The present disclosure relates, in general, to protection devices, and
more specifically, relates to a withdrawable unit of circuit breakers.
BACKGROUND
[0002] Conventional electrical distribution systems employ switch gears that
house withdrawable units. Each withdrawable unit houses one or more electrical switching devices such as circuit breakers. The withdrawable units releasably connected the electrical switching devices to an electrical busbar. Periodically, the withdrawable units are operated to disconnect the electrical switching devices from the busbar for maintenance, servicing or replacement purposes. Toward that end, the withdrawable units have discrete positions for installing and removing an associated switching device. Certain withdrawable units also include a test position wherein an associated circuit breaker is disconnected from the main circuit, yet can still be closed, opened, or tripped in order to test/check internal and external accessories such as auxiliary switches provided on the circuit breaker. Conventional withdrawable units/plug-in module has two distinct positions, connect position and disconnect position.
[0003] Few existing mechanisms of withdrawable units that houses the circuit
breakers suffer from limitations such as circuit breaker at disconnect position may
fall due to shock and vibration, lack of positive feedback for plug-in and out, the
current range of plug-in does not use a mechanism to plug-in the circuit breaker,
which sometimes results in high force of insertion and lack of position lock.
[0004] Therefore, there is a need in the art to develop a simple and cost-
effective device that enables position lock for safe and authorized operation, interlocks withdrawable unit circuit breaker/ moving kit with a cradle or fixed kit at distinct positions and can be a miniature for use in any field for purpose of locking.

OBJECTS OF THE PRESENT DISCLOSURE
[0005] An object of the present disclosure relates, in general, to protection
devices, and more specifically, relates to a withdrawable unit of circuit breakers.
[0006] Another object of the present disclosure is to provide a device that
provides safety to the operator and to prevent any inadvertent practices.
[0007] Another object of the present disclosure is to provide a device that
automatically locks circuit breaker at distinct positions during plug-in/plug-out.
[0008] Another object of the present disclosure is to provide a mechanism to
plug-in the circuit breaker, resulting in much less force of insertion.
[0009] Another object of the present disclosure is to provide a device that
enables the positive interlocking of both fixed units and moving units.
[0010] Another object of the present disclosure is to provide a padlock for the
locking device to ensure authorized operation.
[0011] Another object of the present disclosure is to provide a device that
enables auto-release of the lock that keeps the system ready to be locked at the next
position
[0012] Another object of the present disclosure is to provide a device that
provides user acknowledgement to unlock the mechanism for navigation of circuit
breaker to distinct position to assures the safety of the operator.
[0013] Another object of the present disclosure is to provide a device that can
be operated easily.
[0014] Yet another object of the present disclosure is to provide device that
has a mechanism to drive the circuit breaker to different positions effortlessly.
SUMMARY
[0015] The present disclosure relates, in general, to protection devices, and
more specifically, relates to a withdrawable-unit of circuit breakers. The device of the present disclosure enables to overcome the limitations by locking the breaker at three distinct positions by means of the mechanism, which gets activated by actuation of the breaker in the cradle to safeguard the user and the system against inadvertent practices or situations.

[0016] In an aspect, the present disclosure provides a device for locking and
unlocking at multiple defined positions in circuit breakers, the device comprising a movable unit moveably mounted to a fixed unit, a driving mechanism having at least two driver plates configured in the fixed unit, the at least two driver plates drives the moveable unit to distinct positions, the movable unit being moveable between a first position wherein the circuit breaker is in a connect configuration, a second position wherein the circuit breaker is in a disconnect configuration, and a third position wherein the circuit breaker is in a take-away position (withdrawn position), a locking mechanism associated with the moveable unit, the locking mechanism coupled to right-side plate of the fixed unit wherein a lock pin in the locking mechanism, upon actuation of a push button, adapted to lock and unlock the at least two driver plates at distinct positions; and a wedge member of the locking mechanism adapted to automatically release the lock in response to a movement of the movable unit between first position, second position and third position.
[0017] According to an embodiment, at least two driver plates of the driving
mechanism comprise locking holes and a dome rivet at certain distances.
[0018] According to an embodiment, the lock pin coupled to a locker in a
locker assembly, wherein the at least two driver plates are rotated to allow the lock pin to pass through the locking hole to lock the at least two driver plates at distinct positions, wherein the at least two driver plates, upon actuation of push button, is rotated to allow the lock pin to pass out of the locking hole to unlock the at least two driver plates.
[0019] According to an embodiment, the wedge member can include a push
button wedge, a push button wedge protrusion, a locker wedge and a locker wedge protrusion.
[0020] According to an embodiment, upon actuation of the push button, the
push button wedge slides over the locker wedge releasing the locker assembly, wherein the lock pin is released out of the locking hole to unlock the driving mechanism.

