Drive mechanism for medium voltage switch and medium voltage switch including the drive mechanism
A driving mechanism, medium voltage technology, applied to the power device, electric switch, contact operating mechanism and other directions inside the switch, which can solve the problems of reducing the speed characteristics of the relevant switch and increasing the manufacturing cost.
Active Publication Date: 2014-06-18
ABB (SCHWEIZ) AG
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- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
As a result, overdimensioning of the spring is often required for correct operation in all situations, resulting in increased manufacturing costs
[0005] A further problem stems from the speed requirements for the opening / closing operation of the switch - this involves the precise dimensioning of the spring and its precise testing
[0006] Furthermore, the characteristics of the spring may change during the operating life, thereby reducing the speed characteristics of the associated switch below unacceptable values
Method used
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Embodiment Construction
[0029] Referring to the accompanying drawings, a driving mechanism for a medium voltage switch according to the present invention, generally indicated by reference numeral 1, generally comprises a base plate 10 and a front plate 11 defining an inner space. There may also be additional plates, such as plates 12 and 13 , between the base plate 10 and the front plate 11 . The drive mechanism also includes several components (which may be of conventional type and will not be described in detail) for connecting it to a medium voltage switch.
[0030] An operating shaft 2 and a power shaft 3 are accommodated in said inner space and mounted coaxially along a first longitudinal axis, said power shaft 3 being operatively connected to the kinematic chain of the medium voltage switch by a conventional connection system such that actuate the opening / closing operation of the switch. The operating shaft 2 has a head 20 connectable through a hole provided on the front plate 11 of the drive ...
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A drive mechanism for a Medium Voltage switch which comprises: a base plate 10 and a front plate 11 defining an internal space housing an operating shaft 2 and a power shaft 3, coaxially mounted on a first longitudinal axis, the power shaft 3 being operatively connectable to a kinematic chain of a Medium Voltage switch for opening / closing operation of said switch, the operating shaft 2 having a head 20 connectable to an operating handle for manual actuation of said shaft; a spring assembly 4 which comprises a spiral spring 41 having a first end 411 operatively coupled to said operating shaft 2 and a second end 412 operatively couplable to said power shaft 3, said spiral spring 41 being loaded by rotation of said operating shaft and actuating said power shaft when released. The operating shaft 2 is provided with release means 21 acting on said power shaft 3 by manual rotation of said operating shaft 2 and the spring assembly 4 is provided with adjusting means 40 for regulating the pre-load of said spiral spring 41.
Description
technical field [0001] The present invention relates to drive mechanisms for medium voltage switches, in particular to medium voltage line switch drive mechanisms with improved characteristics. For the purposes of this application, the term "medium voltage" refers to applied voltages ranging between 1KV and 52KV. Background technique [0002] Medium voltage switches, in particular medium voltage line switches, are well known in the prior art and generally include a drive mechanism operatively connected to and actuated by a kinematic chain of the switch to break and Close the contacts of the switch. Due to the speed requirements for performing the opening / closing operation, mechanical devices are usually used to actuate the kinematic chain of switches. In most cases, the drive mechanism is based on a spring, which is loaded prior to performing the opening / closing operation; when the spring is released, the drive mechanism transmits the energy and motion generated by the spr...
Claims
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IPC IPC(8): H01H3/30
CPCH01H3/3042
Inventor F·贝洛尼
Owner ABB (SCHWEIZ) AG