Claims:1. An electrical operating mechanism for an electrical switchgear device to operate the electrical switchgear device to at least one of ON and/or OFF position, the operating mechanism comprising:
at least one motor driving means actuated in one direction for said ON and OFF position;
at least one spring means accommodated in a racking assembly ;
a latching mechanism having one solenoid;
at least one toggle means; and
multi-gear assembly driven by said motor driving means during switching of said electrical switchgear device from ON position to OFF position;
wherein said multi-gear assembly having an arrangement comprising:
at least one worm gear unit adapted to receive input from said motor driving means and thereby rotate in one direction by means of a unidirectional bearing means;
a sun-gear unit operably coupled to said worm gear unit to receive input from said worm gear unit and thereby transfer output to an epicyclic gear train assembly coupled to said sun-gear unit;
said epicyclic gear train assembly coupled to a pinion and said racking assembly, adapted to receive said output from said sun-gear unit and thereby transfer said output to said spring means during switching of said electrical switchgear device from ON position to OFF position so that said spring means remains in a charging condition.

2. The operating mechanism as claimed in claim 1, wherein said worm gear unit comprises a combination of a spur gear means, worm wheel, said unidirectional bearing means and a worm gear.
3. The operating mechanism as claimed in claim 1, wherein rotating motion from said worm gear unit is transmitted to said sun-gear unit to achieve reduction in speed of said motor driving means.
4. The operating mechanism as claimed in claim 3, wherein said rotating motion from said sun-gear unit transferred to said epicyclic gear train assembly to drive an epicyclic gear train.
5. The operating mechanism as claimed in claim 4, wherein said rotating motion from said epicyclic gear train transferred to said pinion and said racking assembly, and said pinion and said racking assembly adapted to convert said rotating motion to a linear motion.
6. The operating mechanism as claimed in claim 2, wherein said unidirectional bearing means adapted to restrict transmission of motor load in an opposite direction for said ON and OFF position.
7. The operating mechanism as claimed in claim 1, wherein said pinion and said racking assembly is a single pinion-rack assembly comprising a rack to accommodate said spring means.
8. The operating mechanism as claimed in claim 6, wherein said spring means selectively comprising biasing spring, torsion spring, tension spring, compression spring or any combination thereof.
, Description:TECHNICAL FIELD

[001] The present subject matter described herein, in general, relates to electrical switch gears and circuit breakers. More particularly, the subject invention relates to the operating mechanism for operating contact system in the electrical switch gears and circuit breakers.
BACKGROUND

[002] Circuit breakers are used to typically serve two basic purposes, first as a switching device for switching ON/OFF during normal operating conditions for the purpose of operation and maintenance. And second as a protecting device for tripping or isolating by breaking the contacts interrupting the fault current during abnormal conditions such as short-circuit, overload and under voltage.

[003] Circuit breaker consists of one or more electric poles, whose number determined by the application as single pole circuit breaker, two-pole circuit breaker, three-pole circuit breaker and four-pole circuit breaker and so on. They are designed for use in switchboards, control panels, and combination starters in separate enclosures for effective single location distribution and control. Also these are housed inside an enclosure to provide safety to users operating the same.

[004] In the most common type of installation, an operating handle is mounted on the panel door has to be rotated to switch the circuit breaker ON and OFF. For high end operations wherein the electric supply needs to be reinstated in a very short span of time ranging in micro seconds, or while swapping ends between two supplies, a stored energy operating mechanism is mounted on the molded case circuit breaker (hereinafter referred as “MCCB”) and used to release energy required to close the contacts of the circuit breaker and reinstate the supply. The stored energy operating mechanism is one such device which is a combination of mechanisms for accumulating and storing mechanical energy, wherein the energy is used to close the primary contacts of the circuit breaker. The energy can be input to the mechanism manually or by means of a motor. The mechanism includes a series of linkages which function to utilize the energy to close the primary contacts. These linkages also function to maintain the closing force upon the primary contacts, while also functioning to allow rapid contact opening when desired.

[005] Use of electrical devices is well known for making, breaking and to provide safety in a typical electrical distribution system. These devices get mounted inside a board or panel board for added safety to the operator. Most often these devices are required to be operated either from outside or by opening the enclosure/ panel. In view of operator’s safety, remote operation is an alternative way to operate the switching devices. Usually to achieve this, an add-on accessory is mounted over the switching device, which may operate the device when called for.

[006] Also, nowadays the response time for an electrical switching system to switchover from one desired source to the other is gaining importance. Thus with a view of lesser operational time and remote operation of a switching device, stored energy type of motor mechanism are used.

[007] So far, the stored energy mechanism is used to close the circuit breaker. Thus, energy is wasted in overcoming resistance introduced by components used in charging systems. Further, if the charging system is manually operated, it can be interrupted or overrun when the charging system is engaged during manual operation of manual charging system. Yet in another scenario, some of inventions use two springs of different stiffness for charging and discharging mechanism in motor operating system for circuit breaker switching operation.

[008] Electrical operating mechanism (hereinafter referred as “EOM”), is mainly used to drive MCCB from a remote location through electrical input. EOM can be of two main types, motor operator and stored energy operator. In case of Motor operator, motor energy is used both ways of closing and opening the MCCB. In case of stored energy operator, the motor energy is used in the direction of ON-OFF movement, which means opening of MCCB, in which the spring assembled in the system is charged and allowed to store energy through various mechanical means. The stored energy is discharged, during the OFF-ON motion, which means closing of MCCB contacts.

[009] Stored energy mechanism has two modes of operation: Manual and Auto. Manual mode consists of a charging unit and the handle attached to it, so that cranking system provided onto the handle allows customer to drive the MCCB from ON-OFF and a manual OFF button allowing the unit to discharge the energized spring through various linkages mechanically connected. Auto mode consists of motor charging the spring and driving the unit from ON-OFF and input from remote location discharges the energized spring through mechanical linkages connected below.

[0010] Stored energy mechanism serves two basic purposes. First as a switching device wherein ON/OFF of contacts are performed during normal operating conditions for the purpose of operation and maintenance. Second as a protecting device wherein Tripping or Isolating by breaking the contacts interrupting the fault current during abnormal conditions such as short-circuit, overload and under voltage. Stored energy electrical operating mechanism (hereinafter referred as “SE-EOM”) is also supposed to meet the standard and Foot print requirements of basic breaker.

[0011] The MCCB being the governing element, with preset boundary conditions and constraints, SE-EOM has to perform primary, secondary and tertiary functions in a determined manner. With domain driving towards compact and cost effective modules, volume allocated for constructing SE-EOM module was limited.

[0012] The prior means of operating and achieving the intended function uses larger volume and has higher energy consumption. Prior means of stored energy operating system as shown in figure 1 consists of tension spring for storing and discharging of energy, where the chances of failure in the region of hook are higher. To achieve various functions that needed to perform MCCB operations, require increase energy transmission, increased efficiency, and increased travel accommodation (ON-OFF linear travel).

[0013] In U.S. Patent 6130392, disclosed is a stored energy circuit breaker operator for association with an operating handle of a circuit breaker contains springs that store energy when charged and that release energy when discharged. Energy is stored when a movement translation assembly is moved in a charging direction by an operator gear, and stored energy is released when a release apparatus releases the operator gear, causing the movement translation assembly to move in a discharging direction. The circuit breaker operating handle is moved to ON position by the charging movement of the movement translation assembly, and as stored energy is released, the discharging movement of the translation assembly moves the operating handle to OFF position. The operator gear is operated via an operator handle, operator shaft, and pinion gear assembly. The pinion gear assembly has a carrier pivotally associated with the operator shaft and a pinion gear that rotates the operator gear. The operator gear may also be turned by an electric motor and series of gears to accomplish electric operation of the circuit breaker.

[0014] Similarly, U.S. Patent 6166343 discloses a unidirectional clutch assembly for use with an operator handle, pinion shaft assembly, a worm gear assembly and a pinion gear assembly of a stored energy assembly for use with a circuit breaker assembly, the operator handle and pinion shaft assembly including an operator handle having an outer handle hub having a first recess for receiving a first end of the pinion shaft assembly, the worm gear assembly fitting over the pinion shaft assembly and the pinion shaft assembly having a second end for receiving a pinion gear assembly, the unidirectional clutch assembly comprising a first unidirectional clutch structure, wherein the first unidirectional clutch structure fits over the first end of the pinion shaft and the unidirectional clutch structure is fitted into the first recess of the outer handle hub; and a second unidirectional clutch structure, wherein the second unidirectional clutch structure fits within the worm gear assembly and over the pinion shaft assembly between the first and second ends of the pinion shaft assembly, wherein the first unidirectional clutch structure and said second unidirectional clutch structure are oriented in the same direction so that they slip unidirectionally in the same direction.

[0015] Also in another U.S. Patent 6192718 it is disclosed that a key lock and locking hasp assembly is used for a stored energy circuit breaker operator assembly. It is provided with an electrical control module for use with a stored energy circuit breaker assembly having a motor for use with a circuit breaker assembly, the circuit breaker assembly providing an electrical signal through electrical contacts for actuating the circuit breaker assembly, the electrical control module comprising: a rectifying circuit, which receives and rectifies said electrical signal so as to provide a rectified electrical signal; a motor switch circuit connected to the motor; and an electrical signal flow maintenance circuit, which is operatively connected to said rectifying circuit, said motor switch circuit and the motor, wherein said electrical signal flow circuit maintenance maintains at least a threshold rectified electrical when the electrical contacts are closed so that said motor switch circuit is on and the motor operates.

[0016] Another U.S. Patent 4042896 discloses a manual and motor operated circuit breaker. It is provided with a circuit function which is adapted for either manual or motor driven operation, as desired. Motor driven operation is achieved by the incorporation of a power unit comprising a motor selectively drivingly coupled to the circuit breaker operating mechanism and operating to charge the mechanism spring incident to closing the breaker contacts. Upon completion of a charging function, a closing solenoid is energized to effect release of the stored energy, which powers the breaker contacts to their closed position. Control elements sensitive to the condition of the operating mechanism and the position of the breaker movable contacts function to appropriately condition switching logic in the motor and closing solenoid circuit for sequencing the charging and closing functions in a reliable manner. The control elements further function to selectively position indicator means effective to visually identify the various breaker conditions.

[0017] However, the following are the drawbacks of the existing mechanism which is solved by the present invention:
• Separate mechanism with latch is used to keep spring in charged condition as shown in above fig, which increases the number of components and which reduces the reliability of mechanism.

• In this mechanism they are using two different latching components to discharge the spring which increases the operating force of mechanism.

• Due to two latch mechanism in existing design, two solenoid is used for delatching two latch, which add to the complexity of the mechanism.

[0018] Accordingly, in view of the existing operating mechanism there is a need for an integrated multi-gear electrical operating mechanism for molded case circuit breaker that overcomes the above mentioned drawbacks of the prior art.

SUMMARY OF THE INVENTION

[0019] The following presents a simplified summary of the invention in order to provide a basic understanding of some aspects of the invention. This summary is not an extensive overview of the present invention. It is not intended to identify the key/critical elements of the invention or to delineate the scope of the invention. Its sole purpose is to present some concept of the invention in a simplified form as a prelude to a more detailed description of the invention presented later.

[0020] An object of the present invention is to provide an electrical operating mechanism that avoid the use of different mechanism to keep spring in charged condition and thereby making the assembly simple.

[0021] Another object of the present invention is to provide compact means of electrical operating mechanism and well utilization of mechanical linkages.

[0022] Another object of the present invention is to provide electrical operating mechanism with ability to accommodate compression spring with proper seating and built-in spring guide throughout an operation.

[0023] Yet another object of the present invention is to take care of buckling effect which will be predominant if there is no support.

[0024] Still another object of the present invention is to provide an electrical operating mechanism with less number of components, fewer backlashes and less friction with higher travel.

[0025] According to one aspect, the present invention provides an electrical operating mechanism for an electrical switchgear device to operate the electrical switchgear device to at least one of ON and/or OFF position, the operating mechanism comprising:
at least one motor driving means actuated in one direction for said ON and OFF position;
at least one spring means accommodated in a racking assembly ;
a latching mechanism having one solenoid;
at least one toggle means; and
multi-gear assembly driven by said motor driving means during switching of said electrical switchgear device from ON position to OFF position;
wherein said multi-gear assembly having an arrangement comprising:
at least one worm gear unit adapted to receive input from said motor driving means and thereby rotate in one direction by means of a unidirectional bearing means;
a sun-gear unit operably coupled to said worm gear unit to receive input from said worm gear unit and thereby transfer output to an epicyclic gear train assembly coupled to said sun-gear unit;
said epicyclic gear train assembly coupled to a pinion and said racking assembly, adapted to receive said output from said sun-gear unit and thereby transfer said output to said spring means during switching of said electrical switchgear device from ON position to OFF position so that said spring means remains in a charging condition.

[0026] Other aspects, advantages, and salient features of the invention will become apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the annexed drawings, discloses exemplary embodiments of the invention.

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS

[0027] The above and other aspects, features, and advantages of certain exemplary embodiments of the present invention will be more apparent from the following description taken in conjunction with the accompanying drawings in which:

[0028] Figure 1 shows the latching mechanism to hold the spring means according to the prior art.
[0029] Figure 2 shows the Perspective view of mechanism with Base according to the one embodiment of the present invention.
[0030] Figure 3 shows the electrical operating mechanism according to the one embodiment of the present invention
[0031] Figure 4 shows the Epicyclic Gear train arrangement according to the one embodiment of the present invention.
[0032] Figure 5 shows the exploded view of the mechanism according to the one embodiment of the present invention.
[0033] Figure 6 shows Spur Gear according to the one embodiment of the present invention
[0034] Figure 7 shows Epicyclic gear train according to the one embodiment of the present invention.
[0035] Figure 8 shows Epicyclic Latch according to the one embodiment of the present invention.
[0036] Figure 9 shows Compound gear according to the one embodiment of the present invention.
[0037] Figure 10 shows worm gear according to the one embodiment of the present invention.
[0038] Figure 11 shows unidirectional bearing according to the one embodiment of the present invention.
[0039] Figure 12 shows pinion according to the one embodiment of the present invention.
[0040] Figure 13 shows rack according to the one embodiment of the present invention.
[0041] Figure 14 shows spring means according to the one embodiment of the present invention.
[0042] Figure 15 shows Internal gear according to the one embodiment of the present invention.
[0043] Figure 16 shows motor according to the one embodiment of the present invention.
[0044] Figure 17 shows motor gear according to the one embodiment of the present invention.
[0045] Figure 18 shows Main Shaft mechanism according to the one embodiment of the present invention.
[0046] Figure 19 shows Side plate Right according to the one embodiment of the present invention.
[0047] Figure 20 shows Side plate Left according to the one embodiment of the present invention.

[0048] Persons skilled in the art will appreciate that elements in the figures are illustrated for simplicity and clarity and may have not been drawn to scale. For example, the dimensions of some of the elements in the figure may be exaggerated relative to other elements to help to improve understanding of various exemplary embodiments of the present disclosure. Throughout the drawings, it should be noted that like reference numbers are used to depict the same or similar elements, features, and structures.

DETAILED DESCRIPTION OF THE PRESENT INVENTION

[0049] The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of exemplary embodiments of the invention. It includes various specific details to assist in that understanding but these are to be regarded as merely exemplary.

[0050] Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope of the invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

[0051] The terms and words used in the following description and claims are not limited to the bibliographical meanings, but, are merely used by the inventor to enable a clear and consistent understanding of the invention. Accordingly, it should be apparent to those skilled in the art that the following description of exemplary embodiments of the present invention are provided for illustration purpose only and not for the purpose of limiting the invention as defined by the appended claims and their equivalents.

[0052] It is to be understood that the singular forms “a,” “an,” and “the” include plural referents unless the context clearly dictates otherwise.

[0053] By the term “substantially” it is meant that the recited characteristic, parameter, or value need not be achieved exactly, but that deviations or variations, including for example, tolerances, measurement error, measurement accuracy limitations and other factors known to those of skill in the art, may occur in amounts that do not preclude the effect the characteristic was intended to provide.

[0054] Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments and/or in combination with or instead of the features of the other embodiments.

[0055] It should be emphasized that the term “comprises/comprising” when used in this specification is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps, components or groups thereof.

[0056] It is also to be understood that the term “module” is used in the specification to indicate an apparatus, unit, component and the like. The term “means” when used in the specification is taken to specify the mode by which desired result is achieved.

[0057] The racking mechanism of the present invention can be implemented with electrical switchgear devices that may include but not limited to, circuit breakers or thermo-magnetic breaker, molded case circuit breaker (MCCB) residual circuit breaker (RCB), earth leakage circuit breaker (ELCB) and the like.

[0058] Reference is made to figure 2 which shows the base comprising an electrical operating mechanism according to the one embodiment of the present invention.

[0059] Reference is made to figure 3 which shows the electrical operating mechanism according to the one embodiment of the present invention

[0060] Reference is made to figure 4 which shows the Epicyclic Gear train arrangement according to the one embodiment of the present invention.

[0061] Reference is made to figure 5 which shows the exploded view of the mechanism according to the one embodiment of the present invention.

[0062] Reference is made to figure 6 which shows a Spur Gear unit according to the one embodiment of the present invention.

[0063] Reference is made to figure 7 which shows an Epicyclic gear train means according to the one embodiment of the present invention.

[0064] Reference is made to figure 8 which shows an Epicyclic Latch means according to the one embodiment of the present invention.

[0065] Reference is made to figure 9 which shows a compound gear according to the one embodiment of the present invention.

[0066] Reference is made to figure 10 which shows a worm gear unit according to the one embodiment of the present invention.

[0067] Reference is made to figure 11 which shows a unidirectional bearing means according to the one embodiment of the present invention.

[0068] Reference is made to figure 12 which shows a pinion means according to the one embodiment of the present invention.

[0069] Reference is made to figure 13 wherein a rack is shown according to the one embodiment of the present invention.

[0070] Reference is made to figure 14 which shows a spring means according to the one embodiment of the present invention.

[0071] Reference is made to figure 15 which shows internal gear means according to the one embodiment of the present invention.

[0072] Reference is made to figure 16 wherein a motor driving means is shown according to the one embodiment of the present invention.

[0073] Reference is made to figure 17 which shows motor gear means according to the one embodiment of the present invention.

[0074] Reference is made to figure 18 which shows a Main Shaft mechanism according to the one embodiment of the present invention.

[0075] Reference is made to figure 19 which shows Side plate Right according to the one embodiment of the present invention.

[0076] Reference is made to Figure 20 which shows Side plate Left according to the one embodiment of the present invention.

[0077] List of the components with reference numerals to explain the figures 1-5 are follows:
• full Mechanism (100)
• Mechanism base (200)
• Epicyclic gear train (300)
• Spur (sun) Gear (1)
• Planet gear (2)
• Epicyclic Latch (3)
• Worm Gear Unit (4)
• Spur gear unit (4A)
• worm wheel (4B)
• Unidirectional bearing (4C)
• Worm gear (4D)
• spring support plate1 (5)
• spring support plate2 (12)
• spring Shaft (6)
• compression spring (7)
• side plate right (8)
• side plate left (15)
• Main shaft mechanism (9)
• motor plate (10)
• Pinion (11)
• Rack (13)
• Internal gear (14)
• Motor (16)
• Motor sleeve (17)

[0078] In one embodiment, an integrated multi-gear electrical operating mechanism (herein after ‘the operating mechanism’) for a molded case circuit breaker is provided in the present invention. The operating mechanism is adapted to operate the molded case circuit breaker to any one of ON and OFF positions. The operating mechanism comprises a motor (16), a spring (7), a latching system, a toggle system and a gear assembly. The gear assembly is an integrated multi-gear assembly and includes a worm gear unit, a spur gear unit, an epicyclic gear train and a pinion and rack assembly.

[0079] In one embodiment, the worm gear unit includes Compound gear (4) which is combination of spur gear (4A) and worm wheel (4B), unidirectional bearing (4C) and worm gear (4D).

[0080] In one embodiment, the worm gear unit will be capable of being driven by the motor during an automatic switching OFF operation of the molded case circuit breaker for undergoing rotary motion to reduce speed of the motor 16 and increase torque transmission therefrom.

[0081] In one embodiment, the spur gear (4A) will be coupled another spur gear (sun-gear unit) (1) and to the worm gear unit for further reducing the motor speed. The epicyclic gear train arrangement (300) is coupled to the sun-gear unit (1) to transfer the rotary motion therefrom. The pinion (11) and rack (13) assembly is coupled to the epicyclic gear train means (2) for converting rotary motion to larger linear motion. The pinion (11) and rack (13) assembly is that includes a rack for accommodating and charging the spring means (7) during the automatic operation of the molded case circuit breaker from ON position to OFF position. The spring is a concentric spring means (7) coiled on a built-in guide. The spring means (7) selectively comprising biasing spring, torsion spring, tension spring, compression spring or any combination thereof.

