Title of Invention	AN IMPROVED INSULATED SUPPORT DEVICE FOR PREVENTING MOVEMENT OF A CORE ASSEMBLY OF A TRANSMISSION EQUIPMENT
Abstract	This invention relates to an improved insulated support device for preventing movement of a core assembly of a transmission equipment due to random excitation under dynamic transportation and seismic disturbances of the equipment while in operation, the device comprising; a hollow enclosure structure having a higher diameter bulb-shaped shell (2) at an upper part, a small diameter shell (1) at a lower part, and a flattened dished end at top (3); the falt portion (3) having a hole closeable by means of a bolt which is housed in a cover (4), the bolt being flanged on the cover (4); the end of the cover (4) supporting a cantilever end (5) of an internal component (7); an electrode (9) passing through a hollow horizontal cylinder (8) of the internal component (7) and is supported at both end of the upper shell (2); the internal component (7) is further horizontally supported at the middle (11) at both end of the upper shell (2); the lower part (1) of the shell is fixed at the bottom (12); wherein the cantilever end (5) of the internal component (7) is supported by at least three members (S1, S2, S3) from the outer shell (S) which absorb the shock loads, vibration, seismic disturbances during the transportation.

Title of Invention

AN IMPROVED INSULATED SUPPORT DEVICE FOR PREVENTING MOVEMENT OF A CORE ASSEMBLY OF A TRANSMISSION EQUIPMENT

Abstract

This invention relates to an improved insulated support device for preventing movement of a core assembly of a transmission equipment due to random excitation under dynamic transportation and seismic disturbances of the equipment while in operation, the device comprising; a hollow enclosure structure having a higher diameter bulb-shaped shell (2) at an upper part, a small diameter shell (1) at a lower part, and a flattened dished end at top (3); the falt portion (3) having a hole closeable by means of a bolt which is housed in a cover (4), the bolt being flanged on the cover (4); the end of the cover (4) supporting a cantilever end (5) of an internal component (7); an electrode (9) passing through a hollow horizontal cylinder (8) of the internal component (7) and is supported at both end of the upper shell (2); the internal component (7) is further horizontally supported at the middle (11) at both end of the upper shell (2); the lower part (1) of the shell is fixed at the bottom (12); wherein the cantilever end (5) of the internal component (7) is supported by at least three members (S1, S2, S3) from the outer shell (S) which absorb the shock loads, vibration, seismic disturbances during the transportation.

