FIELD OF THE INVENTION
The present invention generally relates to three phase gas insulated
switchgear and particularly to three phase gas insulated switchgear
being operated by slow/medium speed operated drives. In other words,
the invention is to a housing to accommodate the drive and its support
system.
BACKGROUND OF THE INVENTION
The three phase gas insulated switchgear modules in particular
slow/medium speed operating switchgears such as, for example,
maintenance earthing switches, fault proof earthing switches and
disconnecting switches are integrated using motor-gear box arrangement
with suitable cams, proximity sensors, couplings and mounting
arrangement. Further, the above arrangement needs to be protected from
different environmental hazards. Furthermore, the aforesaid
arrangement is integrated to gas insulated switchgear without loading of
it.
Conventionally, in order to protect the aforesaid arrangement from
environmental hazards, the gas insulated switchgear implements
integrated housing. The implemented drive housing as disclosed by the
existing art houses total drive system and facilitates electrical connection
to the motor, gearbox, proximity sensors etc. with the drive system
facilitating usage of the gas insulated switchgear for both indoor and
outdoor applications. Further, in conventional systems, drive consists of
said modules and is coupled to gas insulated switchgear with suitable
coupling. The conventional mechanism is part of the housing and all of
said modules are to be disconnected from gas insulated switchgear for
assembly, maintenance and replacement. Such conventional set ups may
require special arrangements to work under different weather conditions.

The art offers a variety of mechanisms for housing a drive system. For
example, the US patent US6563066B1 to Abroy discloses switch
mechanism housing. More particularly, said patent proposes an
apparatus for housing and securing a switch operating mechanism. Said
switch mechanism housing includes a housing member with an integral
pivot bushing, a housing cover, an operating mechanism including a
push rod assembly, a rotor cam, and mechanism shaft. Further, the
operating mechanism is installed and fixed in the housing member.
Lastly, the housing member holds captive the operating mechanism
without requiring that the housing cover be in place, thereby facilitating
fabrication and assembly.
In another example, the US patent US5777283A to Greer illustrates a
switch mechanism and base for a disconnect switch. More particularly,
said patent provides a switch mechanism module and a line base
module, useable separately or in combination, for an interior assembly of
an electrical distribution device having a plurality of modules. Further,
the electrical distribution device has an enclosure with a handle external
to the enclosure for operator control. The switch mechanism module and
line base module include a modular housing having a generally planar
base with upstanding side walls around the circumference of the base.
The side walls have a top edge defining a mating surface. Further, the
modular housing is demountably secured to at least one adjacent module
with a manually operated securement which is integrally formed with the
modular housing.
Further, the US patent US6331684B1 to modular switch mechanism. In
more detail, the disclosed switch mechanism module for a switch
including a first housing member, a second housing member, and an
operating mechanism between the first and second housing members.

The first housing member has first and second integral stops depending
therefrom, and the second housing member has first and second integral
legs depending therefrom. Further, the operating mechanism rotates
upon rotation of the handle of the switch causing rotation of the rotor of
the switch. Moreover, movement of the operating mechanism ceases
upon engagement of the operator cam with the stop of the first housing
member. Further, the integral legs of the second housing member
provide reinforcement for the stops to prevent movement of the stops in
the direction of the rotating cam.
Furthermore, in the US patent US8476546B2 to Abroy is disclosed
Switch assemblies and electrical distribution devices for making and
breaking electrical connections in an electrical circuit. The patent also
discusses an enclosure of varying size for housing the electrical parts.
More particularly, the patent with respect to the housing discloses an arc
suppressing housing which in one variation could be separated from the
electrical switch assembly as disclosed in said patent.
In all of the above cited arts, the person skilled in the art would
understand that in all of the above conventional techniques disclosed,
the drive housings are part of drive module/mechanism. The
conventional drive housing includes an integral pivot bushing, a housing
cover, and an operating mechanism including a push rod assembly, a
rotor cam, and mechanism shaft. At the same time, complete mechanism
requires separate support structure and coupling arrangement. In
conventional covering type, it does not provide protection for the drive
and does not facilitate features like manual operation, guiding of
couplings etc without proper sealing. Further, following are some of the
drawbacks associated with the conventional housing arrangements:

