Abstract: The present disclosure relates to a safety interlock mechanism (100) that includes a draw-out interlock element (104) positioned on an upper base of an electrically operating mechanism (EOM) (114). The draw-out interlock element configured to selectively obstruct a slot 108 of a draw-out mechanism. A handle (102) is inserted into the slot of the draw-out mechanism to rack-in and rack-out a circuit breaker, thereby connecting or disconnecting the circuit breaker from a main supply, wherein the draw-out interlock element (104) obstructs the slot (108) through which the handle (102) is inserted to restrict the operation of the draw-out mechanism when the circuit breaker is in ON condition, thereby mitigating possibility of an electrical hazard.
Description:TECHNICAL FIELD
[0001] The present disclosure relates, in general, to the field of auto operation of circuit breakers, and more specifically, relates to a draw-out interlock safety feature for an actuating mechanism for the circuit breaker.
BACKGROUND
[0002] An electrical operating mechanism (EOM) is used to drive a molded case circuit breaker (MCCB) from a remote location through electrical input. EOM can be of two main types, direct drive operator and stored energy operator. In the case of a direct drive operator, motor energy is used in both ways of closing and opening the MCCB. In the case of the stored energy operator, the motor energy is used in the direction of ON-OFF movement, which means the 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. Stored energy operator has two modes of operation, manual and auto. Manual mode consists of a charging unit and the handle attached to it, so the cranking system provided onto the handle allows the customer to drive the MCCB from ON-OFF and a manual ON button allows the unit to discharge the energized spring through various linkages mechanically connected. The auto mode consists of a motor charging the spring and driving the unit from ON-OFF and input from a remote location discharges the energized spring through mechanical linkages connected below.
[0003] The draw-out mechanism is an external accessory of circuit breakers which helps to connect or disconnect the breaker or MCCB to the main bus without unbolting or disturbing the termination. The draw-out mechanism has three distinct positions such as connect, disconnect, and test position. In the connect position, MCCB is connected to the main supply. In the test position, MCCB is disconnected from the main supply but still engaged with the driving mechanism which helps in testing the internal accessories of MCCB. In the disconnect position, MCCB is disconnected from the supply. MCCB is racked in and racked out by inserting a handle into the draw-out mechanism.
[0004] However, the existing draw-out mechanism lacks a safety interlock feature between the draw-out mechanism and the stored energy electrically operated mechanism (SE-EOM). There is, therefore, a need for a mechanism inside the SE-EOM to hinder personnel from accessing the draw-out mechanism when the circuit breaker is in the ON condition. This measure aims to prevent the potential for electrical hazards and establish a safety interlock for enhanced safety protocols.
OBJECTS OF THE PRESENT DISCLOSURE
[0005] An object of the present disclosure relates, in general, to the field of auto operation of circuit breakers, and more specifically, relates to a draw-out interlock safety feature for an actuating mechanism for the circuit breaker.
[0006] Another object of the present disclosure is to provide a safety interlock mechanism that effectively prevents inadvertent or unauthorized rack-in and rack-out operations when the MCCB is in the ON/TRIP state
[0007] Another object of the present disclosure is to provide a safety interlock mechanism that facilitates maintenance activities, allowing for efficient handling of the draw-out mechanism when the circuit breaker is not in active use.
[0008] Another object of the present disclosure is to provide a safety interlock mechanism that ensures that the essential components remain securely in place during operation, preventing any unintended disassembly that could compromise the integrity of the circuit breaker when the MCCB is in the ON state.
[0009] Another object of the present disclosure is to provide a safety interlock mechanism that prevents potential operational errors or electrical issues that may arise during these critical transition phases, enhancing overall system safety.
[0010] Yet another object of the present disclosure is to provide a safety interlock mechanism that provides clear and reliable information about the current state of the mechanism, allowing operators to easily identify whether the circuit breaker is in the connect, test, or disconnect position. This enhances operational awareness and contributes to efficient monitoring of the system.