[0021] According to an embodiment, at the unlock position, push button
wedge protrusion and the locker protrusion is inter-locked by resting against a push
button limb.
[0022] According to an embodiment, the at least two driver plates, upon
rotation, pushes the lock pin by the dome rivet which automatically releases the
lock state of the wedge member.
[0023] According to an embodiment, the lock pin is enabled for locking at the
next position by means of automatic release of the wedge member and push button.
[0024] According to an embodiment, the locking and unlocking is performed
automatically by spring members, the locking and unlocking of the push button is
padlocked by a padlock lever for authorized operation.
[0025] According to an embodiment, the padlock lever comprises of a
padlock pip which engages with a pushbutton cavity and remains in that position
by locks locked through holes.
[0026] 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
[0027] 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.
[0028] FIG. 1A illustrate exemplary moveable unit of the withdrawable
device, in accordance with an embodiment of the present disclosure.
[0029] FIG. IB illustrate exemplary fixed unit of the withdrawable device, in
accordance with an embodiment of the present disclosure.
[0030] FIG. 1C illustrate exemplary schematic view of withdrawable device
in take-away position, in accordance with an embodiment of the present disclosure.

[0031] FIG. ID illustrate exemplary schematic view of withdrawable device
in connected position, in accordance with an embodiment of the present disclosure.
[0032] FIG. IE illustrate exemplary schematic view of driving mechanism,
in accordance with an embodiment of the present disclosure.
[0033] FIG. IF illustrate exemplary schematic view of driver plate of driving
mechanism, in accordance with an embodiment of the present disclosure.
[0034] FIG. 2 A illustrate exemplary schematic view of locking of the driving
mechanism by push button lock, in accordance with an embodiment of the present
disclosure.
[0035] FIG. 2B illustrate exemplary schematic view of push button and locker
interlocked by wedge step, in accordance with an embodiment of the present
disclosure.
[0036] FIG. 2C illustrate exemplary view of unlocking of the driving
mechanism by pressing the push button, in accordance with an embodiment of the
present disclosure.
[0037] FIG. 2D illustrate exemplary view of auto-release of the push button
by push from dome rivet on lock pin, in accordance with an embodiment of the
present disclosure.
[0038] FIG. 2E illustrate exemplary view of locker assembly, in accordance
with an embodiment of the present disclosure.
[0039] FIG. 2F illustrate exemplary view of locker, in accordance with an
embodiment of the present disclosure.
[0040] FIG. 2G illustrate exemplary side view of locker, in accordance with
an embodiment of the present disclosure.
[0041] FIG. 2H illustrate exemplary side view of lock pin, in accordance with
an embodiment of the present disclosure.
[0042] FIG. 21 illustrate exemplary side view of push button, in accordance
with an embodiment of the present disclosure.
[0043] FIG. 2J illustrate exemplary side view of push button cavity, in
accordance with an embodiment of the present disclosure.

