Description:TECHNICAL FIELD
[0001] The present disclosure relates to thermal and magnetic release. More particularly the present disclosure relates an arrangement for controlling one or more parameters of thermal and magnetic release.

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] Circuit breakers are generally used to protect any device from overload and short circuit faults. The molded case circuit breakers subsystems include such as mechanism, contact system, and release. The release can be either electronic or thermal magnetic releases. This invention specifically relates to the thermal magnetic release. The thermal magnetic release uses electromagnetic coils to provide short circuit protection, and bimetal to provide overload protection. The overload condition can be explained in simple terms as higher current (not as high as short circuit) persisting for long time. The system will be designed to carry a specific rated current for a period based on its duty cycle. If higher current (overload current) flows in the system for longer periods, then the system will not be able to dissipate the excess heat generated because of the overload and ultimately the system will break down. Every release has a defined overload and overcurrent ratings. For different ratings individual releases are required which increases cost.
[0004] There is, therefore, a need for an arrangement for controlling rating parameters of the release and can work on different rating values, which is free from the above discussed problems.

OBJECTS OF THE PRESENT DISCLOSURE
[0005] Some of the objects of the present disclosure, which at least one embodiment herein satisfy are as listed hereinbelow.
[0006] It is an object of the present disclosure to provide an arrangement for controlling one or more rating parameters of a release, which allow same release to work on different overcurrent and overload condition/rating.
[0007] It is an object of the present disclosure to provide an arrangement for controlling one or more rating parameters of a release, which is effective and easy to use as the rating parameters of the release can be varied by rotating knobs.
[0008] It is an object of the present disclosure to provide an arrangement for controlling one or more rating parameters of a release, which is cost-effective as no complex electronic circuitry has been used.
[0009] It is an object of the present disclosure to provide an arrangement for controlling one or more rating parameters of a release, which requires less maintenance as no complex electronic circuitry has been used.
[0010] It is an object of the present disclosure to provide an arrangement for controlling one or more rating parameters of a release, which allows pole wise calibration.

SUMMARY
[0011] The present disclosure relates to thermal and magnetic release. More particularly the present disclosure relates an arrangement for controlling one or more parameters of thermal and magnetic release.
[0012] An aspect of the present disclosure pertains to an arrangement for controlling one or more rating parameters of a release configured with a switchgear. The arrangement includes an overload shaft operatively configured with a magnetic shaft of the thermal magnetic release, and the overload shaft comprises. An engaging protrusion, having first teeth, and one or more driving protrusions extending from the overload shaft, wherein each of the driving protrusions comprises a first end and a second end longer than the first end such that the first end and the second ends are coupled together with a sloped surface. A first rotating member operatively configured with the overload shaft. The first rotating member comprises second teeth operatively coupled with the first teeth such that a rotation of the first rotating member in a clockwise direction facilitate linear motion of the overload shaft in a first direction. A rotation of the first rotating member in an anti-clockwise direction facilitate linear motion of the overload shaft in a second direction opposite to the first direction for controlling a first rating parameter of the one or more rating parameters.
[0013] In an aspect, the first rating parameter may comprise an overload rating of the release.
[0014] In an aspect, the one or more driving protrusions may be operatively configured with a thermal screw mounted on a bimetal strip for detecting rise in temperature in case of an overload condition in the release such in that the overload condition a temperature in the release rises facilitating deflection of the bimetal strip for pushing the one or more driving protrusions for tripping the release.
[0015] In an aspect, the linear motion of the overload shaft may facilitate in the first direction reduces a distance between the thermal screw and the one or more driving protrusions such that a small deflection of the bimetal strip in case of a small overload condition may facilitate pushing of the one or more driving protrusion for tripping the release.
[0016] In an aspect, the linear motion of the overload shaft may facilitate in the second direction increases the distance between the thermal screw and the one or more driving protrusions such that a large deflection of the bimetal strip in case of a large overload condition may facilitate pushing of the one or more driving protrusion for tripping the release.
