The present disclosure relates to the field of circuit breaker. More
particularly the present disclosure relates to a magnetic tripping coil assembly for the circuit breakers.
BACKGROUND
[0002] Background description includes information that may be useful in
understanding the present invention. It is not an admission that any of the
information provided herein is prior art or relevant to the presently claimed
invention, or that any publication specifically or implicitly referenced is prior art.
[0003] Magnetic Trip Coil assembly is conventionally used in the
switchgears where no auxiliary supply is available to trip the circuit breaker in case of a fault condition. Usually, switchgears of wind farm applications where it is difficult to arrange the auxiliary supply are having the prime requirement of Magnetic Trip coil assembly. Magnetic trip coil assembly is an electro-mechanical device that stores the energy in spring incorporated in magnetic coil and releases its energy after receiving specific minimum electrical pulse. A Plunger inside the magnetic coil travels from initial position to final position with the help of spring. The plunger is held in the Initial position with the help of permanent magnet. To release the plunger from initial position, a low power voltage is given to the coil. As the minimum electrical impulse is given to the coil, the plunger leaves the contact with the permanent magnet and now, the spring inside the coil applies force on the plunger and takes it to the final position. The overall output force of the magnetic tripping coil is given by the spring inside the coil and electromagnetic force generated from electrical pulse. With increase in GIS Rating, moving mass in closing and tripping is also increasing and hence sometimes more force is required to trip the breaker.
[0004] There is, therefore, a need for a coil that can give more Force with
minimum electrical input pulse.

OBJECTS OF THE PRESENT DISCLOSURE
[0005] Some of the objects of the present disclosure, which at least one
embodiment herein satisfy are as listed herein below.
[0006] It is an obj ect of the present disclosure to provide a magnetic tripping
coil assembly for circuit breaker.
[0007] It is an obj ect of the present disclosure to provide a magnetic tripping
coil assembly for circuit breaker, which is simple and easy to use.
[0008] It is an obj ect of the present disclosure to provide a magnetic tripping
coil assembly for circuit breaker, which is cost effective.
[0009] It is an obj ect of the present disclosure to provide a magnetic tripping
coil assembly for circuit breaker, which requires less maintenance cost.
[0010] It is an object of the present disclosure to provide a magnetic tripping
coil assembly for circuit breaker, which provide additional force to plunger of
magnetic coil for tripping the circuit breaker in case of any fault condition.
SUMMARY
[0011] The present disclosure relates to the field of circuit breaker. More
particularly the present disclosure relates to a magnetic tripping coil assembly for the circuit breakers.
[0012] An aspect of the present disclosure pertains to a magnetic tripping
coil assembly adapted to be configured in a circuit breaker. The magnetic tripping coil assembly includes a mounting frame. A magnetic coil is configured on the mounting frame, and the magnetic coil comprises a plunger configured to be actuated in case of any fault condition in the circuit breaker. A bracket pivotally configured, from a first centre, with the mounting frame such that a first end of the bracket is operatively configured with the plunger, and configured to be pressed by the plunger. The bracket comprises an extended element at the first end A trip shaft position below the extended element and configured to be rotated corresponding to the pressing of the first end to facilitate circuit breaker tripping. A rest link ooerativelv confisured with a second end of the bracket, and confisured to reset the

assisting the circuit breaker tripping. The latch assembly includes a latch
operatively configured, from a second centre, with the mounting frame, and the
latch comprises a third end and a fourth end, the third end is elastically coupled at
a pre-defined location of the mounting frame.
[0013] In an aspect, the third end may be elastically coupled with the
mounting frame through spring, and the latch is configured to rotate, on its axis,
against a spring force to store energy in the spring in response to a movement of the
rest link.
[0014] In an aspect, after storing the energy in the spring, the latch may be
held in the same position using a stopping member configured to engage with the
fourth end.
[0015] In an aspect, the stopping member may be configured to disengage
from the fourth end at the same time when the bracket moves due to the plunger
actuation, thereby, the stored energy in the spring is delivered to the bracket
facilitating assistance in the circuit breaker tripping.
[0016] 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 DRAWINGS
[0017] The accompanying drawings are included to provide a further
understanding of the present disclosure, and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure. The diagrams are for illustration only, which thus is not a limitation of the present disclosure.
[0018] In the figures, similar components and/or features may have the
same reference label. Further, various components of the same type may be distinguished by following the reference label with a second label that distinguishes among the similar components. If only the first reference label is used in the