[0044] FIG. 3 illustrate exemplary schematic view of padlock, in accordance
with an embodiment of the present disclosure
DETAILED DESCRIPTION
[0045] 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. However, the amount of detail offered is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present disclosure as defined by the appended claims.
[0046] 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.
[0047] 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.
[0048] The present disclosure relates, in general, to protection devices, and
more specifically, relates to a withdrawable unit of circuit breakers. In an embodiment, the device of the present disclosure enables to overcome the limitations by locking the breaker at three distinct positions by means of the mechanism, which gets activated by actuation of the breaker in the cradle to safeguard the user and the system against inadvertent practices or situations. The three distinct positions can include connected, disconnected and take-away/withdrawn positions.
[0049] Conventionally, the plug-in has two positions i.e., connected and
disconnected, where plug-in and plug-out of the breaker is done manually by inserting the moving kit directly to the plug-in by an operator without any specific mechanism. The device of the present disclosure enables to overcome the

limitations by proving an advanced plug-in, a mechanism aids in plugging of the
moving kit. The device of the present disclosure enables user acknowledgement to
unlock the mechanism for navigation of circuit breaker to distinct position to assure
the safety of the operator. The present disclosure can be described in enabling detail
in the following examples, which may represent more than one embodiment of the
present disclosure. 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.
[0050] FIG. 1A illustrate exemplary moveable unit of the withdrawable
device, in accordance with an embodiment of the present disclosure.
[0051] Referring to FIG. 1 A, a device 100 (also referred to as a withdrawable
unit 100, herein (FIG. 1C)) assembled with a circuit breaker. The device 100 can include a moveable unit 102 (also interchangeably referred to as moving kit 102, herein) that is plugged to a fixed unit 104 (also interchangeably referred to as fixed unit 104, herein) as shown in FIG. IB by a mechanism, where the mechanism can drive the circuit breaker to different positions effortlessly.
[0052] The moveable unit 102 can include the circuit breaker, a rear plate
assembly and an actuator screwed together. The fixed unit 104 can include a plug-in unit, which has female conducting parts in a solid housing called a plug-in base. A right-side plate 106-1 and left-side plate 106-2 are screwed to the plug-in base of the fixed unit 104. There are slots cut out in the left-side plate 106-2 and the right-side plate 106-1, which guide the moveable unit 102 into the fixed unit 104. The moveable unit 102 is loaded into the fixed kit 104 with respect to the rail guides 116 and guide pins 118 and slide in the cradle.
[0053] In an embodiment, the moveable unit 102 is plugged into the fixed
unit 104 by means of a driving mechanism 108 shown in FIG. IB, where the driving mechanism 108 is hinged to the right-side plate 106-1. The driving mechanism 108

can include at least two driver plates 110 (also referred to as driver plates 110,
herein) to which driving pins are rivetted, which drives the moveable unit 102 to
three distinct positions. The movable unit 102 being moveable between a first
position wherein the circuit breaker is in a connect configuration, a second position
wherein the circuit breaker is in a disconnect configuration, and a third position
wherein the circuit breaker is in a take-away position (withdrawn position).
[0054] In connect position, the circuit breaker is connected to the main
supply. In disconnect position, the circuit breaker is disconnected from the supply but still engaged with the driving mechanism 108 to prevent circuit breaker fall due to any mis-advent practices, shock and vibration from the fixed unit 104 and user acknowledgement are necessary to take out the circuit breaker from fixed unit 104 as an extra safety. In the take-away/withdrawn position, the circuit breaker is withdrawn from the fixed unit 104. The circuit breaker is held in the determined three positions by a position lock mechanism 114 shown in FIG. 1C. The locking mechanism 114 is associated with the moveable unit 102, where a lock pin 204 is shown in FIG. 2A in the locking mechanism, upon actuation of a push button 202, adapted to lock and unlock the driver plates 110 at distinct positions. Also, unlike the conventional plug-in module, the proposed device 100 has the mechanism to drive the breaker to different positions effortlessly.
[0055] The circuit breaker or moulded case circuit breaker (MCCB) is driven
to the various positions by means of the driving mechanism 108. The driving mechanism 108 can include the driver plate 110 which has pins rivetted on it. Those pins engage with the rear coupler in the moving kit 102 assembly consisting of the MCCB. By manual movement of the driver plates 110 by the operator, the movable unit 102 attains the various positions i.e., take-away, disconnected and connected position.
[0056] Locking of the movable unit 102 at a distinct position can be optimized
so that the movable unit 102 is arrested properly and does not pose any danger to the user. It should also be taken into consideration that the movable unit 102 is not locked prematurely at a certain position. The lock pin 204 is designed to lock the driving plate 110 in order to prevent its movement resulting in loss of transmission

