CLIAMS:1. An interface arrangement for ingress protection in circuit breaker, said arrangement comprising:
an ingress protection assembly comprises a first cover having at least one projection and a second cover having at least one slot;
a front cover having at least one projection for sliding said ingress protection assembly;
wherein movement of said ingress protection assembly along angular movement of a knob of said circuit breaker covering the opening space created during switching of said circuit breaker, thereby providing ingress protection to said circuit breaker.
2. The arrangement as claimed in claim 1, wherein said first cover attached on top of said second cover by aligning the projection(s) to slot(s) in said ingress protection assembly, therefore connecting said assembly with said front cover for sliding within said front cover, therefore connecting to said knob.
3. The arrangement as claimed in claim 2, wherein at least one rib on said first cover facilitate interaction of said second cover with said first cover and said knob during switching , thereby overlapping of said knob and said ingress assembly for providing ingress protection to said circuit breaker.
4. The arrangement as claimed in claim 1, wherein said first cover is attached with said knob and said second cover is attached with said front cover.
5. The arrangement as claimed in claim 4, wherein said second cover slides within said front cover and said first cover move along with angular movement of said knob.
6. The arrangement as claimed in claim 5, wherein said rib(s) on said first cover facilitate interaction of said second cover with said first cover and said knob during switching, thereby overlapping of said knob and said ingress assembly for providing ingress protection to said circuit breaker.
7. connecting said ingress thereby said assembly slides at least one rib on said first cover facilitate interaction of said second cover with said first cover and said knob.
8. The arrangement as claimed in claim 1, wherein projection on said front cover acts as a stopper for said assembly within said front cover.
,TagSPECI:TECHNICAL FIELD OF THE INVENTION
The present invention relates generally to arranging an interface to provide protection against the intrusion, accidental contact, etc. at different operating positions of circuit breaker. More particularly, the present invention provides double interface arrangement in circuit breaker for ingress protection.
BACKGROUND AND THE PRIOR ART
A typical circuit breaker provides ingress protection (IP)by various means. Many a times,interface/cover is used to provide IP at different operating positions of circuit breaker. In general, the interface is arranged on top of knob &moves with the knob of the circuit breaker and avoids creating exposure to mechanical/electrical components within the breaker.
Knob in conjunction with the interface shouldn’t leave any opening space during switching between positions of breaker. Knob & interface in union envelopes the entire opening area and provide IP. Many manufacturers use single interface to provide IP. Angular travel of knob plays a critical role in the design of interface. To design an interface for higher angular travel of knob, interface tends to occupy a large space and calls for increase in the size of breaker.
Manufacturers offer variety of internal accessories along with circuit breaker as per customer requirement. For the fitment of these internal accessories, breakers need to be opened and accessories are fitted in the corresponding cavity & reassembled. Most of the cases interface is not locked with the other elements of breaker & easily gets misplaced or drops off the breaker during re-assembly at customer area.
EP2144342 disclosed a drawout system with an interface proving a lower ingress protection rating is provided. The system includes a flange mounted to a door. A sleeve is movably mounted to the door adjacent to the flange. As the circuit breaker is moved from a racked-in position to a test position to a racked-out position, the sleeve moves with the circuit breaker and avoids creating exposure to electrical components within the drawout. The drawout system allows the operator to operate the circuit breaker with the door open or closed.
While existing arrangements are suitable for the intended purpose of achieving IP, there still remains a need for improvements particularly regarding the space utilized & wrong assembly of interface by the customer.
Amount of space required for an interface is large for breakers with higher angular travel between operating positions. To provide IP in these situations, interface tends to use larger space & hence increase the size of breaker.
Manufacturers allow the customer to open the circuit breaker during internal accessories fitment &many of the existing arrangements doesn’t take care of ensuring intended arrangement of interface during re-assembly. Wrong assembly of interface leads to the failure to provide the intended ingress protection claimed by the manufacturer. Operating the breaker with wrong assembly may lead to damaging the interface & other components of the breaker
Therefore, the preset invention overcome the disadvantages of the prior art and provides an interface arrangement in compact space available & provide ease to the user during re-assembly.

OBJECTS OF THE INVENTION
A basic object of the present invention is to overcome the disadvantages/drawbacks of the known art.
Another object of the present invention is to provide an interface arrangement which utilize less space to provide IP even with higher angular travel of knob
Another object of the present invention is to provide an interface arrangement for ingress protection in circuit breaker
These and other advantages of the present invention will become readily apparent from the following detailed description read in conjunction with the accompanying drawings.

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

In an aspect of the present invention, there is provided an interface arrangement for ingress protection in circuit breaker, said arrangement comprising:
an ingress protection assembly comprises a first cover having at least one projection and a second cover having at least one slot;
a front cover having at least one projection for sliding said ingress protection assembly;
wherein movement of said ingress protection assembly along angular movement of a knob of said circuit breaker covering the opening space created during switching of said circuit breaker, thereby providing ingress protection to said circuit breaker.
Other aspects, advantages, and salient features of the invention will become apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the annexed drawings, discloses exemplary embodiments of the invention.

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
The following drawings are illustrative of particular examples for enabling methods of the present invention, are descriptive of some of the methods, and are not intended to limit the scope of the invention. The drawings are not to scale (unless so stated) and are intended for use in conjunction with the explanations in the following detailed description.
Figure 1 illustrates the front view (a) and back view (b) of the protective interface 1 (IP1).
Figure 2 illustrates the front view (a) and back view (b) of the protective interface 2 (IP2).
Figure 3 illustrates the IP cover assembly along with slot for knob and IP cover assembly along with interactive projections of IP1 with IP2
Figure 4 illustrates the Front cover assembly
Figure 5 illustrates the Sectional view of Front cover assembly
Figure 6 illustrates the assembly process of IP assembly with Front cover
Figure 7 illustrates the Front cover assembly in ON Position
Figure 8 illustrates the cross sectional view in ON Position. Knob, IP1 & IP2 attain positions where, there exists overlap between them to provide ingress protection
Figure 9 illustrates the Front cover assembly in TRIP Position
Figure 10 illustrates the cross sectional view in TRIP Position. Knob, IP1 & IP2 attain positions where, there exists overlap between them to provide ingress protection.
Figure 11 illustrates the Front cover assembly in OFF/RESET Position
Figure 12 illustrates the cross sectional view in OFF/RESET Position. Knob, IP1 & IP2 attain positions where, there exists overlap between them to provide ingress protection.
Figure 13 illustrates the protective interface 1 (IP1).
Figure 14 illustrates the knob. Slots into which projections of IP1 gets attached is shown.
Figure 15 illustrates the protective interface 2 (IP2) and Slots provided on IP2 .
Figure 16 illustrates the Front cover and Projections of different dimensions.
Figure 17 illustrates the assembly process of IP2 with Front Cover.
Figure 18 illustrates the assembly process of IP2 with Front cover. Once slots on one side are aligned, slide IP2 into front cover till the slots on other side matches with projections in Front Cover.
Figure 19 illustrates the cross sectional view in ON Position. Knob, IP1 & IP2 attain positions where, there exists overlap between them to provide ingress protection.
Figure 20 illustrates the cross sectional view in TRIP Position. Knob, IP1 & IP2 attain positions where, there exists overlap between them to provide ingress protection.
Figure 21 illustrates the cross sectional view in OFF Position. Knob, IP1 & IP2 attain positions where, there exists overlap between them to provide ingress protection.
Figure 22 illustrates the cross sectional view of an intermediate position between OFF-ON. Interaction of ribs of IP1 & IP2 is shown during switching.
Persons skilled in the art will appreciate that elements in the figures are illustrated for simplicity and clarity and may have not been drawn to scale. For example, the dimensions of some of the elements in the figure may be exaggerated relative to other elements to help to improve understanding of various exemplary embodiments of the present disclosure.
Throughout the drawings, it should be noted that like reference numbers are used to depict the same or similar elements, features, and structures.