[0017] The arrangement as claimed in claim 3, wherein the bimetal strip is mounted on a heater configured to sense the rise in temperature in the release.
[0018] In an aspect, the arrangement may comprise a first magnet configured with the heater, a second magnet pivotally coupled with the first magnet such that there is a pre-defined air gap between a free end of the second magnet and the first magnet. The second magnet may be configured to rotate along a pivotal axis of the second magnet. A sliding member may be elastically configured with the second magnet through the elastic member. The air gap between the free end of the second magnet is maintained by a resistive force of the elastic member against an attraction force between the first magnet and the second magnet. A second rotating member may be operatively configured with the sliding member such a clockwise rotation of the second rotating member may lead to a linear motion of the sliding member in a first direction facilitating an increase in the resistive force of the elastic member. An anti-clockwise rotation of the second rotating member may lead to a linear motion of the sliding member in a second direction facilitating a decrease in the resistive force of the elastic member, for controlling a second rating parameter of the one or more parameters.
[0019] In an aspect, the second rating parameter may comprise an overcurrent condition in the release.
[0020] In an aspect, the linear movement of the sliding member in the first direction may facilitate detection of high overcurrent condition in the release, and the linear movement of the sliding member in the second direction may facilitate detection of low overcurrent condition in the release.
[0021] In an aspect, when the free end of second magnet may be attracted to the first magnet the release is tripped.
[0022] 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
[0023] 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.
[0024] 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 is applicable to any one of the similar components having the same first reference label irrespective of the second reference label.
[0025] FIG. 1 illustrates an exemplary representation of a front view of an arrangement for controlling raring parameter of a release, in accordance with an embodiment of the present disclosure.
[0026] FIG. 2 illustrates an exemplary representation of the overload shaft, in accordance with an embodiment of the present disclosure.
[0027] FIG. 3 illustrates an exemplary representation of the second magnet, in accordance with an embodiment of the present disclosure.
[0028] FIG. 4 illustrates an exemplary representation of the latch, in accordance with an embodiment of the present disclosure.
[0029] FIG. 5 illustrates an exemplary representation of the tripper, in accordance with an embodiment of the present disclosure.

DETAILED DESCRIPTION
[0030] 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.
[0031] 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.
[0032] The present disclosure relates to thermal and magnetic release. More particularly the present disclosure relates an arrangement for controlling one or more parameters of thermal and magnetic release.
[0033] The present disclosure elaborates upon an arrangement for controlling one or more rating parameters of a release configured with a switchgear. The arrangement includes an overload shaft operatively configured with a magnetic shaft of the thermal magnetic release, and the overload shaft comprises. An engaging protrusion, having first teeth, and one or more driving protrusions extending from the overload shaft, wherein each of the driving protrusions comprises a first end and a second end longer than the first end such that the first end and the second ends are coupled together with a sloped surface. A first rotating member operatively configured with the overload shaft. The first rotating member comprises second teeth operatively coupled with the first teeth such that a rotation of the first rotating member in a clockwise direction facilitate linear motion of the overload shaft in a first direction. A rotation of the first rotating member in an anti-clockwise direction facilitate linear motion of the overload shaft in a second direction opposite to the first direction for controlling a first rating parameter of the one or more rating parameters.
[0034] In an embodiment, the first rating parameter can comprise an overload rating of the release.
[0035] In an embodiment, the one or more driving protrusions can be operatively configured with a thermal screw mounted on a bimetal strip for detecting rise in temperature in case of an overload condition in the release such in that the overload condition a temperature in the release rises facilitating deflection of the bimetal strip for pushing the one or more driving protrusions for tripping the release.
[0036] In an embodiment, the linear motion of the overload shaft can facilitate in the first direction reduces a distance between the thermal screw and the one or more driving protrusions such that a small deflection of the bimetal strip in case of a small overload condition can facilitate pushing of the one or more driving protrusion for tripping the release.