specification, the description applies to any one of the similar components having
the same first reference label irrespective of the second reference label.
[0019] FIG. 1 illustrate an exemplary representation of magnetic tripping
coil assembly, according to an aspect of the present disclosure.
[0020] FIG. 2A-C illustrate an exemplary representation of a section of the
magnetic tripping coil assembly, according to an aspect of the present disclosure.
DETAILED DESCRIPTION
[0021] 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 scope of the present disclosure as defined by the appended claims.
[0022] In the following description, numerous specific details are set forth
in order to provide a thorough understanding of embodiments of the present
invention. It will be apparent to one skilled in the art that embodiments of the
present invention may be practiced without some of these specific details.
[0023] The present disclosure relates to the field of circuit breaker. More
particularly the present disclosure relates to a magnetic tripping coil assembly for the circuit breakers.
[0024] The present disclosure elaborates upon a magnetic tripping coil
assembly adapted to be configured in a circuit breaker. The magnetic tripping coil assembly includes a mounting frame. A magnetic coil is configured on the mounting frame, and the magnetic coil comprises a plunger configured to be actuated in case of any fault condition in the circuit breaker. A bracket pivotally configured, from a first centre, with the mounting frame such that a first end of the bracket is operatively configured with the plunger, and configured to be pressed by the plunger. The bracket comprises an extended element at the first end A trip shaft position below the extended element and configured to be rotated corresponding to the pressing of the first end to facilitate circuit breaker tripping. A rest link

operatively configured with a second end of the bracket, and configured to reset the plunger. A latch assembly operatively configured with the mounting frame for assisting the circuit breaker tripping. The latch assembly includes a latch operatively configured, from a second centre, with the mounting frame, and the latch comprises a third end and a fourth end, the third end is elastically coupled at a pre-defined location of the mounting frame.
[0025] In an embodiment, the third end can be elastically coupled with the
mounting frame through a spring, and the latch is configured to rotate, on its axis, against a spring force to store energy in the spring in response to a movement of the rest link.
[0026] In an embodiment, after storing the energy in the spring, the latch
can be held on the same position using a stopping member configured to engage with the fourth end.
[0027] In an embodiment, the stopping member can be configured to
disengage from the fourth end at the same time when the bracket moves due to the plunger actuation, thereby, the stored energy in the spring is delivered to the bracket facilitating assistance in the circuit breaker tripping.
[0028] FIG. 1 illustrate an exemplary representation of magnetic tripping
coil assembly, according to an aspect of the present disclosure.
[0029] FIG. 2A-C illustrate an exemplary representation of a section of the
magnetic tripping coil assembly, according to an aspect of the present disclosure.
[0030] As illustrated, a magnetic tripping coil assembly 100 adapted to be
configured in a circuit breaker can includes a mounting frame 102. The mounting frame 102 can facilitate mounting one or more components of the assembly 100. A magnetic coil 104 can be configured or mounted on the mounting frame 102. The magnetic coil 104 can include a plunger 118 that can be configured to be actuated in case of any fault condition in the circuit breaker. The magnetic coil can be configured to receive an electric pulse in case of any fault condition. The received electric pulse can actuate the plunder, and the plunger can be configured to move from a first retracted position to a second extended position.

[0031] In an embodiment, a bracket 106 can be pivotally configured or
mounted with the mounting frame 102. The bracket 106 can include a first end 106-1 and a second end 106-2 and the bracket is mounted such that the first end 106-1 of the bracket can be operatively configured with the plunger 118 when the plunger is at the second extended position. When the plunger is moved from the first retracted position to the second extended position, the plunger can be configured to be pressed by the first end 106-1 of the bracket 106. The bracket 106 can include an extended element 116 that can be at the first end 106-1.
[0032] In an embodiment, a trip shaft 108 can be position below the
extended element 116 and can be configured to be rotated, corresponding to the pressing of the first end, to facilitate circuit breaker tripping. The trip shaft can include a paddle 120 that can be positioned below the extended element 116. While pressing the first end 106-1, by the plunger 118, the paddle 120 can be correspondingly pressed by the extended element 120 facilitating the rotation of the tripping shaft 108.
[0033] In an embodiment, a rest link 110 can be operatively configured with
the second end 106-2of the bracket 106. The reset link 110 can be configured to
reset the plunger 118 after the plunger is actuated and the plunger 118 is at the
second extended position. A latch assembly can be operatively configured with the
mounting frame 102 for assisting the circuit breaker tripping. The latch assembly
can include a latch 112 that can be operatively configured, from a second centre,
with the mounting frame 102. The latch can include a third end 112-1 and a fourth
end 112-2. The third end 112-2 can be elastically coupled with the mounting frame
102, at a predefined location, through an elastic element 114.
[0034] In an embodiment, the latch 112 can be configured to rotate, on its
axis, against a spring force. This can facilitate storing energy in the spring in response to an upward movement of the rest link 110. After storing the energy in the spring, the latch 112 can be held on the same position using a stopping member 122 configured to engage with the fourth end 112-2. The stopping member 122 can be configured to disengage from the fourth end 112-2 at the same time when the bracket 102 starts moving due to the plunger actuation. This can facilitate delivering