to the movable unit 102. The lock pin 204 is disengaged by means of the push button
202 and wedge mechanism. The lock pin 204 is again made ready for locking by
means of auto-release of the wedge and push button. Unless the push button 202 is
pressed, the lock pin 204 is not disengaged, and the driving plate 110 cannot be
driven. This ensures locking of the movable unit 102 at distinct positions.
[0057] The driver plate 110 can include dome rivet 120 and locking holes 122
at certain positions is shown in FIG. IE and FIG. IF respectively. The driver plate 110 of the driving mechanism 108 has locking holes 122 cut out at certain distances. The user shall rotate the driver plate 110 of the driving mechanism 108 clockwise holding a driver plate holder 112 towards the fixed kit 104 in order to plug-in the moveable unit 102. The holes 122 cut-out in the driver plate 110 of the driving mechanism 108 allows the lock pin 204 to pass in and lock the driver plate 110, hence, locking the driving mechanism 108 which prevents plug-in of the movable unit 102.
[0058] In an embodiment, the push button lock mechanism 114 shown in FIG.
1C is fixed/fastened to the right-side plate 106-1. The push button lock mechanism 114 can include push button 202, a push button spring 206, a locker 220 shown in FIG. 2F, the lock pin 204, a locker spring 208 and a cover shown in FIG. 2A and 2B respectively.
[0059] The lock pin 204 coupled to the locker 220 in a locker assembly 224,
wherein the driver plates 110 is rotated to allow the lock pin 204 to pass through the locking hole 112 to lock the driver plates at distinct positions. The driver plates 110, upon actuation of push button, is rotated to allow the lock pin 204 to pass out of the locking hole 112 to unlock the driver plates. Spring members (206, 208) automatically perform the locking and unlocking operation. The push button 202 has the push button spring 206 against it which is a compression spring and helps in pop out of the push button 202. The locker 220 has the lock pin 204 assembled to it and has the locker spring 208 which is also a compression spring against it. The push button 202 and the locker 220 have a wedge/wedge member, where the wedge principle is followed in this kind of lock. The wedge principle relates to an inclined plane is a sloping surface in which a small force acting along the slope can

produce a larger force. The wedge member of the locking mechanism 114 adapted
to automatically release the lock in response to a movement of the movable unit
102 between the first position, second position and third position.
[0060] In an implementation, the device 100 can perform locking function,
unlocking function and automatic release function.
[0061] Locking:
[0062] The driver plate 110 of the driving mechanism 108 has holes 122 cut-
out region at certain distances. The lock pin 204, which is assembled to the locker
220 passes through that hole locking the driver plate 110. The locker 220 is
assembled against the locker spring 208, which pushes the locker 220 out. The step
on 218 the lock pin is shown in FIG. 2H acts as a stopper against the side plate.
This is the natural position of the push button lock 114.
[0063] Un-locking:
[0064] When the push button 202 is pressed against the compression spring
206 force, by wedge action, the locker 220 along with lock pin 204 moves back
which unlocks the driver plate 110 of the driving mechanism 108. After pressing
the push button 202 by a certain distance, the push button wedge 216 shown in FIG.
21 ends, and the locker protrusion 212 (also referred to as locker step 212, herein)
gets locked by resting against a push button limb 210 shown in FIG, 2B. This
ensures that the mechanism stays in the unlocked position and one can rotate the
driving mechanism 108.
[0065] Automatic Release:
[0066] When the push button lock 114 is in the unlocked state, i.e., when the
locker wedge 222 is locked against the push button limb 210; both the compression springs, push button spring 206 and locker spring 208 are compressed. The driver plate 110 has dome rivets 120 assembled to it at certain positions. When the driver plate 110 rotates, the dome rivet 120 encounters the lock pin 204. This pushes the lock pin 204 along with the locker such that it overcomes the step in the push button wedge 216 which was locking it. Now, by virtue of push button spring 206, the push button 202 pops out again and by virtue of locker spring 208, the locker 220 is pushed out making it ready for locking again.