Full Text	FIELD OF THE INVENTION This invention relates to a supporting arrangement of a magnetic core, under the category of UHV unconventional current transformers employed in the 765 kV substations to carry out the tasks of metering and protection functions. BACKGROUND OF THE INVENTION In view of the impulse test voltages prescribed under IEC and critical design specifications imposed by the power utilities, the height of the CT structure goes beyond 9 meters and consequently the secondary cores stand elevated to 8 meters above the ground level. The net weight of six magnetic steel cores is close to 500 kgs and as such, the structure experiences a cantilever type of load in the absence of any support on the stop side. Therefore, it needs to be solidly held in position without any movement during transport as well as in operation. This becomes very important in view of the fact that the core assembly (ground potential) is surrounded by high voltage in all directions. Any slight movement due to any reason could lead to electrical failure of the equipment. The causes for the movement are mainly attributed to eratic loads experienced during transportation and seismic events. Of these two loads, the load during transportation is definitely experienced (the seismic activity may or may not occur) and is of a higher magnitude. Hence qualification of structure for transportation along a rough road (during which the structure would lie in horizontal position) would become an essential requirement. With the arresting component in place, the cantilever response should reduce to acceptable level and in the process the stresses in the component must also be acceptable. OBJECTS OF THE INVENTION It is therefore an object of the invention to provide an improved insulated supporting device which prevents random excitation in transportation of tail transmission equipment. Another object of the invention is to provide an improved insulated supporting device which eliminates seismic disturbances of the tall transmission equipment during its operation. A further object of the invention is to provide an improved insulated supporting device which prevents magnetic core failure of the current transformers during transportation including the operation of the equipment. A still further object of the invention is to provide an improved insulated supporting device which exhibits insulated material property. A still another object of the invention is to provide an improved insulated supporting device which ensures that the tip of the free-standing structure with end mass experiencing cantilever load is restrained. SUMMARY OF THE INVENTION Accordingly, a FRP cylinder of suitable dimensions and mechanical strength is provided to arrest the movement of the core assembly. Based on the height of the structure and weight of the core assembly, a FRP Tube that can stand the mechanical stresses is configured and disposed to prevent random excitation in transportation of tall transmission equipment including eliminating seismic disturbances during operation of the equipment. The design variants (from electrical considerations) being used in the development are of state of the art technology and are completely aimed at getting over the drawbacks that are experienced in the conventional oil filled CT technology. Besides oil, the associated components also undergo a major change in the present development, thus paving way for a completely new technology as demanded by power utilities. BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS Fig. 1 - shows a schematic view of FRC cylindrical cover in vertical position as per present invention Figs. 2 & 3 - shows a schematic view of FRC cylinder cover in horizontal position with protecting supports as per present invention Fig. 4 - shows a schematic view of FRC cylinder cover at top support as per present invention. Figs. 5 & 6 - shows stress & deflection in the cylinder. Fig. 7 - shows stress and deflection of FRP cylinder for supporting the core during transportation DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT OF THE INVENTION As shown in fig - 1, a FRP cylinder with suitable dimension and mechanical strength is provided to arrest the movement of core assembly. FRP cylindrical tube comprises an enclosure made of fiber reinforced plastic which houses the internal components. The enclosure is a shell like structure having smaller diameter at a lower part (1) made of fiber reinforced plastic (FRP) and a higher diameter at an upper end (2) made of steel having a flattened dished end at top (3). The flat portion (3) has a hole which is closed by means of a bolted cover (4). The bolts are housed in a flange which is a part of the cover (4). The end of the cover (4) supports a cantilever end (5) of an internal component (7) by means of a FRP cylinder (6). The internal component (7) is made of a long hollow vertical cylinder with a hollow horizontal cylinder (8) at the top. An electrode (9) passes through this cylinder (8) and is supported in the shell at the end. The internal component (7) is further horizontally supported at the middle (11) of the steel shell (2). Thus the internal component (7) is a vertical cantilever with a tip mass. The outer component is shell with a diametric stiffener. Both the components are held fixed at the bottom (12). The annular space between external and internal components is filled with a medium that is under high pressure. The central core of current transformer is like a free standing vertical cantilever with a large tip mass. This type of arrangement is quite all right during the normal operation where only internal pressure is acting. But, during any other situation where lateral loads are likely to come, this arrangement may not be adequate. The situations where lateral loads come on such tall (slender) structures are, wind seismic and transportation. As the inner core is housed in a shell, it would not face the wind directly. The structure may or may not see the seismic event during its life. But what it cannot escape is the seismic like loads experienced during transportation. The severity of loading during transportation on a rough road and that during a seismic event may be identical. Moreover during seismic event the input is felt only at the base. During transportation the inputs would be felt at all the support points. Hence it is necessary to ascertain the adequacy of supporting arrangement during transportation. It would then be adequate during seismic event also. From operational point of view, it is imperative that the entire assembly, with evacuation etc. is done in the workshop itself and the whole assembly is transported (one piece) to the place of installation. The assembly has to necessarily withstand the shock loads or precisely the random vibration loads arising from travel on rough roads. It is quite obvious that the free standing cantilever (FSC), which would be in horizontal position