[0082] In one embodiment, the operating mechanism (100) comprises a motor (16), a spring (7), a latching system (not shown), a toggle system (not shown) and a gear assembly. Specifically, the gear assembly is an integrated multi-gear assembly. The gear assembly includes a worm gear unit (4-4A, 4B, 4C, 4D), a sun gear (1), an epicyclic gear train arrangement (300) and a pinion (11) and rack assembly (13). In an embodiment, the worm gear unit (4-4A, 4B, 4C, 4D) can be preferably made from a phosphor bronze material except 4C and the sun gear (1) and the epicyclic gear train arrangement (300) can be preferably made from thermoplastic materials.

[0083] In one embodiment, the worm gear unit (4) includes a worm wheel (4B) and a worm gear (4D). The worm gear unit (4) can be capable of driven by the motor during the automatic switching OFF operation of the MCCB .Upon being driven, the worm gear unit (20) undergoes rotary motion for reducing speed of the motor and increasing torque transmission therefrom. The worm gear unit (4) is coupled to the sun gear unit (1) for transferring the rotary motion of the motor thereto.

[0084] In one embodiment, the rotary motion of the worm gear unit (4) drives the spur gear (4A). More particularly, the worm wheel (4B) drives the spur gear (4A) that in turn drives the sun gear (1). Thus, achieves further reduction in speed of the motor. The sun gear (1) will be coupled to the epicyclic gear train arrangement (300) for transferring the rotary motion of the motor thereto.

[0085] In one embodiment, the epicyclic gear train arrangement (300) includes an internal gear (14), a sun gear (1) and planet gears (2). The internal gear (14) includes a ratchet profile/ serrations on an outer periphery thereof. The output of the sun gear unit (1) will drives the epicyclic gear train arrangement (300). More particularly, the output of the spur gear (4B) drives the sun gear (1) causing the sun gear (1) to engage with the planet gears (2) that in turn drives and transmits the motion to the internal gear (14) through the ratchet profile. The epicyclic gear train (300) gives the advantage of higher reduction, force distribution in all the gear teeth engaged at a time leading to less failure and less stress concentration on single tooth. Additionally, the epicyclic gear train (300) will take care of unidirectional motor load transmission.

[0086] In one embodiment, during ON-OFF operation, when motor loading is required, the sun gear (1) engages with the planet gears (2) and transmits the motion. During OFF-ON where spring discharging energy is utilized to switch on the MCCB, the reverse loading of the motor will be be prevented to avoid heating up of the motor. This will be taken care of with the help of epicyclic gear train (300) and Worm gear unit (4).

[0087] In one embodiment, the epicyclic gear train (300) is coupled to the pinion (11) and rack assembly (13) for transferring the rotary motion of the motor pinion-rack assembly.

[0088] In one embodiment, in order to keep the spring means in a charged condition is explain as follows: For this the unidirectional bearing (4C) within worm gear unit (4) which allows worm gear unit rotate only in one direction (clockwise). During charging pinion(11) rotate in anticlockwise direction which rotates internal gear(14) in same direction as it coupled with same shaft (9) which try to rotate sun gear(1) in clockwise direction which in turns try to rotate Worm gear unit (4) in anticlockwise but due to unidirectional bearing(4C) it will not rotate in anticlockwise direction. And epicyclic latch (3) and Planet gear (2) adapted to keep the spring means in charged condition unless and until it is discharged during OFF to ON condition.

[0089] Some of the noteworthy features of the present invention are as follows:
• The present invention provide an improved mechanism to keep spring in charged condition using unidirectional bearing within gear.
• In the present invention, there is a single latch system to discharge the spring.
• Only one latch mechanism has been used, so it needs only one solenoid as compared to old mechanism which uses 2 solenoid for 2 latch mechanism.

[0090] Some of the advantages of the present invention are as follows:
• The invention provides a way to avoid the use of different mechanism to keep spring in charged condition. Hence reduces the component.
• It also makes the assembly simpler.
• Low cost and better reliability.
• It reduces the conventional 2 latch mechanism into 1 Latch and make mechanism which makes the overall operating mechanism simple for keeping the mechanism in charged condition.
• The unidirectional bearing has been used at starting stage of gear box, so bearing size and torque resistant is less.
• Only one latch mechanism has been used, so it needs only one solenoid as compared to old mechanism which uses 2 solenoid for 2 latch mechanism.

[0091] Although an electrical operating mechanism for electrical switchgear devices have been described in language specific to structural features and/or methods, it is to be understood that the embodiments disclosed in the above section are not necessarily limited to the specific features or methods or devices described. Rather, the specific features are disclosed as examples of implementations of the electrical operating mechanism for electrical switchgear devices.