SUMMARY
[0011] The present disclosure relates in general, to the field of auto operation of circuit breakers, and more specifically, relates to a draw-out interlock safety feature for an actuating mechanism for the circuit breaker. The main objective of the present disclosure is to overcome the drawbacks, limitations, and shortcomings of the existing mechanism and solution, by providing a safety interlock mechanism that prevents the personnel from accessing the draw-out mechanism when the circuit breaker is in ON condition thus preventing a possibility of an electrical hazard.
[0012] The safety interlock mechanism includes a draw-out interlock element positioned on an upper base of an electrically operating mechanism (EOM). The draw-out interlock element is configured to selectively obstruct a slot of a draw-out mechanism. A handle is inserted into the slot of the draw-out mechanism to rack-in and rack-out a circuit breaker, thereby connecting or disconnecting the circuit breaker from a main supply. The draw-out interlock element obstructs the slot through which the handle is inserted to restrict the operation of the draw-out mechanism when the circuit breaker is in ON condition, thereby mitigating the possibility of an electrical hazard.
[0013] In an aspect, at the ON or TRIP state of the circuit breaker, a rack is projected and the projection on the rack strikes the draw-out interlock element, initiating a counter-clockwise rotation that obstructs the slot through which the handle is to be inserted. The obstruction of the slot by the draw-out interlock element prevents users from accessing the draw-out mechanism, consequently impeding the rack-in and the rack-out operation when the circuit breaker is in the ON condition. When the MCCB is in the ON/TRIP state, the draw-out mechanism is inaccessible through the handle, effectively preventing inadvertent or unauthorized rack-in and rack-out operations. This enhances safety by avoiding potential hazards associated with accessing the mechanism during active states.
[0014] In another aspect, at OFF state of the circuit breaker, the draw-out interlock element is restored to original position by a restoration spring, thereby unobstructing the slot and enabling the users to perform the rack-in and rack-out operations by inserting the handle. In the OFF state of the MCCB, the draw-out mechanism becomes accessible through the handle, enabling convenient rack-in and rack-out operations. This feature facilitates maintenance activities, allowing for efficient handling of the draw-out mechanism when the circuit breaker is not in active use.
[0015] The draw-out interlock element is obstructed when the circuit breaker is in transitional stages between connect and test position and test and disconnect position, preventing the users from turning the circuit breaker ON during intermediate phases. In transitional stages between the 'connect and test' position and the 'test and disconnect' position, the circuit breaker cannot be switched ON. This precautionary measure prevents potential operational errors or electrical issues that may arise during these critical transition phases, enhancing overall system safety.
[0016] In another aspect, at the ON state of the circuit breaker, the draw-out interlock element ensures that the EOM cannot be unmounted from the circuit breaker, maintaining safety and compliance. When the MCCB is in the ON state, the EOM cannot be unmounted from the breaker. This ensures that the essential components remain securely in place during operation, preventing any unintended disassembly that could compromise the integrity of the circuit breaker.
[0017] In another aspect, when the circuit breaker is racked-in and racked-out from the draw-out mechanism, the indication component of the EOM hits a rotary component in the draw-out mechanism thus providing indications of three distinct positions of the draw-out mechanism. The three distinct positions of the draw-out mechanism pertain to connect, disconnect, and test positions. The indications of the three distinct positions of the draw-out mechanism are obtained from the EOM indication component. This provides clear and reliable information about the current state of the mechanism, allowing operators to easily identify whether the circuit breaker is in the connect, test, or disconnect position. This enhances operational awareness and contributes to efficient monitoring of the system.
[0018] Various objects, features, aspects, and advantages of the inventive subject matter will become more apparent from the following detailed description of preferred embodiments, along with the accompanying drawing figures in which like numerals represent like components.
BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The following drawings form part of the present specification and are included to further illustrate aspects of the present disclosure. The disclosure may be better understood by reference to the drawings in combination with the detailed description of the specific embodiments presented herein.
[0020] FIG. 1A illustrates the assembly of the draw-out interlock element, in accordance with an embodiment of the present disclosure.