during transportation cannot be transported without support at the tip (T). The configuration is schematically shown in Fig. 2. From this figure it can be seen that the supports (S1, S2, S3) can come only on outer shell (OS). There are three supports (S1, S2, S3) and hence the outer structure (OS) now becomes a propped cantilever (PCL) and not the free standing cantilever (FSC). But the inner core assembly (IC) is still a free standing cantilever (FSC). This needs a support. The support for the tip mass, must come from the outer shell (OS) only. The proposed support is schematically shown in Fig. 3 As the support has to be, necessarily inside, from electrical considerations, it cannot be a metallic support. It has to be made from an insulating material. With dual requirements of strength and insulation it is proposed to be made from Fiber Reinforced Plastic (FRP). The disclosure a describes a cylindrical supporting arrangement envisaged from various other considerations. It is decided to use a 300 mm dia and 20 mm thick FRP cylinder. The cylinder is properly contoured such that it sits properly on the cylindrical core on one end and is firmly secured to the top cover, on the other. The design criteria envisaged here is that of determining stresses and deflection levels in this cylinder for the random input given at the support locations. Hence the present invention undertakes a stress and deflection analysis with a random vibration input, given in terms of a typical Power Spectral Density (PSD) for road travels, which is essential in arriving at desired material composition. The finite element model is used for this analysis. The boundary conditions are that, two supports on the outer shell (OS) in global x direction are given. This is shown in Fig. 4. One additional support in axial direction at the top is also given. These additional supports simulate the situation during transportation. The typical PSD function for road inputs has been taken considered and an analysis is carried out to see the response of the structure for the above PSD input without top support. These analyses are carried out using Spectrum Analysis facility available in ANSYS. The procedure is to carry out Modal analysis for the same boundary conditions required to simulate fixity in transportation. The Modal analysis is followed by Spectrum analysis. It is seen that the inner core assembly which gets excitation from the base undergoes a large deflection and as a consequence has high stresses at the fixed end. This means, if the assembly is transported without top support the core would undergo large vertical oscillations causing damage to the core assembly and central electrode. This damage may the predominant one and not the stress failure at the fixed end. This clearly prompts that the inner core must be arrested in vertical direction. The next analysis is carried out for the top support in the form of a -hollow cylinder. The other end of the hollow cylinder is firmly secured with outer shell cover which in turn has two additional supports. Thus the enhanced rigidity of outer shell (due to three supports) is transferred to the inner core through elasticity of the hollow cylinder. Thus in the process of arresting the downward movement, the FRP cylinder gets stressed. The analysis is to determine the stresses and deflection in hollow cylinder. The stresses and deflections in the support cylinder are shown in Figs.5 and 6 respectively. The new FRP cylinder for the supporting the core is depicted in Fig7. This cylinder made up of top cover, vertical support and bottom cover on core with suitable vertical stiffeners is envisaged in this patent for safe operation during transport as well as due to seismic disturbances duri operations. WE CLAIM 1. An improved insulated support device for preventing movement of a core assembly of a transmission equipment due to random excitation under dynamic transportation and seismic disturbances of the equipment while in operation, the device comprising : - a hollow enclosure structure having a higher diameter bulb-shaped shell (2) at an upper part, a small diameter shell (1) at a lower part, and a flattened dished end at top (3); the flat portion (3) having a hole closeable by means of a bolt which is housed j.n a cover (4), the bolt being flanged on the cover (4); - the end of the cover (4) supporting a cantilever end (5) of an internal component (7); - an electrode (9) passing through a hollow horizontal cylinder (8) of the internal component (7) and is supported at both end of the upper shell (2); - the internal component (7) is further horizontally supported at the middle (11) at both end of the upper shell (2); - the lower part (1) of the shell is fixed at the bottom (12); - wherein the cantilever end (5) of the internal component (7) is supported by at least three members (S1, S2, S3) from the outer shell (S) which absorb the shock loads, vibration, seismic disturbances during the transportation. 2. The insulating support device as claimed in claim 1 wherein the upper bulb-shaped shell (2) is made of steel and the lower shell (1) is made of fibre re-inforcement plastic. 3. The insulating support device as claimed in claim 1 wherein the hollow enclosure is filled with a medium that is under pressure. 4. An improved insulated support device for preventing movement of a core assembly of a transmission equipment due to random excitation under dynamic transportation and seismic disturbances of the equipment while in operation, as substantially described and illustrated herein with reference to the accompanying drawings. ABSTRACT TITLE : 'AN IMPROVED INSULATED SUPPORT DEVICE FOR PREVENTING MOVEMENT OF A CORE ASSEMBLY OF A TRANSMISSION EQUIPMENT' This invention relates to an improved insulated support device for preventing movement of a core assembly of a transmission equipment due to random excitation under dynamic transportation and seismic disturbances of the equipment while in operation, the device comprising; a hollow enclosure structure having a higher diameter bulb-shaped shell (2) at an upper part, a small diameter shell (1) at a lower part, and a flattened dished end at top (3); the falt portion (3) having a hole closeable by means of a bolt which is housed in a cover (4), the bolt being flanged on the cover (4); the end of the cover (4) supporting a cantilever end (5) of an internal component (7); an electrode (9) passing through a hollow horizontal cylinder (8) of the internal component (7) and is supported at both end of the upper shell (2); the internal component (7) is further horizontally supported at the middle (11) at both end of the upper shell (2); the lower part (1) of the shell is fixed at the bottom (12); wherein the cantilever end (5) of the internal component (7) is supported by at least three members (S1, S2, S3) from the outer shell (S) which absorb the shock loads, vibration, seismic disturbances during the transportation.

Full Text

FIELD OF THE INVENTION
This invention relates to a supporting arrangement of a magnetic core, under the
category of UHV unconventional current transformers employed in the 765 kV
substations to carry out the tasks of metering and protection functions.
BACKGROUND OF THE INVENTION
In view of the impulse test voltages prescribed under IEC and critical design
specifications imposed by the power utilities, the height of the CT structure goes
beyond 9 meters and consequently the secondary cores stand elevated to 8
meters above the ground level. The net weight of six magnetic steel cores is
close to 500 kgs and as such, the structure experiences a cantilever type of load
in the absence of any support on the stop side. Therefore, it needs to be solidly
held in position without any movement during transport as well as in operation.
This becomes very important in view of the fact that the core assembly (ground
potential) is surrounded by high voltage in all directions. Any slight movement
due to any reason could lead to electrical failure of the equipment. The causes
for the movement are mainly attributed to eratic loads experienced during
transportation and seismic events. Of these two loads, the load during
transportation is definitely experienced (the seismic activity may or may not
occur) and is of a higher magnitude. Hence qualification of structure for
transportation along a rough road (during which the structure would lie in
horizontal position) would become an essential requirement. With the arresting
component in place, the cantilever response should reduce to acceptable level
and in the process the stresses in the component must also be acceptable.

OBJECTS OF THE INVENTION
It is therefore an object of the invention to provide an improved insulated
supporting device which prevents random excitation in transportation of tail
transmission equipment.
Another object of the invention is to provide an improved insulated supporting
device which eliminates seismic disturbances of the tall transmission equipment
during its operation.
A further object of the invention is to provide an improved insulated supporting
device which prevents magnetic core failure of the current transformers during
transportation including the operation of the equipment.
A still further object of the invention is to provide an improved insulated
supporting device which exhibits insulated material property.
A still another object of the invention is to provide an improved insulated
supporting device which ensures that the tip of the free-standing structure with
end mass experiencing cantilever load is restrained.
SUMMARY OF THE INVENTION
Accordingly, a FRP cylinder of suitable dimensions and mechanical strength is
provided to arrest the movement of the core assembly. Based on the height of
the structure and weight of the core assembly, a FRP Tube that can stand the

mechanical stresses is configured and disposed to prevent random excitation in
transportation of tall transmission equipment including eliminating seismic
disturbances during operation of the equipment.
The design variants (from electrical considerations) being used in the
development are of state of the art technology and are completely aimed at
getting over the drawbacks that are experienced in the conventional oil filled CT
technology. Besides oil, the associated components also undergo a major change
in the present development, thus paving way for a completely new technology as
demanded by power utilities.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
Fig. 1 - shows a schematic view of FRC cylindrical cover in vertical position as
per present invention
Figs. 2 & 3 - shows a schematic view of FRC cylinder cover in horizontal position
with protecting supports as per present invention
Fig. 4 - shows a schematic view of FRC cylinder cover at top support as per
present invention.
Figs. 5 & 6 - shows stress & deflection in the cylinder.
Fig. 7 - shows stress and deflection of FRP cylinder for supporting the core
during transportation

DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT OF THE
INVENTION
As shown in fig - 1, a FRP cylinder with suitable dimension and mechanical
strength is provided to arrest the movement of core assembly. FRP cylindrical
tube comprises an enclosure made of fiber reinforced plastic which houses the
internal components.
The enclosure is a shell like structure having smaller diameter at a lower part (1)
made of fiber reinforced plastic (FRP) and a higher diameter at an upper end (2)
made of steel having a flattened dished end at top (3). The flat portion (3) has a
hole which is closed by means of a bolted cover (4). The bolts are housed in a
flange which is a part of the cover (4). The end of the cover (4) supports a
cantilever end (5) of an internal component (7) by means of a FRP cylinder (6).
The internal component (7) is made of a long hollow vertical cylinder with a
hollow horizontal cylinder (8) at the top. An electrode (9) passes through this
cylinder (8) and is supported in the shell at the end. The internal component (7)
is further horizontally supported at the middle (11) of the steel shell (2). Thus
the internal component (7) is a vertical cantilever with a tip mass. The outer
component is shell with a diametric stiffener. Both the components are held fixed
at the bottom (12).
The annular space between external and internal components is filled with a
medium that is under high pressure.

The central core of current transformer is like a free standing vertical cantilever
with a large tip mass. This type of arrangement is quite all right during the
normal operation where only internal pressure is acting. But, during any other
situation where lateral loads are likely to come, this arrangement may not be
adequate. The situations where lateral loads come on such tall (slender)
structures are, wind seismic and transportation. As the inner core is housed in a
shell, it would not face the wind directly. The structure may or may not see the
seismic event during its life. But what it cannot escape is the seismic like loads
experienced during transportation. The severity of loading during transportation
on a rough road and that during a seismic event may be identical. Moreover
during seismic event the input is felt only at the base. During transportation the
inputs would be felt at all the support points. Hence it is necessary to ascertain
the adequacy of supporting arrangement during transportation. It would then be
adequate during seismic event also.
From operational point of view, it is imperative that the entire assembly, with
evacuation etc. is done in the workshop itself and the whole assembly is
transported (one piece) to the place of installation. The assembly has to
necessarily withstand the shock loads or precisely the random vibration loads
arising from travel on rough roads.
It is quite obvious that the free standing cantilever (FSC), which would be in
horizontal position during transportation cannot be transported without support
at the tip (T). The configuration is schematically shown in Fig. 2.

From this figure it can be seen that the supports (S1, S2, S3) can come only on
outer shell (OS). There are three supports (S1, S2, S3) and hence the outer
structure (OS) now becomes a propped cantilever (PCL) and not the free
standing cantilever (FSC). But the inner core assembly (IC) is still a free standing
cantilever (FSC). This needs a support. The support for the tip mass, must come
from the outer shell (OS) only. The proposed support is schematically shown in
Fig. 3
As the support has to be, necessarily inside, from electrical considerations, it
cannot be a metallic support. It has to be made from an insulating material. With
dual requirements of strength and insulation it is proposed to be made from
Fiber Reinforced Plastic (FRP).
The disclosure a describes a cylindrical supporting arrangement envisaged from
various other considerations. It is decided to use a 300 mm dia and 20 mm thick
FRP cylinder. The cylinder is properly contoured such that it sits properly on the
cylindrical core on one end and is firmly secured to the top cover, on the other.
The design criteria envisaged here is that of determining stresses and deflection
levels in this cylinder for the random input given at the support locations. Hence
the present invention undertakes a stress and deflection analysis with a random
vibration input, given in terms of a typical Power Spectral Density (PSD) for road
travels, which is essential in arriving at desired material composition.

The finite element model is used for this analysis. The boundary conditions are
that, two supports on the outer shell (OS) in global x direction are given. This is
shown in Fig. 4. One additional support in axial direction at the top is also given.
These additional supports simulate the situation during transportation.
The typical PSD function for road inputs has been taken considered and an
analysis is carried out to see the response of the structure for the above PSD
input without top support. These analyses are carried out using Spectrum
Analysis facility available in ANSYS. The procedure is to carry out Modal analysis
for the same boundary conditions required to simulate fixity in transportation.
The Modal analysis is followed by Spectrum analysis.
It is seen that the inner core assembly which gets excitation from the base
undergoes a large deflection and as a consequence has high stresses at the fixed
end. This means, if the assembly is transported without top support the core
would undergo large vertical oscillations causing damage to the core assembly
and central electrode. This damage may the predominant one and not the stress
failure at the fixed end. This clearly prompts that the inner core must be arrested
in vertical direction.
The next analysis is carried out for the top support in the form of a -hollow
cylinder. The other end of the hollow cylinder is firmly secured with outer shell
cover which in turn has two additional supports. Thus the enhanced rigidity of
outer shell (due to three supports) is transferred to the inner core through
elasticity of the hollow cylinder. Thus in the process of arresting the downward
movement, the FRP cylinder gets stressed. The analysis is to determine the

