GB1483635A - Electrical current limiting device - Google Patents
Electrical current limiting deviceInfo
- Publication number
- GB1483635A GB1483635A GB4867474A GB4867474A GB1483635A GB 1483635 A GB1483635 A GB 1483635A GB 4867474 A GB4867474 A GB 4867474A GB 4867474 A GB4867474 A GB 4867474A GB 1483635 A GB1483635 A GB 1483635A
- Authority
- GB
- United Kingdom
- Prior art keywords
- contacts
- contact
- arc
- current limiting
- gas
- 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
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/38—Auxiliary contacts on to which the arc is transferred from the main contacts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
- H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
- H01H77/10—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening
- H01H77/107—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening characterised by the blow-off force generating means, e.g. current loops
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
- H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
- H01H2077/025—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with pneumatic means, e.g. by arc pressure
Abstract
1483635 Current limiting devices BBC BROWN BOVERI & CO Ltd 11 Nov 1974 [12 Nov 1973] 48674/74 Heading H1N [Also in in Division H2] A restorable current limiting device comprises, in a chamber 5, a fixed contact 1 and a moving contact 3, an electrodynamic actuating spring coil 4 which separates the contacts when a predetermined magnitude of current flows through them, and a piston 3a integral with the movable contact and arranged to move in response to an increase in gas pressure in the contact region of the chamber 5, due to an arc struck between the contacts, to assist in separating the contacts. The resistance of the arc between the contacts limits the current flowing through the contacts. The gas may be evolved from gas evolving material which is used for constructing or coating the housing or a sheath 5a insulating the fixed contact. Movement of the piston opens gas venting ports 8 in the wall of the chamber. The movable contact 3 is connected to an insulating tappet 9 which actuates or trips a circuit breaker connected in series with the current limiting device. An axial magnetic field generated in the spring coil 4 has a destabilizing effect on the arc and reduces contact burning. In a second embodiment, Fig. 2, not shown, both contacts are movable and arranged in the same way as the movable contact in the first embodiment with associated spring coils and pistons in a symmetrical construction. Annular electrodes are associated with the moving contacts and serve as tracks for the arc, these electrodes having limited movement compared with the contacts and being used to uncover the venting ports when they are moved by gas pressure.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH1587773A CH566640A5 (en) | 1973-11-12 | 1973-11-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1483635A true GB1483635A (en) | 1977-08-24 |
Family
ID=4412711
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4867474A Expired GB1483635A (en) | 1973-11-12 | 1974-11-11 | Electrical current limiting device |
Country Status (5)
Country | Link |
---|---|
JP (1) | JPS5079741A (en) |
CH (1) | CH566640A5 (en) |
DE (2) | DE2360773A1 (en) |
FR (1) | FR2251094B3 (en) |
GB (1) | GB1483635A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112840430A (en) * | 2018-08-02 | 2021-05-25 | 威洛科技有限公司 | Contactor |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4407630A (en) * | 1979-01-22 | 1983-10-04 | Setsuo Toda | Work feed method in a press |
JPS55106546U (en) * | 1979-01-22 | 1980-07-25 | ||
DE2937490A1 (en) * | 1979-09-17 | 1981-04-02 | Siemens AG, 1000 Berlin und 8000 München | CURRENT LIMITERS |
EP2814049A1 (en) * | 2013-06-11 | 2014-12-17 | ABB Technology AG | Drive mechanism for a switching device |
-
1973
- 1973-11-12 CH CH1587773A patent/CH566640A5/xx not_active IP Right Cessation
- 1973-12-06 DE DE19732360773 patent/DE2360773A1/en not_active Withdrawn
- 1973-12-06 DE DE19737343364 patent/DE7343364U/en not_active Expired
-
1974
- 1974-11-11 GB GB4867474A patent/GB1483635A/en not_active Expired
- 1974-11-12 JP JP12963974A patent/JPS5079741A/ja active Pending
- 1974-11-12 FR FR7437234A patent/FR2251094B3/fr not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112840430A (en) * | 2018-08-02 | 2021-05-25 | 威洛科技有限公司 | Contactor |
Also Published As
Publication number | Publication date |
---|---|
JPS5079741A (en) | 1975-06-28 |
DE7343364U (en) | 1975-10-16 |
CH566640A5 (en) | 1975-09-15 |
FR2251094B3 (en) | 1977-08-12 |
DE2360773A1 (en) | 1975-05-15 |
FR2251094A1 (en) | 1975-06-06 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
435 | Patent endorsed 'licences of right' on the date specified (sect. 35/1949) | ||
PCNP | Patent ceased through non-payment of renewal fee |