[0021] FIG. 1B illustrates the assembly of discharged condition of EOM, in accordance with an embodiment of the present disclosure.
[0022] FIG. 1C illustrates the assembly of charged condition of EOM, in accordance with an embodiment of the present disclosure.
DETAILED DESCRIPTION
[0023] The following is a detailed description of embodiments of the disclosure depicted in the accompanying drawings. The embodiments are in such detail as to clearly communicate the disclosure. If the specification states a component or feature “may”, “can”, “could”, or “might” be included or have a characteristic, that particular component or feature is not required to be included or have the characteristic.
[0024] As used in the description herein and throughout the claims that follow, the meaning of “a,” “an,” and “the” includes plural reference unless the context clearly dictates otherwise. Also, as used in the description herein, the meaning of “in” includes “in” and “on” unless the context clearly dictates otherwise.
[0025] The present disclosure relates, in general, to the field of auto operation of circuit breaker, and more specifically, relates to a draw-out interlock safety feature for an actuating mechanism for the circuit breaker. The safety interlock mechanism includes a draw-out interlock element positioned on the upper base of an electrically operating mechanism (EOM). The draw-out interlock element is configured to selectively obstruct a slot of a draw-out mechanism. A handle is inserted into the slot of the draw-out mechanism to rack-in and rack-out a circuit breaker, thereby connecting or disconnecting the circuit breaker from a main supply, wherein the draw-out interlock element obstructs the slot through which the handle is inserted to restrict the operation of the draw-out mechanism when the circuit breaker is in ON condition, thereby mitigating the possibility of an electrical hazard.
[0026] In an aspect, at the ON or TRIP state of the circuit breaker, a rack is projected and the projection on the rack strikes the draw-out interlock element, initiating a counter-clockwise rotation that obstructs the slot through which the handle is to be inserted. The obstruction of the slot by the draw-out interlock element prevents users from accessing the draw-out mechanism, consequently impeding the rack-in and the rack-out operation when the circuit breaker is in the ON condition.
[0027] In another aspect, at the OFF state of the circuit breaker, the draw-out interlock element is restored to its original position by a restoration spring, thereby unobstructing the slot and enabling the users to perform the rack-in and rack-out operations by inserting the handle. The draw-out interlock element is obstructed when the circuit breaker is in transitional stages between the connect and test position and the test and disconnect position, preventing the users from turning the circuit breaker ON during intermediate phases.
[0028] In another aspect, at the ON state of the circuit breaker, the draw-out interlock element ensures that the EOM cannot be unmounted from the circuit breaker, maintaining safety and compliance. when the circuit breaker is racked-in and racked-out from the draw-out mechanism, the indication component EOM hits a rotary component in the draw-out mechanism thus providing indications of three distinct positions of the draw-out mechanism. The three distinct positions of the draw-out mechanism pertain to connect, disconnect, and test positions. The present disclosure can be described in enabling detail in the following examples, which may represent more than one embodiment of the present disclosure.
[0029] The advantages achieved by the safety interlock mechanism of the present disclosure can be clear from the embodiments provided herein. The safety interlock mechanism is configured to address various aspects of circuit breaker operation. Specifically, it effectively prevents inadvertent or unauthorized rack-in and rack-out operations when the MCCB is in the ON/TRIP state, ensuring heightened safety during active use. Moreover, the mechanism facilitates maintenance activities by allowing efficient handling of the draw-out mechanism when the circuit breaker is not in active operation. It further ensures the secure placement of essential components during operation, preventing unintended disassembly that could compromise the integrity of the circuit breaker in the ON state. The safety interlock mechanism also mitigates potential operational errors or electrical issues during critical transition phases, enhancing overall system safety. Additionally, the present disclosure provides operators with clear and reliable information about the current state of the mechanism, allowing easy identification of whether the circuit breaker is in the connect, test, or disconnect position. This feature enhances operational awareness and contributes to the efficient monitoring of the system. The description of terms and features related to the present disclosure shall be clear from the embodiments that are illustrated and described; however, the invention is not limited to these embodiments only. Numerous modifications, changes, variations, substitutions, and equivalents of the embodiments are possible within the scope of the present disclosure. Additionally, the invention can include other embodiments that are within the scope of the claims but are not described in detail with respect to the following description.
