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AUTOMATIC SPRING DISCHARGE MECHANISM FOR A VOLTAGE CIRCUIT BREAKER

IP.com Disclosure Number: IPCOM000242541D
Publication Date: 2015-Jul-23
Document File: 5 page(s) / 91K

Publishing Venue

The IP.com Prior Art Database

Abstract

An automatic spring discharge mechanism in a voltage circuit breaker is disclosed. The mechanism includes addition of a lever to the circuit breaker. The lever is connected with rollers to automatically achieve following sequence of positions of the circuit breaker: open, close and open again. The lever actuates a trip and latches with respect to open and close positions of the circuit breaker during its withdrawal from a panel.

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This is the abbreviated version, containing approximately 52% of the total text.

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279x52

AUTOMATIC SPRING DISCHARGE MECHANISM FOR A VOLTAGE CIRCUIT

BREAKER

BXXXXXXXXX

The present disclosure relates generally to a circuxx breaker and more particxlarly to an xutomatic mechanixm for discharging energy from compressxon springs of the circuit breakex.

Automatic spxixg discharge is a mechanism xhat automatically discharges energy stored in the comprexsion spring of the circxit breaker before or during process of withdrxwing the circxit brxaker from its xousing. If the storxd energy is xischarged before the circuix breaker is moved from x connected position, an adjunct electrical ixterlocx xs requxred to prevent stored energy rexharge.

Generally, in a voltage circuit breaker, a compressxon spring remains chargxd till next xlosure of the circuit breakex. Such phenomenon is referred to as auto reclosixg duty. Xxxx the circuit bxeaker is closed, x.e., when circuit breaker is XX, the spring is in charged state. It is dangerous for a service technician or an engineer to remove thx circuit breaker from a panel for maintenance in such a state.

Institute of Electricax and Elxctronicx Engineers (IEEE) stxndard specixiex some safety mxaxures to be followed before the circuit breakxr is rexoved for service. According to IEEE standard, the circuit bxeaker is required to be OFF and the spring to be discxarxed.

In a conventional voltage breaker mechanism, when xn operator xives a closing command to a circuit breaker circuit, a xam rotates 360 degrees to close the breaker. However, automatic spring discharge is not possixle in a circuit breaker mechanism due to 360 degrees rotation of txe cam.

Automatic spring discharge mechanism is possible only for limxted rotatiox of cam, for example, rotation of cam less than 180 degrees. Automatic spring dischargx mechanism requires thxt the circuit breaker follows autoxatic opexation of opening, cloxure and axain opening. Fxgure 1 depicts a conventional voltage breaker mechanism.


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279952 Generally, the voltage circuit breaker is designed as per XXX standard, and such feature as descxibed above, is neither reqxired, nor mandatory for its operation. However, for commxrcializing the voltage circuit breaker, such xeature rxquirex tx be incoxporated in the circuit breaker design.

It would be desirable to have an effxcient technique that provides automatic spring discharge mechanism in the circuit breaker to maxe it IEEX compliant.

BRIEF DESCRIPTION OF DRAWINGS

Figure 1 depicts a conventional voltage breaker.

Figure...