stresses and deflection in hollow cylinder. The stresses and deflections in the
support cylinder are shown in Figs.5 and 6 respectively. The new FRP cylinder for
the supporting the core is depicted in Fig7.
This cylinder made up of top cover, vertical support and bottom cover on core
with suitable vertical stiffeners is envisaged in this patent for safe operation
during transport as well as due to seismic disturbances duri operations.

WE CLAIM
1. An improved insulated support device for preventing movement of a core
assembly of a transmission equipment due to random excitation under
dynamic transportation and seismic disturbances of the equipment while
in operation, the device comprising :
- a hollow enclosure structure having a higher diameter bulb-shaped
shell (2) at an upper part, a small diameter shell (1) at a lower
part, and a flattened dished end at top (3);
the flat portion (3) having a hole closeable by means of a bolt
which is housed j.n a cover (4), the bolt being flanged on the cover
(4);
- the end of the cover (4) supporting a cantilever end (5) of an
internal component (7);
- an electrode (9) passing through a hollow horizontal cylinder (8) of
the internal component (7) and is supported at both end of the
upper shell (2);
- the internal component (7) is further horizontally supported at the
middle (11) at both end of the upper shell (2);

- the lower part (1) of the shell is fixed at the bottom (12);
- wherein the cantilever end (5) of the internal component (7) is
supported by at least three members (S1, S2, S3) from the outer
shell (S) which absorb the shock loads, vibration, seismic
disturbances during the transportation.

2. The insulating support device as claimed in claim 1 wherein the upper
bulb-shaped shell (2) is made of steel and the lower shell (1) is made of
fibre re-inforcement plastic.
3. The insulating support device as claimed in claim 1 wherein the hollow
enclosure is filled with a medium that is under pressure.
4. An improved insulated support device for preventing movement of a core
assembly of a transmission equipment due to random excitation under
dynamic transportation and seismic disturbances of the equipment while
in operation, as substantially described and illustrated herein with
reference to the accompanying drawings.

ABSTRACT

TITLE : 'AN IMPROVED INSULATED SUPPORT DEVICE FOR
PREVENTING MOVEMENT OF A CORE ASSEMBLY OF A TRANSMISSION
EQUIPMENT'
This invention relates to an improved insulated support device for preventing
movement of a core assembly of a transmission equipment due to random
excitation under dynamic transportation and seismic disturbances of the
equipment while in operation, the device comprising; a hollow enclosure
structure having a higher diameter bulb-shaped shell (2) at an upper part, a
small diameter shell (1) at a lower part, and a flattened dished end at top (3);
the falt portion (3) having a hole closeable by means of a bolt which is housed in
a cover (4), the bolt being flanged on the cover (4); the end of the cover (4)
supporting a cantilever end (5) of an internal component (7); an electrode (9)
passing through a hollow horizontal cylinder (8) of the internal component (7)
and is supported at both end of the upper shell (2); the internal component (7)
is further horizontally supported at the middle (11) at both end of the upper shell
(2); the lower part (1) of the shell is fixed at the bottom (12); wherein the
cantilever end (5) of the internal component (7) is supported by at least three
members (S1, S2, S3) from the outer shell (S) which absorb the shock loads,
vibration, seismic disturbances during the transportation.

Documents:

00099-kol-2008-abstract.pdf

00099-kol-2008-correspondence others.pdf

00099-kol-2008-description provisional.pdf

00099-kol-2008-form 1.pdf

00099-kol-2008-form 2.pdf

00099-kol-2008-form 3.pdf

00099-kol-2008-gpa.pdf

99-KOL-2008-(01-08-2012)-CORRESPONDENCE.pdf

99-KOL-2008-(27-02-2012)-ABSTRACT.pdf

99-KOL-2008-(27-02-2012)-AMANDED CLAIMS.pdf

99-KOL-2008-(27-02-2012)-DESCRIPTION (COMPLETE).pdf

99-KOL-2008-(27-02-2012)-DRAWINGS.pdf

99-KOL-2008-(27-02-2012)-EXAMINATION REPORT REPLY RECEIVED.pdf

99-KOL-2008-(27-02-2012)-FORM-1.pdf

99-KOL-2008-(27-02-2012)-FORM-2.pdf

99-KOL-2008-(27-02-2012)-FORM-3.pdf

99-KOL-2008-(27-02-2012)-OTHERS.pdf

99-KOL-2008-ABSTRACT-1.1.pdf

99-KOL-2008-CLAIMS.pdf

99-KOL-2008-CORRESPONDENCE-1.1.pdf

99-kol-2008-CORRESPONDENCE-1.2.pdf

99-kol-2008-CORRESPONDENCE.pdf

99-KOL-2008-DESCRIPTION COMPLETE.pdf

99-KOL-2008-DRAWINGS.pdf

99-kol-2008-EXAMINATION REPORT-1.1.pdf

99-kol-2008-EXAMINATION REPORT.pdf

99-kol-2008-FORM 18-1.1.pdf

99-kol-2008-form 18.pdf

99-KOL-2008-FORM 2-1.1.pdf

99-KOL-2008-FORM 5.pdf

99-kol-2008-GPA-1.1.pdf

99-kol-2008-GPA.pdf

99-kol-2008-GRANTED-ABSTRACT.pdf

99-kol-2008-GRANTED-CLAIMS.pdf

99-kol-2008-GRANTED-DESCRIPTION (COMPLETE).pdf

99-kol-2008-GRANTED-DRAWINGS.pdf

99-kol-2008-GRANTED-FORM 1.pdf

99-kol-2008-GRANTED-FORM 2.pdf

99-kol-2008-GRANTED-FORM 3.pdf

99-kol-2008-GRANTED-FORM 5.pdf

99-kol-2008-GRANTED-SPECIFICATION-COMPLETE.pdf

99-kol-2008-REPLY TO EXAMINATION REPORT-1.1.pdf

99-kol-2008-REPLY TO EXAMINATION REPORT.pdf

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Patent Number

260445

Indian Patent Application Number

99/KOL/2008

PG Journal Number

18/2014

Publication Date

02-May-2014

Grant Date

30-Apr-2014

Date of Filing

14-Jan-2008

Name of Patentee

BHARAT HEAVY ELECTRICALS LIMITED

Applicant Address

REGIONAL OPERATIONS DIVISION (ROD), PLOT NO: 9/1, DJ BLOCK 3RD FLOOR, KARUNAMOYEE, SALT LAKE CITY, KOLKATA-700091 registered office at BHEL HOUSE, SIRI FORT, NEW DELHI-110049

Inventors:

#	Inventor's Name	Inventor's Address
1	PILLARISETTI MEHER LAKSHMI PRASAD	DESIGN ANALYSIS GROUP, CORPORATE RESEARCH AND DEVELOPMENT DIVISION, BHARAT HEAVY ELECTRICALS LTD, VIKASNAGAR, HYDERABAD 500093
2	KANAKAGIRI SIVI RAMA PRASAD	DESIGN ANALYSIS GROUP, CORPORATE RESEARCH AND DEVELOPMENT DIVISION, BHARAT HEAVY ELECTRICALS LTD, VIKASNAGAR, HYDERABAD 500093
3	SAMBU SATYANARAYANA	DESIGN ANALYSIS GROUP, CORPORATE RESEARCH AND DEVELOPMENT DIVISION, BHARAT HEAVY ELECTRICALS LTD, VIKASNAGAR, HYDERABAD 500093
4	DR. PRAMOD BHASKAR GODBOLE	DESIGN ANALYSIS GROUP, CORPORATE RESEARCH AND DEVELOPMENT DIVISION, BHARAT HEAVY ELECTRICALS LTD, VIKASNAGAR, HYDERABAD 500093

PCT International Classification Number

B21D37/20,C21D8/00

PCT International Application Number

N/A

PCT International Filing date

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1			NA