[0030] FIG. 1A illustrates the assembly of the draw-out interlock element, in accordance with an embodiment of the present disclosure.
[0031] Referring to FIG. 1A, a safety interlock mechanism 100 between SE-EOM and the draw-out mechanism is disclosed. FIG. 1A illustrates the assembly of the draw-out interlock element 104. The safety interlock mechanism 100 can include a draw-out interlock element 104 positioned on an upper base of the EOM 114. The draw-out interlock element 104 is secured on the upper base of the EOM 114 using fasteners, such as a set of screws. The draw-out interlock element 104 is configured to selectively obstruct slot 108 of a draw-out mechanism. The circuit breaker along with the EOM can be racked in and racked out by inserting a handle 102 in the provided slot 108.
[0032] The draw-out mechanism is an external accessory of circuit breakers which helps to connect or disconnect the circuit breaker or MCCB to the main bus without unbolting or disturbing the termination. The draw-out mechanism has three distinct positions such as connect, disconnect, and test position. In connect position, MCCB (also referred to as circuit breaker, herein) is connected to the main supply. In the test position, the MCCB is disconnected from the main supply but still engaged with the driving mechanism which helps in testing the internal accessories of the MCCB. In the disconnect position, MCCB is disconnected from the supply.
[0033] The draw-out interlock element 104 serves to obstruct slot 108 through which the handle 102 would normally enter the draw-out mechanism. The handle 102 is inserted into slot 108 of the draw-out mechanism to rack-in and rack-out the circuit breaker, thereby connecting or disconnecting the circuit breaker from the main supply. The draw-out interlock element 104 obstructs the slot 108 through which the handle 102 is inserted to restrict the operation of the draw-out mechanism when the circuit breaker is in ON condition, thereby mitigating the possibility of an electrical hazard.
[0034] In an embodiment, the obstruction occurs when rack 110 reaches the discharged position, as depicted in FIG. 1B. At the ON or TRIP state of the circuit breaker, the rack 110 is projected 112 and the projection on the rack 110 strikes the draw-out interlock element 104 initiating a counter-clockwise rotation that obstructs slot 108 through which the handle 102 is to be inserted. The obstruction of slot 108 by the draw-out interlock element 104 prevents users from accessing the draw-out mechanism, consequently impeding the rack-in and the rack-out operation when the circuit breaker is in the ON condition.
[0035] When the MCCB is in the ON/TRIP state, the draw-out mechanism is inaccessible through the handle 102, effectively preventing inadvertent or unauthorized rack-in and rack-out operations. This enhances safety by avoiding potential hazards associated with accessing the mechanism during active states.
[0036] For example, in need of maintenance on the circuit breaker, an operator wants to rack out the circuit breaker for inspection. As per the safety interlock mechanism 100 described in the present disclosure, when the circuit breaker is in the ON condition i.e., it is actively connected to the main power supply, the draw-out interlock element 104 obstructs the slot 108 through which the handle 102 would normally enter the draw-out mechanism. So, in this example, if an operator attempts to insert the handle 102 to rack-out the circuit breaker while it is in the ON condition, the draw-out interlock element 104 prevents the handle 102 from entering slot 108, thus mitigating the possibility of the electrical hazard. This safety feature ensures that personnel cannot access the draw-out mechanism and attempt to remove the circuit breaker while it is still energized, reducing the risk of electrical accidents during maintenance or other operations.
[0037] In another embodiment, at OFF state of the circuit breaker as depicted in FIG. 1C, the draw-out interlock element 104 is restored to original position by a restoration spring 106, thereby unobstructing the slot 108 and enabling the users to perform the rack-in and rack-out operations by inserting the handle 102. The restoration spring 106 is positioned at one portion of the draw-out interlock element 104. At the ON state of the circuit breaker, the restoration spring 106 is expanded and in the OFF state of the circuit breaker, the restoration spring 106 is compressed. In the OFF state of the MCCB, the draw-out mechanism becomes accessible through the handle 102, enabling convenient rack-in and rack-out operations. This feature facilitates maintenance activities, allowing for efficient handling of the draw-out mechanism when the circuit breaker is not in active use.