[0067] To plug-in the moveable unit 102 from the take-away position shown
in FIG. 1C, the push button 202 is actuated on the right-side plate 106-1 to navigate the moveable unit 102 by means of the driving plate 110 till it gets locked again automatically at the disconnect position from the take-away position. The push button 202 is actuated to unlock the operating/driving mechanism by unlocking the driver plate 110 and drive the moveable unit 102 to the next and final position i.e., connect position shown in FIG. ID. The working phenomena is same in case of plugging-out the moveable unit 102. The locking and unlocking of push button 202 are coupled with authorization lock or padlock 302 shown in FIG. 3 for the authorized operation of advance plug-in and plug-out.
[0068] To navigate the moveable unit 102 to the next position i.e., disconnect
position, the user shall press the push button 202 and acknowledge to unlock the driving mechanism 108. The user shall rotate the driver plate 110 of the driving mechanism 108 clockwise holding the driver plate holder 112 towards the fixed kit 104 in order to plug-in. During the rotation of the driver plate 110, the lock pin 204 is pushed by the dome rivet 120 automatically by its virtue of dome shape mounted on the driver plate 110, as well dome shape of the lock pin 204 releases the push button lock by overcoming the wedge protrusion 214 (also referred to as wedge step 214, herein) of the push button 202 and makes it ready to lock the driving mechanism 108 as soon as the lock pin 204 meets the locking hole 122 in the driver plate 110.
[0069] The push button 202 is released and pops out by means of the
compression spring 206. The locker assembly 224 is shown in FIG. 2E can include the locker 220 and the lock pin 204 is pushed towards the locking hole 122 after getting pushed by the dome rivet 120 and getting released from the push button wedge step 214 by means of another compression spring 208. The response of the elastic members is in such a way that the responsiveness of push button spring is greater than locker spring.
[0070] When actuating the push button 202, the wedge 216 of the push button
202 slides over the locker wedge 222 pushing it away, releasing the entire locker assembly 224. This pulls the lock pin 204 out of the locking hole 122 and unlocks

the driving mechanism 108. Both the push button compression spring 206 and the
locker compression spring 208 are compressed. To avoid immediate locking of the
driver plate 110 again by the lock pin 204, the limb 210 of the push button 202 stops
the locker assembly 224 to move ahead of a specific value. For the push button 202
to pop out immediately by virtue of push button spring 206, there is a push button
wedge step 214 and locker wedge step 212, where they get inter-locked. The user
comes to know that the lock pin 206 is engaged with the locking hole 122 by
listening to a 'Click' sound which comes due to the meeting of lock pin step 218
with right-side plate 106-1. Side protrusions 226 shown in FIG. 2J on the push
button act as the push button stoppers.
[0071] FIG. 2A illustrate exemplary schematic view of locking of the driving
mechanism by push button lock, in accordance with an embodiment of the present
disclosure.
[0072] Referring to FIG. 2A, the push button lock mechanism 114 can include
the push button 202, the push button spring 206, the locker 220 shown in FIG. 2F
and side view of locker shown in FIG. 2G, the lock pin 204 shown in FIG. 2H, the
locker spring 208 and the cover. The push button 202 have the push button wedge
216 and the push button wedge step 214 shown in FIG. 21. The locker 220 have the
locker wedge 222 shown in Fig. 2G and locker wedge step 212.
[0073] The driver plate 110 of the driving mechanism 108 has holes cut-out
region at certain distances. The lock pin 204, which is assembled to the locker 220
passes through that hole locking the driver plate 110. The locker 220 is assembled
against the locker spring 208, which pushes the locker 220 out. The step on the lock
pin 218 acts as a stopper against the side plate. This is the natural position of the
push button lock 114.
[0074] FIG. 2B illustrate exemplary schematic view of push button and locker
interlocked by wedge step, in accordance with an embodiment of the present
disclosure.
[0075] The holes cut out in the driver plate 110 of the driving mechanism 108
allows the lock pin 204 to pass in and lock the driver plate 110, hence, locking the
driving mechanism 108 which prevents plug-in. When actuating the push button

