GB1543882A - Overload protection of electrical apparatus - Google Patents

Overload protection of electrical apparatus

Info

Publication number
GB1543882A
GB1543882A GB17823/77A GB1782377A GB1543882A GB 1543882 A GB1543882 A GB 1543882A GB 17823/77 A GB17823/77 A GB 17823/77A GB 1782377 A GB1782377 A GB 1782377A GB 1543882 A GB1543882 A GB 1543882A
Authority
GB
United Kingdom
Prior art keywords
temperature
threshold
load
overload
dielectric fluid
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
GB17823/77A
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.)
UK OTDEL V G P IZYSKATEL
Original Assignee
UK OTDEL V G P IZYSKATEL
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 UK OTDEL V G P IZYSKATEL filed Critical UK OTDEL V G P IZYSKATEL
Publication of GB1543882A publication Critical patent/GB1543882A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H6/00—Emergency protective circuit arrangements responsive to undesired changes from normal non-electric working conditions using simulators of the apparatus being protected, e.g. using thermal images

Landscapes

  • Protection Of Transformers (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • Control Of Temperature (AREA)
  • Protection Of Static Devices (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Protection Of Generators And Motors (AREA)
  • Regulation Of General Use Transformers (AREA)

Abstract

The device contains a temperature sensor (6), which is arranged in the upper layer of a dielectric fluid, a correction device and a changeover circuit (9). The latter contains threshold-value elements (10, 11, 12, 13) for a small overload, a threshold-value element (14) for a large overload, and a load-disconnection circuit (17). The correction device contains a load-current sensor (7) and a function- forming device (8). The function-forming device (8) emits a signal which corresponds to the excess temperature of the winding of the apparatus above the temperature of the dielectric fluid and, together with the output signal of the temperature sensor (6), is applied to the threshold-value elements (10,11.12,13;14) of the changeover circuit (9). The load-disconnection circuit (17) is electrically connected to the threshold-value elements (10,11,12;13) for a small overload, for selective emission of the output-control signals. Such a device for overload protection of electrical induction apparatuses allows the change in the winding temperature which is caused by the load currents and the change in the temperature of the dielectric fluid as a result of the influence of various types of external influences to be detected in a complex manner, in order to overcome the possibility of failures of the apparatuses. <IMAGE>
GB17823/77A 1976-06-14 1977-04-28 Overload protection of electrical apparatus Expired GB1543882A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU762371184A SU691787A1 (en) 1976-06-14 1976-06-14 Apparatus for measuring wear of power transformers

Publications (1)

Publication Number Publication Date
GB1543882A true GB1543882A (en) 1979-04-11

Family

ID=20665162

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17823/77A Expired GB1543882A (en) 1976-06-14 1977-04-28 Overload protection of electrical apparatus

Country Status (7)

Country Link
JP (1) JPS52153143A (en)
CH (1) CH627029A5 (en)
DE (1) DE2723408C2 (en)
FR (1) FR2355391A1 (en)
GB (1) GB1543882A (en)
SE (1) SE412147B (en)
SU (1) SU691787A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116184104A (en) * 2023-05-05 2023-05-30 通变电器有限公司 Fault detection method, device and equipment of oil immersed transformer and storage medium

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5666145U (en) * 1979-10-26 1981-06-02
DE3738220A1 (en) * 1987-11-11 1989-05-24 Basf Lacke & Farben METHOD FOR PRODUCING CATHODICALLY DEPOSITABLE BINDER DISPERSIONS WITH CROSSLINKERS ON THE BASIS OF POLYISOCYANATES CAPACED WITH AMINO GROUPS
RU2487363C2 (en) * 2011-07-27 2013-07-10 Владимир Филиппович Ермаков Counter of transformer resource (versions)
RU2710023C2 (en) * 2018-05-22 2019-12-24 АНО "Университет" Method for protection of power transformer of ac traction substations from internal damages
RU2743902C1 (en) * 2020-06-03 2021-03-01 Федеральное государственное бюджетное образовательное учреждение высшего образования "Сибирский государственный университет науки и технологий имени академика М.Ф. Решетнева" (СибГУ им. М.Ф. Решетнева) Method for determination of dry transformer heating time constant

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2704841A (en) * 1951-01-08 1955-03-22 Mcgraw Electric Co Combined current responsive and temperature responsive alarm device for transformers
GB1161985A (en) * 1966-07-26 1969-08-20 English Electric Co Ltd Device for Determining the Temperature of Electrical Apparatus
JPS508163A (en) * 1973-05-25 1975-01-28

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116184104A (en) * 2023-05-05 2023-05-30 通变电器有限公司 Fault detection method, device and equipment of oil immersed transformer and storage medium

Also Published As

Publication number Publication date
SE7706579L (en) 1977-12-15
CH627029A5 (en) 1981-12-15
FR2355391B1 (en) 1980-02-15
DE2723408A1 (en) 1977-12-29
SE412147B (en) 1980-02-18
FR2355391A1 (en) 1978-01-13
SU691787A1 (en) 1979-10-15
JPS52153143A (en) 1977-12-20
DE2723408C2 (en) 1982-04-08

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee