Description: TECHNICAL FIELD
[0001] The present disclosure relates to the field of gas-insulated switchgear. More particularly the present disclosure relates to an interlock arrangement to be configured with a disconnector of the switchgear.

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] A GIS board receives power from upstream panels via cables. If the cables are defective and need to be corrected, the system must be isolated and earthed. To prevent line-to-earth problems, it should not be possible for someone to reconnect the supply to the system by mistake if such work has been initiated. It may be reconnected only with authorization from the appropriate authorities or under certain system circumstances. The disconnector is supposed to be grounded only when the cable is dead. However, there is sometimes a possibility of accidental or un-intentional earthing of the disconnector, which is undesirable
[0004] There is, therefore, a need for an interlock mechanism that is capable of avoiding any accidental earthing of the disconnector.

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 object of the present disclosure to provide an interlock arrangement to be configured with a disconnector mechanism of switchgear, which restricts any possibility of accidental earthing of the disconnector.
[0007] It is an object of the present disclosure to provide an interlock arrangement to be configured with a disconnector mechanism of switchgear, which is easy to implement.
[0008] It is an object of the present disclosure to provide an interlock arrangement to be configured with a disconnector mechanism of switchgear, which is cost-effective.
[0009] It is an object of the present disclosure to provide an interlock arrangement to be configured with a disconnector mechanism of switchgear, which has less maintenance cost.
[0010] It is an object of the present disclosure to provide an interlock arrangement to be configured with a disconnector mechanism of switchgear, which improves the durability and life of the switchgear by avoiding accidental earthing of the disconnector.
[0011] It is an object of the present disclosure to provide an interlock arrangement to be able to operate electro-mechanically without any use of a key lock system or personal permission when all of the required conditions are met.

SUMMARY
[0012] The present disclosure relates to the field of gas-insulated switchgear. More particularly the present disclosure relates to an interlock arrangement to be configured with a disconnector of the switchgear.
[0013] An aspect of the present disclosure pertains to an interlock arrangement to be configured with a disconnector mechanism of switchgear. The interlock arrangement includes a horizontal member, having a first end and a second end, orthogonally configured with a circular member of the disconnector mechanism. The horizontal member is configured to move, along a longitudinal direction of the horizontal member, between a first position and a second. Moving the horizontal member at the second position, in a first direction, facilitates sliding the first end into a slot of the rotational plate such that the rotational plate is allowed, till a length of the slot, between electrical ON condition and electrical OFF condition only. Moving the horizontal member at the first position, in the second direction, facilitates sliding the first end out of the slot of the rotational plate such that the rotational plate is allowed to rotate, beyond the length of the slot, at an earthing position. An electromagnetic coil has a movable member operatively configured with the horizontal member. The movable member is configured to move between a third position and a fourth position relative to the horizontal member. The movable member at the fourth position restricts the movement of the horizontal member in the second direction to slide out the first end from the slot.
[0014] In an aspect, the electromagnetic coil may be electrically configured to sense an input supply, through a voltage detection unit electrically coupled with the input supply of the switchgear. Voltage detection unit is electrically placed between medium voltage switchgear equipment and voltage indicating system.
[0015] In an aspect, the electromagnetic coil may be electrically configured with an auxiliary supply and configured to receive input supply, from the auxiliary supply, when the input supply of the switchgear is absent. Input supply voltage is detected from the voltage detection unit point of the cable bushing. Voltage detection unit is for detecting voltage with a built-in capacitive voltage divider and it is used to sense the presence or absence of active voltage. which interfaces two circuits that use different operating voltages. The voltage divider can help bring down voltage level to avoid damage to the voltage indicating system which makes it safe to handle.
[0016] In an aspect, on receiving the input supply, from the auxiliary supply, the movable member may be configured to be moved to the fourth position.
[0017] In an aspect, the movable member may be configured to remain at the third position when the input supply to the switchgear is present.
[0018] Various objects, features, aspects, and advantages of the inventive subject matter will become more apparent from the following detailed description of preferred embodiments, along with the accompanying drawing figures in which like numerals represent like components.

BRIEF DESCRIPTION OF DRAWINGS
[0019] 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.
[0020] 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.
[0021] FIG. 1A-1B illustrates an exemplary representation of a disconnector mechanism integrated with interlock arrangement, in accordance with an embodiment of the present disclosure.
[0022] FIG. 2 illustrates an exemplary representation of the position of the first end in the slot of the rotational plate at different electrical conditions, in accordance with an embodiment of the present disclosure.
[0023] FIG. 3A illustrates an exemplary representation of the position of the movable member when the input supply to the switchgear is present and FIG. 3B illustrates an exemplary representation of the position of the movable member when the input supply to the switchgear is absent, in accordance with an embodiment of the present disclosure.

DETAILED DESCRIPTION
[0024] 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.
[0025] 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.
[0026] The present disclosure relates to the field of gas-insulated switchgear. More particularly the present disclosure relates to an interlock arrangement to be configured with a disconnector of the switchgear.
[0027] The present disclosure elaborates upon an interlock arrangement to be configured with disconnector mechanism of switchgear. The interlock arrangement includes a horizontal member, having a first end and a second end, orthogonally configured with a circular member of the disconnector mechanism. The horizontal member is configured to move, along a longitudinal direction of the horizontal member, between a first position and a second. Moving the horizontal member at the second position, in a first direction, facilitates sliding the first end into a slot of the rotational plate such that the rotational plate is allowed, till a length of the slot, between electrical ON condition and electrical OFF condition only. Moving the horizontal member at the first position, in the second direction, facilitates sliding the first end out of the slot of the rotational plate such that the rotational plate is allowed to rotate, beyond the length of the slot, at an earthing position. An electromagnetic coil has a movable member operatively configured with the horizontal member. The movable member is configured to move between a third position and a fourth position relative to the horizontal member. The movable member at the fourth position restricts the movement of the horizontal member in the second direction to slide out the first end from the slot.
[0028] In an embodiment, the electromagnetic coil can be electrically configured to sense an input supply, through a voltage detector unit electrically coupled with the input supply, of the switchgear.
[0029] In an embodiment, the electromagnetic coil can be electrically configured with an auxiliary supply, and configured to receive input supply, from the auxiliary supply, when the input supply of the switchgear is absent.
[0030] In an embodiment, on receiving the input supply, from the auxiliary supply, the movable member can be configured to be moved to the fourth position.
[0031] In an embodiment, the movable member can be configured to remain at the third position when the input supply to the switchgear is present.
[0032] FIG. 1A-1B illustrates an exemplary representation of a disconnector mechanism integrated with interlock arrangement, in accordance with an embodiment of the present disclosure.
[0033] FIG. 2 illustrates an exemplary representation of the position of the first end in the slot of the rotational plate at different electrical conditions, in accordance with an embodiment of the present disclosure.
[0034] FIG. 3A illustrates an exemplary representation of the position of the movable member when the input supply to the switchgear is present and FIG. 3B illustrates an exemplary representation of the position of the movable member when the input supply to the switchgear is absent, in accordance with an embodiment of the present disclosure.
[0035] As illustrated, an interlock arrangement to be configured with disconnector mechanism 200 of switchgear. The switchgear can include but is not limited to gas-insulate switchgear. The interlock arrangement can include a horizontal member 102 having a first end 102-2 and a second end 102-1. The horizontal member 102 can be orthogonally configured with a circular member 202 of the disconnector mechanism 200. The horizontal member 102 can be configured to move, along a longitudinal direction of the horizontal member 102, between a first position and a second. Moving the horizontal member 102 at the second position, in a first direction, can facilitate sliding the first end 102-2 into a slot 202-1 of the rotational plate 202 such that the rotational plate 202 is allowed till a length of the slot only.
[0036] In an embodiment, rotating the rotational plate 202, within the length of the slot, can facilitate switching the disconnector between electrical ON condition and electrical OFF condition only. Moving the horizontal member 102 at the first position, in the second direction, can facilitate sliding the first end 102-2 out of the slot 202-1 of the rotational plate 202 such that the rotational plate 202 is allowed to rotate, beyond the length of slot 202-1. This can facilitate rotating the rotational plate 202 till an earthing position of the disconnector 200. An electromagnetic coil 104 having a movable member 104-1 can be operatively configured with the horizontal member 102. The movable member 104-1 can be configured to move between a third position and a fourth position relative to the horizontal member.
[0037] In an embodiment, moving the movable member 104-1 at the fourth position can restrict the movement of the horizontal member 102, in the second direction, to slide out the first end 102-2 from the slot 202-1. The electromagnetic coil 104 can be electrically configured to sense an input supply, through a voltage detection unit 106 electrically coupled with the input supply, of the switchgear. The voltage detection unit 106 can include a built-in capacitive voltage divider and a voltage indicator unit that can detect the presence or absence of active voltage (switchgear input supply in this case). The electromagnetic coil 104 can be electrically configured with an auxiliary supply, and can be configured to receive input supply, from the auxiliary supply, when the input supply of the switchgear is absent. On receiving the input supply, from the auxiliary supply, the movable member 104-1 can be configured to be moved to the fourth position. The movable member 104-1 can be configured to remain at the third position when the input supply to the switchgear is present.
[0038] The proposed interlock mechanism restricts any possibility of earthing the disconnector mechanism from switching to the earthing position when the input supply to the switchgear is present since the first end 102-2 of the horizontal member 102 is engaged into the slot 202-1 of the rotational plate 202. This prohibits any accidental or unintentional earthing of the switchgear. The rotational plate 202 is allowed to rotate to the earthing position only when the first end is slid out of the slot 202-1. Sliding out the first end 102-2 from the slot 202-1 is restricted by the movable member 104-1. When the input supply to the switchgear is absent, then the electromagnetic coil 104 is configured to receive input from the auxiliary supply, and the movable member is moved to the third position thereby, allowing the sliding out of the first end 102- from the slot 202.
[0039] In an embodiment, for earthing a connecting cable, is coupled between the first gas-insulated switchgear and the second gas-insulated switchgear. wherein moving the horizontal member 102 at the second position, in the second direction, facilitates sliding the first end out of the slot 202-1 of the rotational plate 202 such that the rotational plate is allowed to rotate, beyond the length of the slot, at an earthing position; and if the cable is dead then an electromagnetic coil having a movable member is in the fourth position 104-1 due to absent of supply. The user now safely puts Disconnecting switch into the earth position.
[0040] 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.
[0041] 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
[0042] The proposed invention provides an interlock arrangement to be configured with a disconnector mechanism of switchgear, which restricts any possibility of accidental earthing of the disconnector.
[0043] The proposed invention provides an interlock arrangement to be configured with a disconnector mechanism of switchgear, which is easy to implement.
[0044] The proposed invention provides an interlock arrangement to be configured with a disconnector mechanism of switchgear, which is cost-effective.
[0045] The proposed invention provides an interlock arrangement to be configured with a disconnector mechanism of switchgear, which has less maintenance cost.
[0046] The proposed invention provides an interlock arrangement to be configured with a disconnector mechanism of switchgear, which improves the durability and life of the switchgear by avoiding accidental earthing of the disconnector
[0047] The proposed invention provides an interlock arrangement to be able to operate electro-mechanically without any use of a key lock system or personal permission when all of the required conditions are met.

, Claims: 1. An interlock arrangement to be configured with disconnector mechanism of switchgear, the interlock arrangement comprising:
a horizontal member, having a first end and a second end, orthogonally configured with a circular member of the disconnector mechanism, and the horizontal member is configured to move, along a longitudinal direction of the horizontal member, between a first position and a second,
wherein moving the horizontal member at the second position, in a first direction, facilitates sliding the first end into a slot of the rotational plate such that the rotational plate is allowed, till a length of the slot, between electrical ON condition and electrical OFF condition only, and
wherein moving the horizontal member at the first position, in the second direction, facilitates sliding the first end out of the slot of the rotational plate such that the rotational plate is allowed to rotate, beyond the length of the slot, at an earthing position; and
an electromagnetic coil having a movable member operatively configured with the horizontal member, wherein the movable member is configured to move between a third position and a fourth position relative to the horizontal member depending on the switchgear incoming supply condition, wherein the movable member at the fourth position restricts the movement of the horizontal member in the second direction to slide out the first end from the slot.
2. The interlock arrangement as claimed in claim 1, wherein the electromagnetic coil is electrically configured to sense an input supply, through a voltage detector unit electrically coupled with the input supply, of the switchgear.

3. The interlock arrangement as claimed in claim 1, wherein the electromagnetic coil is electrically configured with an auxiliary supply, and configured to receive input supply, from the auxiliary supply, when the input supply of the switchgear is absent.
4. The interlock arrangement as claimed in claim 4, wherein on receiving the input supply, from the auxiliary supply, the movable member is configured to be moved to the fourth position.
5. The interlock arrangement as claimed in claim 4, wherein the movable member is configured to be remained at to the third position when the input supply to the switchgear is present.