1. Integration of independent drive with gas insulated switchgear
requires separate fixing arrangement and coupling;
2. Conventional mechanisms/drive housings have to be disconnected
from the switchgear for maintenance;
3. Conventional drive housings are not completely approachable to
maintain or replace components of the drive.
Thus, those knowledgeable in the art would appreciate that in order to
overcome the cited problems as they exist in the current art, an improved
drive housing needs to be developed.
OBJECTS OF THE INVENTION
An object of the invention is to overcome the aforementioned and other
drawbacks existing in prior art systems and methods.
Another object of the invention is propose an improved housing for three
phase common drive.
Still another object of the invention is to propose an improved housing
for three phase common drive of gas insulated maintenance and fault
proof earthing switch.
Yet another object of the invention is to propose an improved housing for
three phase common drive of gas insulated disconnector switch.
Another object of the invention is to propose an improved housing
suitable for indoor and outdoor switchgear applications.

Still another object of the invention is to propose an improved housing
with a provision to enable manual drive operation when there is no
power supply.
Another objective of the invention is to propose an improved housing
with a provision to enter and exit of leak proof coupling shafts.
Yet another objective of the invention is to propose an improved housing
with a provision to enter and exit of leak proof operating rod.
Still another objective of the invention is to propose an improved housing
with a provision to provide sealing to external environment.
Still another objective of the invention is to propose an improved housing
with a provision to dismantle the housing without disconnecting the
drive.
Still another objective of the invention is to propose an improved housing
with a provision to couple to the linkages of three phase gas insulated
switchgear drive.
Yet another objective of the invention is to extend electrical connections
to motor, proximity sensors etc. through connectors provided on the
drive housing.
Still further objective of drive housing is to create provision to dismantle
the both top and bottom face of drive housing for maintenance purpose.

SUMMARY OF THE INVENTION
The present application discloses a dismantable type drive housing
apparatus for securing of a three phase drive of gas insulated switchgear
(03A) operated by a slow or medium speed operated switches. In one
embodiment, the slow or medium speed operated switches are operated
by a motor drive. In another embodiment, the motor drive further
comprises a motor (1) operably coupled to a gear box (2) via an operating
shaft (5) operating in one of the three phases and located in the gear box
(2). Further, the motor (1) and gear head (2) are pivotally attached to
guide cum support plate (03) which is being mountably fastened to the
gas insulated switchgear (03A). Further, the apparatus primarily
includes a drive housing member being demountably fastened to the
guide cum support plate (03). In one embodiment, the drive housing
member having a demountable top surface with cover (10) and a
demountable bottom surface with cover having further an aperture (11)
made without discreet sealing. Further, the apparatus includes a link
shaft (09) pivotally attached to the motor drive via an insulated guide
(08), whereby an opposite end of the link shaft (09) is configurably
attached to the gas insulated switchgear (03A). Furthermore, the
apparatus includes a link shaft (09) pivotally attached to the motor drive
via an insulated guide (08). Furthermore, an opposite end of the link
shaft (09) is configurably attached to the gas insulated switchgear (03A).
Further, the apparatus includes a cam and a plurality of proximity
sensors (07) located on the operating shaft (05) operating in one of the
three phases or at least one of the couplers (04) adapted to couple the
operating shaft (5) operating in one of the three phases. In an
embodiment, the cam and the proximity sensors (07) are configured to
perform open and close operation of the slow or medium speed operated
switches of a gas insulated switchgear (03A).

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
The drawings refer to embodiments of the invention in which:
Fig. 1 illustrates conventional housings.
Fig. 2 illustrates configuration of operating drive.
Fig. 3 illustrates drive housing configured for coupling of three phase
system.
Fig. 4 illustrates drive housing supported on gas insulated switchgear.
Fig. 5 illustrates components of drive housing.
Fig. 6a illustrates front view of drive housing connected to gas insulated
switchgear.
Fig. 6b illustrates rear view of drive housing connected to gas insulated
switchgear.
DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT OF THE
INVENTION
Although the disclosure hereof is detailed and exact to enable those
skilled in the art to practice the invention, the physical embodiments
herein disclosed merely exemplify the invention which may be embodied
in other specific structure. While the preferred embodiment has been
described, the details may be changed without departing from the
invention, which is defined by the claims.
It will be apparent, however, to one of ordinary skill in the art that the
present invention may be practiced without specific details of the well
known components and techniques. In other instances, well known