[0037] In an embodiment, the linear motion of the overload shaft can facilitate in the second direction increases the distance between the thermal screw and the one or more driving protrusions such that a large deflection of the bimetal strip in case of a large overload condition can facilitate pushing of the one or more driving protrusion for tripping the release.
[0038] The arrangement as claimed in claim 3, wherein the bimetal strip is mounted on a heater configured to sense the rise in temperature in the release.
[0039] In an embodiment, the arrangement can comprise a first magnet configured with the heater, a second magnet pivotally coupled with the first magnet such that there is a pre-defined air gap between a free end of the second magnet and the first magnet. The second magnet can be configured to rotate along a pivotal axis of the second magnet. A sliding member can be elastically configured with the second magnet through the elastic member. The air gap between the free end of the second magnet is maintained by a resistive force of the elastic member against an attraction force between the first magnet and the second magnet. A second rotating member can be operatively configured with the sliding member such a clockwise rotation of the second rotating member can lead to a linear motion of the sliding member in a first direction facilitating an increase in the resistive force of the elastic member. An anti-clockwise rotation of the second rotating member can lead to a linear motion of the sliding member in a second direction facilitating a decrease in the resistive force of the elastic member, for controlling a second rating parameter of the one or more parameters.
[0040] In an embodiment, the second rating parameter can comprise an overcurrent condition in the release.
[0041] In an embodiment, the linear movement of the sliding member in the first direction can facilitate detection of high overcurrent condition in the release, and the linear movement of the sliding member in the second direction can facilitate detection of low overcurrent condition in the release.
[0042] In an embodiment, when the free end of second magnet can be attracted to the first magnet the release is tripped.
[0043] FIG. 1 illustrates an exemplary representation of a front view of an arrangement for controlling raring parameter of a release, in accordance with an embodiment of the present disclosure.
[0044] FIG. 2 illustrates an exemplary representation of the overload shaft, in accordance with an embodiment of the present disclosure.
[0045] FIG. 3 illustrates an exemplary representation of the second magnet, in accordance with an embodiment of the present disclosure.
[0046] FIG. 4 illustrates an exemplary representation of the latch, in accordance with an embodiment of the present disclosure.
[0047] FIG. 5 illustrates an exemplary representation of the tripper, in accordance with an embodiment of the present disclosure.
[0048] As illustrated, an arrangement 100 for controlling one or more rating parameters of a release (can be a thermal magnetic release), adapted to be configured with a switchgear, can includes an overload shaft 102 that can be operatively configured with a magnetic shaft 106 of the thermal magnetic release. The one or more rating parameters can include an overload condition and overcurrent condition. A first rotating member 104 can be operatively configured with the overload shaft 102. The overload shaft 102 can include an engaging protrusion 102-1, having first teeth 102-T, and one or more driving protrusions 102-2 that can be extending from the overload shaft 102. Each of the driving protrusions of the one or more driving protrusions 102-2 can include a first end 102-2A and a second end 102-2B longer than the first end 102-2A. The first end 102-2A and the second ends 102-2B can be coupled together with a sloped surface 102-2S.
[0049] In an embodiment, the first rotating member 104 can include second teeth 1-104-T that can be operatively coupled with the first teeth 102-T such that a rotation of the first rotating member 104 in a clockwise direction can facilitate linear motion of the overload shaft 104 in a first direction, and a rotation of the first rotating member 104 in an anti-clockwise direction can facilitate linear motion of the overload shaft 102 in a second direction, opposite to the first direction, for controlling a first rating parameter (overload condition/rating) of the one or more rating parameters.
