooling or lubricating fluids

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Compressor (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

649,960. Engine stop-gear. HEIDE, H.C. (Carrier Corporation). May 25, 1948, No. 14170. [Class 122(iv)] In a safety device for a refrigeration compressor 2 failure of lubricating oil pressure actuates a differential pressure mechanism 12 responsive to the difference between the lubricating oil pressure and crankcase pressure to permit electric current to pass through a heater coil 14 of a time delay relay 13 comprising the heater coil 14 and a switch 15, passage of current through the heater coil beyond a predetermined time interval causing actuation of the switch 15 to discontinue operation of the compressor. In operation a starter mechanism 11, to which the safety device is electrically connected, actuates the compressor motor 10, and energizes a transformer 16 and a current flows through the time delay switch 15, heater coil 14 and a differential pressure mechanism operated switch 12. If a predetermined oil pressure is created within a predetermined time interval the differential pressure switch 12 opens thereby preventing further current flow through the heater coil 14, the time delay switch 15 remains closed and operation continues through the circuit closed by switch 15. If the predetermined oil pressure is not created within the time interval or, if during normal running of the compressor the oil pressure falls and remains below the predetermined figure for more than the predetermined time interval, the current flowing through the heater coil 14 causes it to open the switch 15 and thereby open the motor circuit and discontinue operation of the compressor.
GB1417048A 1948-05-25 1948-05-25 Improvements in or relating to protecting devices for reciprocating compressors Expired GB649960A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1417048A GB649960A (en) 1948-05-25 1948-05-25 Improvements in or relating to protecting devices for reciprocating compressors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1417048A GB649960A (en) 1948-05-25 1948-05-25 Improvements in or relating to protecting devices for reciprocating compressors

Publications (1)

Publication Number Publication Date
GB649960A true GB649960A (en) 1951-02-07

Family

ID=10036270

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1417048A Expired GB649960A (en) 1948-05-25 1948-05-25 Improvements in or relating to protecting devices for reciprocating compressors

Country Status (1)

Country Link
GB (1) GB649960A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10941775B2 (en) 2017-12-28 2021-03-09 Ingersoll-Rand Industrial U.S., Inc. Compressor stop valve and associated system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10941775B2 (en) 2017-12-28 2021-03-09 Ingersoll-Rand Industrial U.S., Inc. Compressor stop valve and associated system
US11920593B2 (en) 2017-12-28 2024-03-05 Ingersoll-Rand Industrial U.S., Inc. Compressor stop valve and associated system

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