components or methods have not been described in detail but rather in
figures in order to avoid unnecessarily obscuring the present invention.
Further specific numeric references should not be interpreted as a literal
sequential order. Thus, the specific details set forth are merely
exemplary. The specific details may be varied from and still be
contemplated to be within the spirit and scope of the present invention.
The features discussed in an embodiment may be implemented in
another embodiment.
Turning now to the drawings, and referring first to FIG. 1, conventional
housings are illustrated. The reference to the conventional system is
made in order to better distinguish the present inventive disclosure
discussed later in greater detail. The details of the conventional process
for transmitting the load signal to the remote location are well-known in
the art, and therefore, are described herein only in the detail required to
fully disclose the present invention.
Improving upon the conventional techniques discussed at length above,
in the present disclosure. The arrangement of the components as shown
in Fig. 2-6 clearly makes the system as disclosed in the present
application advantageous over the existing arts as would also become
clearer to the knowledgeable in the art with the particulars of the
aforesaid mechanism being described below in greater detail.
Fig. 2 shows configuration of operating drive where a gas insulated
switchgear consisting of a slow/medium operating switches such as, for
example, maintenance earthing switches, fault proof earthing switches
and disconnector switches are being operated by motor drive. In an
embodiment, the drive for the said switches generally consists of motor
(01) with suitable gear box (02). In another embodiment, the drive for
said switches may include a gear head (02A) along with the motor (01)

and the gear box (02A). Further, the motor (01) is selected in such a way
as to operate both in clock wise and anti-clockwise direction depending
on type of operation of the switchgear. In another embodiment, the gear
box (02) is selected with suitable gear ratio and torque suitable to motor.
Further, in an aspect, the present gear box (02) as shown in Fig. 2 has
total four options to extend connection to gas insulated switchgear
equipment or motor drive which is further illustrated in Fig. 6b. In
particular, the options are enumerated as under: First option, in an
aspect is adapted to couple incoming operating shaft (13) to the
operating shaft of first phase or operating rod of the switchgear. Second
option, in another aspect, is adapted to couple outgoing operating shaft
(14) to the operating of second phase or operating rod of the switchgear).
Third option in an aspect is a shaft being coupled to the motor (15).
Fourth option in yet another aspect is the shaft being used for manual
operation of motor (16). In a preferred embodiment, one of the couplers
(04) is configured to couple the operating shaft operating in one of the
three phases to the link shaft (09).
Shown further in Fig. 3, is a drive housing configured for coupling of
three phase system. In one aspect, as shown in Fig. 3 appropriate
couplers (04) being used to connect operating shafts (05) of various
phases i.e. integration of three phases of switchgear with common drive.
The arrangement shown is mounted on a guide cum support plate (03)
with suitable anchors. In an embodiment, there is a condition for gear
box (02) to connect to motor (01) and opposite side of the manually
operating shaft (16) to operate manually in case there is power failure. In
an aspect, the operating shafts (05) of gear box (02) being coupled to
motor (01) also shall be possible through additional gear head (02A) to
achieve further gear ratio. Cam and Proximity sensors (07) provided on

the operating shaft (05) or on couplers (04) used to connect operating
shafts to link shaft as shown in Fig.4 for ensuring the closing and
opening operation of slow or medium speed operating switches.
Further, as shown in Figs. 2-4, the gear box (02) is seated on guide cum
support plate (03) which is firmly fixed to gas insulated switchgear (03A)
with suitable fasteners. In one embodiment, the gear box (02) is coupled
to one phase of gas insulated switchgear on input side and connected to
another phase of gas insulated switchgear (03A) at output side. In a
preferred embodiment, the drive housing (05) is of dismantable type and
is connected to guide cum support plate (03) for self sufficiency. In other
words, drive housing along with components of drive like motor, gear box
etc when connected to guide cum support plate, total drive which is
being used to operate gas insulated switchgear can be achieved.
Further, Fig. 4 shows specifically shows drive housing (06) supported on
a gas insulated switchgear (03A), In an aspect, input side of drive
housing (06) has a provision to enter the input shaft (13) and guided
through insulated guide (08) to seal the drive housing from environment
as well as for the smooth operation of operating shaft (05). Said provision
also facilitates in guiding of link shaft [09] between the phases (first,
second or third) against the load wherein precisely load means friction
offered by couplers, operating shaft and link shaft.
Further as shown in Fig. 5, Top cover of housing (10) has a provision to
dismantle motor (01) and hence supports maintenance services for motor
(01). Further, Bottom cover of the drive housing has an aperture (11)
through which a tool to operate the drive in power failure conditions.
This opening/aperture (11) is made with proper sealing (12)/without
discreet sealing and required to be opened when manual operation is