[0050] In an embodiment, the one or more driving protrusions 102-2 can be operatively configured with a thermal screw 108 that can be mounted on a bimetal strip 110 mounted on a heater 112 for detecting a rise in temperature, in case of an overload condition, in the release such in that the overload condition a temperature in the release rises facilitating deflection of the bimetal strip 110 for pushing the one or more driving protrusions 102-2 for tripping the release. In an embodiment, the linear motion of the overload shaft 104 in the first direction can reduce a distance between the thermal screw 110 and the one or more driving protrusions 102-2 such that a small deflection of the bimetal strip 110 in case of a small overload condition can facilitate pushing of the one or more driving protrusion 102-2 for tripping the release.
[0051] In an embodiment, the linear motion of the overload shaft 104 in the second direction can increase the distance between the thermal screw 108 and the one or more driving protrusions 102-2 such that a large deflection of the bimetal strip 110 in case of a large overload condition can facilitate pushing of the one or more driving protrusion 102-2 for tripping the release. In this way, the proposed arrangement can detect the overload condition within a range and can trip, using a tripping assembly, in response to protect other electric devices. The tripping assembly can include a latch 124, a tripper 126. The tripper can be elastically configured with the latch through an elastic member 128 in a charged state. When the overload is detected the tripped 128 can be released from the latch 124 to trip the release.
[0052] In an embodiment, the arrangement 100 can include a first magnet 114 that can be configured with the heater 112 and a second magnet 116 can be pivotally coupled with the first magnet 114 such that there is a pre-defined air gap between a free end 116-1 of the second magnet and the first magnet 114. The second magnet 116 can be configured to rotate along a pivotal axis. A sliding member 118 can be elastically configured with the second magnet 116 through the elastic member 120 such as but not limited to a spring. The air gap between the free end 116-1 and the first magnet 114 can be maintained by a resistive force of the elastic member 120 against an attraction force between the first magnet 114 and the second magnet 116.
[0053] In an embodiment, a second rotating member 122 can be operatively configured with the sliding member 118 such that a clockwise rotation of the second rotating member 122 can lead to a linear motion of the sliding member 118 in a first direction facilitating an increase in the resistive force of the elastic member 118. An anti-clockwise rotation of the second rotating member 122 can lead to a linear motion of the sliding member 118 in a second direction facilitating a decrease in the resistive force of the elastic member 120, for controlling a second rating parameter of the one or more parameters. The second rating parameter can be the overcurrent condition/rating. The proposed invention provides an arrangement for controlling one or more rating parameters of a release, which allows pole wise calibration. Magnetic calibration screw can be provided in each pole, and the magnetic calibration screw can be adjusted based on the performance of a particular pole. The calibration test can be done for single pole and the respective magnetic calibration screw is adjusted to trip within limits.
[0054] In an embodiment, the linear movement of the sliding member 118 in the first direction can facilitate detection of high overcurrent condition in the release, and the linear movement of the sliding member 118 in the second direction can facilitate detection of low overcurrent condition in the release. In an embodiment, when the free end 116-1 of second magnet can be attracted to the first magnet 114 the release can be tripped. In this way, the proposed arrangement can detect the overcurrent condition within a range and can trip in response to protect other electric devices. In both the overload and overcurrent conditions, the proposed arrangement can trip the release through a tripping arm that can trip, using the tripping assembly, in response to protect other electric devices. When the overcurrent is detected the tripped 128 can be released from the latch 124 to trip the release.
[0055] 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, 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.
[0056] 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
[0057] The proposed invention provides an arrangement for controlling one or more rating parameters of a release, which allow same release to work on different overcurrent and overload condition/rating.
[0058] The proposed invention provides an arrangement for controlling one or more rating parameters of a release, which is effective and easy to use as the rating parameters of the release can be varied by rotating knobs.
[0059] The proposed invention provides an arrangement for controlling one or more rating parameters of a release, which is cost-effective as no complex electronic circuitry has been used.
[0060] The proposed invention provides an arrangement for controlling one or more rating parameters of a release, which requires less maintenance as no complex electronic circuitry has been used.