the stored energy in the spring the bracket 106 and can assist in the circuit breaker tripping action.
[0035] Moreover, in interpreting the specification, all terms should be
interpreted in the broadest possible manner consistent with the context. In particular, the terms "comprises" and "comprising" should be interpreted as referring to elements, components, or steps in a non-exclusive manner, indicating that the referenced elements, components, or steps may be present, or utilized, or combined with other elements, components, or steps that are not expressly referenced. Where the specification claims refer to at least one of something selected from the group consisting of A, B, C ....and N, the text should be interpreted as requiring only one element from the group, not A plus N, or B plus N, etc.
[0036] While the foregoing describes various embodiments of the
invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof. The scope of the invention is determined by the claims that follow. The invention is not limited to the described embodiments, versions or examples, which are included to enable a person having ordinary skill in the art to make and use the invention when combined with information and knowledge available to the person having ordinary skill in the art.
ADVANTAGES OF THE INVENTION
[0037] The proposed invention provides a magnetic tripping coil assembly
for circuit breaker.
[0038] The proposed invention provides a magnetic tripping coil assembly
for circuit breaker, which is simple and easy to use.
[0039] The proposed invention provides a magnetic tripping coil assembly
for circuit breaker, which is cost effective.
[0040] The proposed invention provides a magnetic tripping coil assembly
for circuit breaker, which requires less maintenance cost.
[0041] The proposed invention provides a magnetic tripping coil assembly
for circuit breaker, which is highly reliable.

[0042] The proposed invention provides a magnetic tripping coil assembly
for circuit breaker, which provide additional force to plunger of magnetic coil for tripping the circuit breaker in case of any fault condition.

We Claim:

1. A magnetic tripping coil assembly adapted to be configured in a circuit
breaker, the magnetic tripping coil assembly comprising:
a mounting frame;
a magnetic coil configured on the mounting frame, wherein the magnetic coil comprises a plunger configured to be actuated in case of any fault condition in the circuit breaker;
a bracket coupled pivotally configured, from a first centre, with the mounting frame such that a first end of the bracket is operatively configured with the plunger, and configured to be pressed by the plunger, wherein the bracket comprises an extended element at the first end;
a trip shaft position below the extended element and configured to be rotated corresponding to the pressing of the first end to facilitate circuit breaker tripping;
a rest link operatively configured with a second end of the bracket, and configured to reset the plunger; and
a latch assembly pivotally configured with the mounting frame for assisting the circuit breaker tripping, the latch assembly comprising:
a latch operatively configured, from a second centre, with the
mounting frame, and the latch comprises a third end and a fourth
end, the third end is elastically coupled at a pre-defined location of
the mounting frame.
2. The magnetic tripping coil assembly as claimed in claim 1, wherein the third end is elastically coupled with the mounting frame through a spring, and the latch is configured to rotate, on its axis, against a spring force to store energy in the spring in response to a movement of the rest link.
3. The magnetic tripping coil assembly as claimed in claim 1, wherein after storing the energy in the spring, the latch is held on the same position using a stopping member configured to engage with the fourth end.

4. The magnetic tripping coil assembly as claimed in claim 2, wherein the stopping member is configured to disengage from the fourth end at the same time when the bracket moves due to the plunger actuation, thereby, the stored energy in the spring is delivered to the bracket facilitating assistance in the circuit breaker tripping.