202, the wedge 216 of the push button 202 slides over the locker wedge 222 pushing it away, releasing the entire locker assembly 224. This pulls the lock pin 204 out of the locking hole 122 and unlocks the driving mechanism 108. Both the push button compression spring 206 and the locker compression spring 208 are compressed. To avoid immediate locking of the driver plate 110 again by the lock pin 204, the limb 210 of the push button 202 stops the locker assembly 224 to move ahead of a specific value. For the push button 202 to pop out immediately by virtue of push button spring 206, there is the push button wedge step 214 and locker wedge step 212, where they get inter-locked. The user comes to know that the lock pin 206 is engaged with the locking hole 122 by listening to a 'Click' sound which comes due to the meeting of lock pin step 218 with right-side plate 106-1. Side protrusions 226 on the push button act as the push button stoppers and push button cavity 228 shown in FIG. 2J.
[0076] FIG. 2C illustrate exemplary view of unlocking of the driving
mechanism by pressing the push button, in accordance with an embodiment of the present disclosure.
[0077] The driving mechanism 108 is unlocked by pressing the push button
202. At the unlock position, push button wedge protrusion 214 and the locker
protrusion 212 are inter-locked by resting against the push button limb 210. When
the push button 202 is pressed against the compression spring 206 force, by wedge
action, the locker 220 along with lock pin 204 moves back which unlocks the driver
plate 110 of the driving mechanism 108. After pressing the push button 202 by a
certain distance, the push button wedge 216 ends, and the locker step gets locked
by resting against the push button limb 210. This ensures that the mechanism stays
in the unlocked position and one can rotate the driving mechanism 108.
[0078] FIG. 2D illustrate exemplary view of auto-release of the push button
by push from dome rivet on lock pin, in accordance with an embodiment of the present disclosure. The driver plates 110, upon rotation, pushes the lock pin 204 by the dome rivet 120 which automatically releases the interlock state of the wedge member. When the push button lock 114 is in the unlocked state, i.e., when the locker wedge 218 is locked against the push button limb 210; both the compression

springs, push button spring 206 and locker spring 208 are compressed. The driver plate 110 has dome rivets 120 assembled to it at certain positions. When the driver plate 110 rotates, the dome rivet 120 encounters the lock pin 204. This pushes the lock pin 204 along with the locker such that it overcomes the step in the push button wedge 216 which was locking it. Now, by virtue of push button spring 206, the push button 202 pops out again and by virtue of locker spring 208, the locker 220 is pushed out making it ready for locking again.
[0079] FIG. 3 illustrate exemplary schematic view of padlock, in accordance
with an embodiment of the present disclosure
[0080] Referring to FIG. 3, the push button 202 can be padlocked by a
padlock lever 302. The padlock lever 302 has padlock pip 304 which engages with pushbutton cavity 228 and remains in that position by locks locked through holes 306. Three levels of safety are provided to prevent the push button from unlocking thus allowing only authorized operation.
[0081] The advantages achieved by the device of the present disclosure can
be clear from the embodiments provided herein. The device 100 of the present
disclosure provides safety to the operator, preventing any inadvertent practices,
automatically locks circuit breaker at distinct positions during plug-in/plug-out and
enables positive interlocking of both fixed unit and moving unit. The mechanism
of the device enables to plug-in of the circuit breaker, resulting in much less force
of insertion. The present disclosure provides the device with the padlock for the
locking device to ensure authorized operation. The device 100 enables auto-release
of the lock that keeps the system ready to be locked at the next position, provides
user acknowledgement to unlock the mechanism for navigation of circuit breaker
to distinct position to assure the safety of the operator, operated easily and has a
mechanism to drive the circuit breaker to different positions effortlessly.
[0082] It will be apparent to those skilled in the art that the device 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 DISCLOSURE
[0083] The present disclosure provides a device that provides safety to the
operator and prevents any inadvertent practices.
[0084] The present disclosure provides a device that automatically locks
circuit breakers at distinct positions during plug-in/plug-out.
[0085] The present disclosure provides a device that enables the positive
interlocking of both fixed units and moving units.
[0086] The present disclosure provides a device with a padlock for the
locking device to ensure authorized operation.
[0087] The present disclosure provides a device that enables the auto-release
of the lock that keeps the system ready to be locked at the next position
[0088] The present disclosure provides a device that provides user
acknowledgement to unlock the mechanism for navigation of circuit breaker to
distinct position to assures the safety of the operator.
[0089] The present disclosure provides a device that can be operated easily.
[0090] The present disclosure provides a device that has a mechanism to drive
the circuit breaker to different positions effortlessly.
[0091] The present disclosure provides a mechanism to plug-in the circuit
breaker, resulting in much less force of insertion.