[0038] For example, when maintenance or any other situation requires the circuit breaker to be turned OFF, the restoration spring 106 compresses, allowing the draw-out interlock element 104 to return to its original position. With the draw-out interlock element disengaged, the slot 108 becomes unobstructed, and handle 102 can be inserted. This enables users to easily perform rack-in and rack-out operations on the draw-out mechanism in the OFF state of the MCCB. Such a mechanism enhances safety by preventing accidental or unauthorized access to the draw-out mechanism when the circuit breaker is in an active state while allowing convenient and efficient maintenance activities when the circuit breaker is not actively in use.
[0039] In another embodiment, the draw-out interlock element 104 is obstructed when the circuit breaker is in transitional stages between ‘connect and test’ position and ‘test and disconnect’ position, preventing the users from turning the circuit breaker ON during intermediate phases. In transitional stages between the 'connect and test' position and the 'test and disconnect' position, the circuit breaker cannot be switched ON. This precautionary measure prevents potential operational errors or electrical issues that may arise during these critical transition phases, enhancing overall system safety.
[0040] For example, when the circuit breaker is in the 'connect and test' position and test and disconnect’ position. The maintenance personnel need to perform tests on various components, and during this stage, the draw-out interlock element 104 is engaged, obstructing any attempt to turn the circuit breaker ON. Due to the engagement of the draw-out interlock element, this action is blocked, preventing any potential safety hazards or operational issues.
[0041] In another embodiment, at the ON state of the circuit breaker, the draw-out interlock element 104 ensures that the EOM cannot be unmounted from the circuit breaker, maintaining safety and compliance. When the MCCB is in the ON state, the EOM cannot be unmounted from the breaker. This ensures that the essential components remain securely in place during operation, preventing any unintended disassembly that could compromise the integrity of the circuit breaker.
[0042] For example, while the MCCB is in the ON state, the user, following safety protocols, attempts to unmount the EOM for inspection or replacement. However, due to the engagement of the draw-out interlock element 104, the EOM remains securely in place. This prevents any unintentional attempts to disassemble or remove the EOM while the circuit breaker is actively supplying power.
[0043] In another embodiment, when the circuit breaker is racked-in and racked-out from the draw-out mechanism, the indication component of the EOM 114 hits a rotary component in the draw-out mechanism thus providing indications of three distinct positions of the draw-out mechanism. The three distinct positions of the draw-out mechanism pertain to connect, disconnect, and test position. The indications of the three distinct positions of the draw-out mechanism are obtained from the EOM indication component. This provides clear and reliable information about the current state of the mechanism, allowing operators to easily identify whether the circuit breaker is in the connect, test, or disconnect position. This enhances operational awareness and contributes to efficient monitoring of the system.
[0044] For example, the user, observing the circuit breaker, notices that the EOM indication component is aligned in a certain way, indicating that the circuit breaker is currently in the disconnect position, then shifts to the connect position and then to the test position. This visual cue allows for a quick and accurate assessment of the status of the draw-out mechanism.
[0045] The mechanism facilitates clear and reliable indications of the three distinct positions (connect, test, and disconnect) of the draw-out mechanism. The visual cues provided by the interaction between the EOM indication component and the rotary component enhance operational awareness, enabling operators to easily identify and monitor the current state of the circuit breaker.
[0046] The EOM 114 can include a motor and an epicyclic gear assembly operatively configured with a motor shaft, such that the rotation of the motor shaft facilitates the rotation of the epicyclic gear assembly, further facilitating the rotation of a drive shaft. The drive shaft is operatively configured with rack 110, where the rack 110 is configured to move linearly, resulting in switching ON/OFF of the circuit breaker. The operation of the draw-out mechanism, when MCCB is in ON condition, is prevented by the draw-out safety interlock mechanism 100.