DETAILED DESCRIPTION OF THE INVENTION
The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of exemplary embodiments of the invention as defined by the claims and their equivalents. It includes various specific details to assist in that understanding but these are to be regarded as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.
The terms and words used in the following description and claims are not limited to the bibliographical meanings, but, are merely used by the inventor to enable a clear and consistent understanding of the invention. Accordingly, it should be apparent to those skilled in the art that the following description of exemplary embodiments of the present invention are provided for illustration purpose only and not for the purpose of limiting the invention as defined by the appended claims and their equivalents.
It is to be understood that the singular forms “a,” “an,” and “the” include plural referents unless the context clearly dictates otherwise.
By the term “substantially” it is meant that the recited characteristic, parameter, or value need not be achieved exactly, but that deviations or variations, including for example, tolerances, measurement error, measurement accuracy limitations and other factors known to those of skill in the art, may occur in amounts that do not preclude the effect the characteristic was intended to provide.
Accordingly, present invention provides double interface arrangements which utilize less space to provide IP even with higher angular travel of knob. Two interfaces along with the knob cover the entire area of opening space created during switching of breaker and provide IP.
Present invention provides a lock arrangement between interfaces and front element of the breaker. Interfaces are arranged in such a way it travels with the knob and are always attached with front element of the breaker. Features provided on the interfaces and front element allows a distinct way assembly them and ensures free movement of interfaces with knob. During the breaker operation & during re-assembly at the customer area, interfaces are always attached with front element. This arrangement prevents wrong assembly & misplacing of interface at the customer area.
Purpose of the invention is to provide IP protection in the least space &to avoid the misplacing/ wrong assembly of interface at the customer area
Two different arrangements are explained to enhance the existing designs.
First arrangement:
In this arrangement, both the interfaces IP1 &IP2 are assembled to Front cover.
Projections are provided in IP1 and Projections of different dimension & ribs that interact with IP2 and take IP2 along with Knob during switching operations shown in Fig 1 & corresponding slots are provided in the IP2 and Projection of IP assembly stopper & knob slot are shown in Fig. 2. IP1 is assembled on top of IP2 by aligning these projections to slots. Because of the dimensional variations in the projections, IP1 can be assembled onto IP2 in a single way shown in fig 3.
Similarly, projections(10) are provided in front cover as shown in Fig 9. IP assembly slides into these projections in the front cover. IP assembly can’t be assembled in opposite direction because of the projections (7) on IP2. The same projections act as a stopper for IP assembly inside the front cover.
Once IP assemblyis assembled into front cover, it can freely slide inside the front cover. This arrangement ensures free movement of IP assembly along with Knob and also locks IP assembly inside the front cover.
During internal accessory fitment at customer site as you don’t open these IP covers separately from Front cover, there is no possibility for missing / wrong assembly of IP covers.
During breaker operation from one position to other, IP assembly travels along with the knob. Ribs provided on the IP1 as shown in Fig 2 interact with the slots provided in IP2 as shown in Fig 3 during switching. Interaction of IP2 with IP1 & Knob is through these ribs. Cutout provided in the interfaces is such a way that there is always an overlap created between interfaces (IP1 & IP2). Fig 7 to Fig 12 shows the overlap created by knob & interfaces to provide IP at different positions of breaker
Second arrangement:
In this arrangement, one of the interfaceIP1 is attached with knob and the second interface IP2 is assembled to Front cover.
Projections are provided in IP1 as shown in Fig13 & corresponding slots are provided in the knob as shown in Fig.14. IP1 is assembled on top of Knob by aligning these projections to slots. Because of the dimensional variations in the projections, IP1 can be assembled onto knob in a single way.
Projections of different dimension & ribs that interact with IP2 and take IP2 along with Knob during switching operations are shown in fig 13
Similarly, projections are provided in front cover as shown in Fig 16. & slots are provided on the IP2 as shown in Fig 15.Slots are positioned in such a way they don’t align with the projections in the front cover & dimensionally projections are different. Because of these variations, IP2 and front cover can be assembled in a single way. To assemble IP2 with front cover, one of the projections of IP2 has to be matched with corresponding slots in front cover and slide IP2 into Front cover till the other projections align to the slots in the front cover as shown in Fig 17 &18. Slots on one side of the IP2 are aligned with projections of Front cover and . Once slots on one side are aligned, slide IP2 into front cover till the slots on other side matches with projections in Front Cover. Once IP2 is assembled into front cover, IP2 can freely slide inside the front cover. Because of misalignment of projections and slots, IP2 can never come out of the Front cover at any operating position of the breaker. This arrangement ensures free movement of IP2 along with IP1 &Knob and also locks IP2 in the front cover.
During breaker operation from one position to other, IP1 travels along with the knob. Ribs provided on the IP1 as shown in Fig 1 interact with the ribs provided in IP2 as shown in Fig 17 during switching. Interaction of IP2 with IP1 & Knob is through these ribs. Cutout provided in the interfaces is such a way that there is always an overlap created between interfaces (IP1 & IP2).Fig 19, 20&21 shows the overlap created by knob& interfaces to provide IP at different positions of breaker.
The one of the novel features of the invention is that, it eliminates the misplacing/ wrong assembly of interface at the customer area.
The other novelty is the double arrangement of interfaces that provide IP occupying less space.