required. Fig.5, further shows different components of drive housing
being used for gas insulated switchgear. Physically air clearance shall be
created between guide housing (06) and assembly of the drive including
motor (01), gear head (02A) and gear box (02) to limit the temperature of
motor (01) as well as drive housing (06). Further, in order to limit the
vibration of gas insulated switchgear during drive operation, the guide
cum support plate (03) is provided with suitable anchors. In an
embodiment, an operating handle for manual operation may then be
fastened to the link shaft (09) in Fig.5. The manual operation of the slow
speed switches is essential during unusual conditions like power failure
or by-passing electrical interlocks.
Further, Fig. 6a and 6b shows the drive housing connected to gas
insulated switchgear in particular to slow/marginal operating speed
switchgear.
The foregoing is considered as illustrative only of the principles of the
invention. Furthermore, since numerous modifications and changes will
readily occur to those skilled in the art, it is not desired to limit the
invention to the exact construction and operation shown and described.
While the preferred embodiment has been described, the details may be
changed without departing from the invention, which is defined by the
claims.

We claim:
1. A dismantable type drive housing apparatus for securing of a three
phase drive of a gas insulated switchgear (03A) operated by a slow or
medium speed operated switches, wherein the slow or medium speed
operated switches are operated by a motor drive, wherein the motor drive
further comprises a motor (1) operably coupled to a gear box (2) via
shaft coupled to motor (15) and located in the gear box (2) whereby said
motor (1) and gear head (2A) along with gear box (02) pivotally attached
to guide cum support plate (03) is being mountably fastened to the gas
insulated switchgear (03A), and wherein the said apparatus comprising:
a drive housing member being demountably fastened to the guide
cum support plate (03), said drive housing member having a
demountable top surface with cover (10) and a demountable
bottom surface with cover having further an aperture (11) made
without discreet sealing;
a link shaft (09) pivotally attached to the motor drive via an
insulated guide (08), whereby an opposite end of the link shaft (09)
is configurably attached to the gas insulated switchgear (03A);
a cam and a plurality of proximity sensors (07) located on the
operating shaft (05) operating in one of the three phases or at least
one of the couplers (04) adapted to couple the operating shaft (5)
operating in one of the three phases, wherein the cam and the
plurality of proximity sensors (07) are configured to perform open
and close operation of the slow or medium speed operated
switches of a gas insulated switchgear (03A).
2. The apparatus of claim 1, wherein the slow or medium speed operated
switches of a gas insulated switchgear (03A) comprises at least one of an
earthing switch and a disconnector switch.

3. The apparatus of claim 1, wherein the motor (1) is adapted to operate in
at least clockwise and anti-clockwise direction, herein said direction is
decided based on closing or opening operation of the gas insulated
switchgear (03A).
4. The apparatus of claim 1, wherein an incoming operating shaft (13) on
the gear box (2) is configured to connect to the operating shaft (5)
operating in first phase.
5. The apparatus of claim 1, wherein an outgoing operating shaft (14) on
the gear box (2) is configured to connect to the operating shaft (5)
operating in second phase.
6. The apparatus of claim 1, wherein the gear box (2) is configured to
couple a shaft coupled to motor (15) to the motor (01) through gear head
(02A).
7. The apparatus of claim 1, wherein the gear box (2) is configured to
couple a manually operating shaft (16) for manual operation of the motor
(01) in case of power failure.
8. The apparatus of claim 1, wherein the guide cum support plate (03) is
provided with plurality of anchors for restricting vibration of the gas
insulated switchgear (03A).
9. The apparatus of claim1, wherein the at least one of the couplers (04) is
configured to connect operating shaft (05) to the link shaft (09).