[0047] FIG. 1B illustrates the assembly of discharged condition of EOM, in accordance with an embodiment of the present disclosure. FIG. 1B depicts the discharged condition of the EOM, i.e., ON/TRIP state of the MCCB. In this state, the projection 112 on rack 110 comes into contact with the draw-out interlock element 104, triggering a counter-clockwise rotation. This rotational movement serves to obstruct the handle insertion slot 108, preventing personnel from accessing the draw-out mechanism. As a result, the rack-in and rack-out operations are impeded when the MCCB is in the ON condition.
[0048] FIG. 1C illustrates the assembly of charged condition of EOM, in accordance with an embodiment of the present disclosure. FIG. 1C illustrates the charged condition of the EOM, i.e., OFF state of the MCCB. In this state, the draw-out interlock element 104 is restored to its original position with the assistance of the restoration spring 106. This restoration action unblocks the handle insertion slot 108, allowing users to engage in rack-in and rack-out operations by inserting the handle.
[0049] The draw-out interlock element 104 gets obstructed by the draw-out mechanism part when the breaker is in the transitional stages between the ‘connect and test’ position and the ‘test and disconnect’ position, preventing users from turning the breaker ON during these intermediate phases. When the MCCB is in the ON state, the draw-out interlock element 104 ensures that EOM 114 cannot be unmounted from the circuit breaker, maintaining safety and compliance with this condition.
[0050] Thus, the present invention overcomes the drawbacks, shortcomings, and limitations associated with existing solutions, and provides the safety interlock mechanism configured to address various aspects of circuit breaker operation. Specifically, it effectively prevents inadvertent or unauthorized rack-in and rack-out operations when the MCCB is in the ON/TRIP state, ensuring heightened safety during active use. Moreover, the mechanism facilitates maintenance activities by allowing efficient handling of the draw-out mechanism when the circuit breaker is not in active operation. It further ensures the secure placement of essential components during operation, preventing unintended disassembly that could compromise the integrity of the circuit breaker in the ON state. The safety interlock mechanism also mitigates potential operational errors or electrical issues during critical transition phases, enhancing overall system safety. Additionally, the invention provides operators with clear and reliable information about the current state of the mechanism, allowing easy identification of whether the circuit breaker is in the connect, test, or disconnect position. This feature enhances operational awareness and contributes to the efficient monitoring of the system.
[0051] It will be apparent to those skilled in the art that the safety interlock mechanism 100 of the disclosure may be provided using some or all of the mentioned features and components without departing from the scope of the present disclosure. While various embodiments of the present disclosure have been illustrated and described herein, it will be clear that the disclosure is not limited to these embodiments only. Numerous modifications, changes, variations, substitutions, and equivalents will be apparent to those skilled in the art, without departing from the spirit and scope of the disclosure, as described in the claims.
ADVANTAGES OF THE PRESENT INVENTION
[0052] The present disclosure provides a safety interlock mechanism that effectively prevents inadvertent or unauthorized rack-in and rack-out operations when the MCCB is in the ON/TRIP state
[0053] The present disclosure provides a safety interlock mechanism that facilitates maintenance activities, allowing for efficient handling of the draw-out mechanism when the circuit breaker is not in active use.
[0054] The present disclosure provides a safety interlock mechanism that ensures that the essential components remain securely in place during operation, preventing any unintended disassembly that could compromise the integrity of the circuit breaker when the MCCB is in the ON state.
[0055] The present disclosure provides a safety interlock mechanism that prevents potential operational errors or electrical issues that may arise during these critical transition phases, enhancing overall system safety.
[0056] The present disclosure provides a safety interlock mechanism that provides clear and reliable information about the current state of the mechanism, allowing operators to easily identify whether the circuit breaker is in the connect, test, or disconnect position. This enhances operational awareness and contributes to efficient monitoring of the system.
