GB168884A - An improved electric maximum automatic cut-out - Google Patents
An improved electric maximum automatic cut-outInfo
- Publication number
- GB168884A GB168884A GB23001/21A GB2300121A GB168884A GB 168884 A GB168884 A GB 168884A GB 23001/21 A GB23001/21 A GB 23001/21A GB 2300121 A GB2300121 A GB 2300121A GB 168884 A GB168884 A GB 168884A
- Authority
- GB
- United Kingdom
- Prior art keywords
- armature
- coil
- circuit
- mercury
- shunt
- 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
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/24—Electromagnetic mechanisms
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Magnetic Treatment Devices (AREA)
- Breakers (AREA)
Abstract
168,884. Koolhaas, D. J. B. Aug. 30, 1920, [Convention date]. Electromagnetic and magnetic switches contacts.-An electro magnetic overloac switch or cut-out com prises a magnetic circuit including two cores a, b joined by a bar c. One limb a carries a low-resistance series coil e, the other b carrying a high-re sistance shunt winding f. At the other end o the cores is mounted a block of insulating material recessed tc hold two mercury con tacts j, k, which are adapted to be con nected together by a floating armature d with limbs d<1>, d<2> dipping into the mercury when the armature is in its unattracted position. Contact blocks h, g, i carry connections by which the coil e is connected in series with the line, the main current passing through the armature d and mercury contacts j, k, and the shunt coil f being connected directly across the incoming and outgoing leads of the cut-out. With normal circuit conditions the armature d remains unattracted, but if the line current exceeds a predetermined maximum the coil c will be sufficiently energized to attract the armature d, thereby breaking its circuit. With the armature in its attracted position a closed magnetic circuit is established, and if the overload condition persist, the shunt coil will be sufficiently energized to maintain the armature d in its displaced position. Release of the armature d may only be effected either by momentarily breaking the external circuit or increasing the resistance of the external circuit sufficiently to decrease the energization of the coil f below the minimum at which it will maintain the armature d in its attracted position.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL168884X | 1920-08-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB168884A true GB168884A (en) | 1923-01-30 |
Family
ID=19776825
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB23001/21A Expired GB168884A (en) | 1920-08-30 | 1921-08-30 | An improved electric maximum automatic cut-out |
Country Status (3)
Country | Link |
---|---|
FR (1) | FR540032A (en) |
GB (1) | GB168884A (en) |
NL (1) | NL10698C (en) |
-
0
- NL NL10698D patent/NL10698C/xx active
-
1921
- 1921-08-30 FR FR540032D patent/FR540032A/en not_active Expired
- 1921-08-30 GB GB23001/21A patent/GB168884A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR540032A (en) | 1922-07-04 |
NL10698C (en) |
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