[0061] The proposed invention provides an arrangement for controlling one or more rating parameters of a release, which allows pole wise calibration
, Claims:1. An arrangement (100) for controlling one or more rating parameters of a release configured with a switchgear, the arrangement (100) comprising:
an overload shaft (102) operatively configured with a magnetic shaft (106) of the thermal magnetic release, and the overload shaft (102) comprises:
an engaging protrusion (102-1), having first teeth (102-T), and
one or more driving protrusions (102-2) extending from the overload shaft (102), wherein each of the driving protrusions comprises a first end (102-2A) and a second end (102-2B), longer than the first end (102-2A), such that the first end (102-2A) and the second ends (102-2B) are coupled together with a sloped surface (102-2S); and
a first rotating member (104) operatively configured with the overload shaft (102), wherein the first rotating member (104) comprises second teeth (104-T) operatively coupled with the first teeth (102-T) such that a rotation of the first rotating member (104) in a clockwise direction facilitate linear motion of the overload shaft (102) in a first direction, and a rotation of the first rotating member (104) in an anti-clockwise direction facilitate linear motion of the overload shaft (102) in a second direction opposite to the first direction for controlling a first rating parameter of the one or more rating parameters.
2. The arrangement as claimed in claim 1, wherein the first rating parameter comprises an overload rating of the release.
3. The arrangement as claimed in claim 1, wherein the one or more driving protrusions (102-2) are operatively configured with a thermal screw (108) mounted on a bimetal strip (110) for detecting rise in temperature in case of an overload condition in the release such in that the overload condition a temperature in the release rises facilitating deflection of the bimetal strip (110) for pushing the one or more driving protrusions (102-2) for tripping the release.
4. The arrangement as claimed in claim 3, wherein the linear motion of the overload shaft (102) facilitates in the first direction reduces a distance between the thermal screw (108) and the one or more driving protrusions (102) such that a small deflection of the bimetal strip (110) in case of a small overload condition facilitate pushing of the one or more driving protrusion (102-2) for tripping the release.
5. The arrangement as claimed in claim 3, wherein the linear motion of the overload shaft (102) facilitates in the second direction increases the distance between the thermal screw (108) and the one or more driving protrusions (102-2) such that a large deflection of the bimetal strip (110) in case of a large overload condition facilitate pushing of the one or more driving protrusion (102-2) for tripping the release.
6. The arrangement as claimed in claim 3, wherein the bimetal strip (110) is mounted on a heater (112) configured to sense the rise in temperature in the release.
7. The arrangement as claimed in claim 6, wherein the arrangement (100) comprises:
a first magnet (114) configured with the heater (112);
a second magnet (116) pivotally coupled with the first magnet (114) such that there is a pre-defined air gap between a free end (116-1) of the second magnet (116) and the first magnet (114), and the second magnet (116) is configured to rotate along a pivotal axis; and
a sliding member (118) elastically configured with the second magnet (116) through an elastic member (120), wherein the air gap between the free end (116-1) and the first magnet (114) is maintained by a resistive force of the elastic member (120) against an attraction force between the first magnet (114) and the second magnet (116), and
a second rotating member (122) operatively configured with the sliding member (118) such a clockwise rotation of the second rotating member (122) leads to a linear motion of the sliding member (118) in a first direction facilitating an increase in the resistive force of the elastic member (120), and an anti-clockwise rotation of the second rotating member (122) leads to a linear motion of the sliding member (118) in a second direction facilitating a decrease in the resistive force of the elastic member (120), for controlling a second rating parameter of the one or more parameters.
8. The arrangement as claimed in claim 7, wherein the second rating parameter comprises an overcurrent condition in the release.
9. The arrangement as claimed in claim 7, wherein the linear movement of the sliding member (118) in the first direction facilitates detection of high overcurrent condition in the release, and the linear movement of the sliding member (118) in the second direction facilitates detection of low overcurrent condition in the release.
10. The arrangement as claimed in claim 7, wherein when the free end (116-1) of second magnet (116) is attracted towards the first magnet (114) the release is tripped.