We Claim:

1. A device (100) for locking and unlocking at multiple defined positions in
circuit breakers, the device comprising:
a movable unit (102) moveably mounted to a fixed unit (104);
a driving mechanism (108) having at least two driver plates (110) configured in the fixed unit (104), said at least two driver plates drives the moveable unit to distinct positions, said movable unit being moveable between a first position wherein the circuit breaker is in a connect configuration, a second position wherein the circuit breaker is in a disconnect configuration, and a third position wherein the circuit breaker is in a take-away position;
a locking mechanism (114) associated with the moveable unit, the locking mechanism coupled to right-side plate (106-1) of the fixed unit, wherein a lock pin (204) in the locking mechanism, upon actuation of a push-button (202), adapted to lock and unlock the at least two driver plates at distinct positions; and
a wedge member of the locking mechanism (114) adapted to automatically release the lock in response to a movement of the movable unit between first position, second position and third position.
2. The device as claimed in claim 1, wherein said at least two driver plates (110) of the driving mechanism (108) comprise locking holes (122) and a dome rivet (120) at certain distances.
3. The device as claimed in claim 1, wherein said lock pin (204) coupled to a locker (220) in a locker assembly (224), wherein said at least two driver plates (110) are rotated to allow the lock pin (204) to pass through the locking hole (112) to lock the at least two driver plates at distinct positions, wherein said at least two driver plates (110), upon actuation of push button, is rotated to allow the lock pin (204) to pass out of the locking hole (112) to unlock the at least two driver plates.

4. The device as claimed in claim 1, wherein said wedge member comprises a push button wedge (216), a push button wedge protrusion (214), a locker wedge (222) and a locker wedge protrusion (212).
5. The device as claimed in claim 1, wherein upon actuation of the push button (202), the push button wedge (216) slides over the locker wedge (222) releasing the locker assembly (224), wherein the lock pin (204) is released out of the locking hole (122) to unlock the driving mechanism (108).
6. The device as claimed in claim 5, wherein at the unlock position, push button wedge protrusion (214) and the locker protrusion (212) are inter-locked by resting against a push button limb (210).
7. The device as claimed in claim 6, wherein the at least two driver plates, upon rotation, pushes the lock pin (204) by the dome rivet (120) which automatically releases the lock state of the wedge member.
8. The device as claimed in claim 7, wherein the lock pin (204) is enabled for locking at the next position by means of automatic release of the wedge member and push button.
9. The device as claimed in claim 1, wherein the locking and unlocking is performed automatically by spring members (206, 208), the locking and unlocking of the push button is padlocked by a padlock lever (302) for authorized operation.
10. The device as claimed in claim 9, wherein the padlock lever (302) comprises of a padlock pip (304) which engages with a pushbutton cavity (228) and remains in that position by locks locked through holes (306).