, Claims:1. A safety interlock mechanism (100) comprising:
a draw-out interlock element (104) positioned on an upper base of an electrically operating mechanism (EOM) (114), the draw-out interlock element configured to selectively obstruct a slot (108) of a draw-out mechanism; and
a handle (102) is inserted into the slot of the draw-out mechanism to rack-in and rack-out a circuit breaker, thereby connecting or disconnecting the circuit breaker from a main supply, wherein the draw-out interlock element (104) obstructs the slot (108) through which the handle (102) is inserted to restrict operation of the draw-out mechanism when the circuit breaker is in ON condition, thereby mitigating possibility of an electrical hazard.
2. The safety interlock mechanism as claimed in claim 1, wherein at the ON or TRIP state of the circuit breaker, a rack (110) is projected (112) and the projection on the rack (110) strikes the draw-out interlock element (104), initiating a counter-clockwise rotation that obstructs the slot through which the handle is to be inserted.
3. The safety interlock mechanism as claimed in claim 2, wherein the obstruction of the slot (108) by the draw-out interlock element (104) prevents users from accessing the draw-out mechanism, consequently impeding the rack-in and the rack-out operation when the circuit breaker is in the ON condition.
4. The safety interlock mechanism as claimed in claim 1, wherein at OFF state of the circuit breaker, the draw-out interlock element (104) is restored to original position by a restoration spring (106), thereby unobstructing the slot (108) and enabling the users to perform the rack-in and rack-out operations by inserting the handle (102).
5. The safety interlock mechanism as claimed in claim 1, wherein the draw-out interlock element (104) is obstructed when the circuit breaker is in transitional stages between connect and test position and test and disconnect position, preventing the users from turning the circuit breaker to the ON state during intermediate phases.
6. The safety interlock mechanism as claimed in claim 1, wherein at the ON state of the circuit breaker, the draw-out interlock element (104) ensures that the EOM (114) cannot be unmounted from the circuit breaker, maintaining safety and compliance.
7. The safety interlock mechanism as claimed in claim 1, wherein when the circuit breaker is racked-in and racked-out from the draw-out mechanism, the indication component of the EOM (114) hits a rotary component in the draw-out mechanism thus providing indications of three distinct positions of the draw-out mechanism.
8. The safety interlock mechanism as claimed in claim 7, wherein the three distinct positions of the draw-out mechanism pertain to connect, disconnect, and test position.
9. The safety interlock mechanism as claimed in claim 1, wherein the EOM (114) comprises a motor and an epicyclic gear assembly operatively configured with a motor shaft of the motor, such that the rotation of the motor shaft facilitates the rotation of the epicyclic gear assembly, further facilitating the rotation of a drive shaft.
10. The safety interlock mechanism as claimed in claim 9, wherein the drive shaft is operatively configured with the rack (110), wherein the rack is configured to move linearly, resulting in switching ON/OFF of the circuit breaker.
| # | Name | Date |
|---|---|---|
| 1 | 202311084233-STATEMENT OF UNDERTAKING (FORM 3) [11-12-2023(online)].pdf | 2023-12-11 |
| 2 | 202311084233-REQUEST FOR EXAMINATION (FORM-18) [11-12-2023(online)].pdf | 2023-12-11 |
| 3 | 202311084233-POWER OF AUTHORITY [11-12-2023(online)].pdf | 2023-12-11 |
| 4 | 202311084233-FORM 18 [11-12-2023(online)].pdf | 2023-12-11 |
| 5 | 202311084233-FORM 1 [11-12-2023(online)].pdf | 2023-12-11 |
| 6 | 202311084233-DRAWINGS [11-12-2023(online)].pdf | 2023-12-11 |
| 7 | 202311084233-DECLARATION OF INVENTORSHIP (FORM 5) [11-12-2023(online)].pdf | 2023-12-11 |
| 8 | 202311084233-COMPLETE SPECIFICATION [11-12-2023(online)].pdf | 2023-12-11 |
| 9 | 202311084233-Proof of Right [31-05-2024(online)].pdf | 2024-05-31 |