GB553638A - Improvements in or relating to electric switches and switchgear having auxiliary sparking contacts - Google Patents

Improvements in or relating to electric switches and switchgear having auxiliary sparking contacts

Info

Publication number
GB553638A
GB553638A GB1527341A GB1527341A GB553638A GB 553638 A GB553638 A GB 553638A GB 1527341 A GB1527341 A GB 1527341A GB 1527341 A GB1527341 A GB 1527341A GB 553638 A GB553638 A GB 553638A
Authority
GB
United Kingdom
Prior art keywords
contact
closing
break
air
blade
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
GB1527341A
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.)
BROOKHIRST SWITCHGEAR Ltd
Original Assignee
BROOKHIRST SWITCHGEAR 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 BROOKHIRST SWITCHGEAR Ltd filed Critical BROOKHIRST SWITCHGEAR Ltd
Priority to GB1527341A priority Critical patent/GB553638A/en
Publication of GB553638A publication Critical patent/GB553638A/en
Expired legal-status Critical Current

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

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Abstract

553,638. Arc-rupturing in switches. BROOKHIRST SWITCHGEAR, Ltd., and HARRIS, R. C. Nov. 27, 1941, No. 15273. [Class 38 (v)] The movable arcing contact 20 of an air or oil-break switch is mounted on a bellcrank lever 16 which is pivoted at 23 to the main movable blade contact 14 and carries a weight 22 or is formed as a damping air vane or paddle. Owing to inertia effects in opening and closing, the lever 16 is caused to lag behind the blade 14, so causing the tip 20 to travel in a loop 24 whereby it acts as a spark-taking, contact in opening circuit, but in closing circuit engages the fixed arcing contact 15 after the main contacts engage, and at a different point on the contact 15 from that whereat it separated. The pivot position is also such that the contactpressure between 20, 15 is reinforced electrodynamically by the current loop comprising arm 19 and the blade extension. The switch may be snap-operated and can function even if tilted backwards or forwards by 45 degrees. In Fig. 1, centrifugal force tends to assist inertia-effects in closing, but in Fig. 4 the arrangement is such that centrifugal force acts in both directions as shown by the arrows 25 and radial line 26. The Specification refers also to the weight being shaped as a wind vane and paddle in air-break and oil-break switches, respectively.
GB1527341A 1941-11-27 1941-11-27 Improvements in or relating to electric switches and switchgear having auxiliary sparking contacts Expired GB553638A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1527341A GB553638A (en) 1941-11-27 1941-11-27 Improvements in or relating to electric switches and switchgear having auxiliary sparking contacts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1527341A GB553638A (en) 1941-11-27 1941-11-27 Improvements in or relating to electric switches and switchgear having auxiliary sparking contacts

Publications (1)

Publication Number Publication Date
GB553638A true GB553638A (en) 1943-05-31

Family

ID=10056123

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1527341A Expired GB553638A (en) 1941-11-27 1941-11-27 Improvements in or relating to electric switches and switchgear having auxiliary sparking contacts

Country Status (1)

Country Link
GB (1) GB553638A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1439558A1 (en) * 2002-02-16 2004-07-21 Jean Müller GmbH Elektrotechnische Fabrik Contact arrangement for switching device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1439558A1 (en) * 2002-02-16 2004-07-21 Jean Müller GmbH Elektrotechnische Fabrik Contact arrangement for switching device

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