Powertemple - Complete Overview

Introductory

"This system is designed to operate for 11 kV / 22 kV/ 33 kV H.T. Consumers. This is basically for taking H.T. supply for the new establishments or for converting O.H lines/ H.T. Sub-station of existing establishments”

This arrangement is simple and safe arrangement for making and breaking of H.T. Supply. H.T. Consumers with H.T. Metering arrangements with necessary protection fuses.
Due to availability of very good insulating materials, the clearances can be minimized. Due to the canopy provided, birding is totally eliminated. Clearances are as per I.E. Rules applicable for air insulation, indoor switchgear.
Earlier porcelain insulators along with alkathine pipe for conductor insulation was used. Due to epoxy insulators and Raychem insulation the size of total switchgear has been reduced.

Specifications

New System

The invention relates to setting up of new arrangement for power supply system, for 11 kV, 22 kV, & 33 kV power supply system.

In the conventional set up 11/22/33 kV Power supply system made with 4 Pole structure arrangements. In this 4 pole structure arrangement, various problems like heavy erection work, requirement of more space, more faults percentage during rainy season due to outdoor system. The drawings are enclosed to have ready reference.

In case of Kiosk, H.T. Cable is required for Kiosk as incoming and outgoing. The conventional power supply system is exposed to atmosphere causing problems due to bird faults etc. and it is also unsafe and uncomfortable to rectify the faults especially during heavy downpour.

The object of the invention is to devise a system for obviating the above mentioned problems, and to make the power supply system safer and to give an aesthetically better outlook. The necessary drawings are enclosed for ready reference.

It is also the object of the invention to reduce space requirement (applicable mainly in urban areas) and to eliminate the hurdle due to installation of the system in the front portion of the establishment. With this invention, it is easy to have a system which is very simple in construction, easy for operation and also available at affordable price with better aesthetics.

Thus, according to this invention, the power supply system shall be housed in pre-fabricated FRP Fiber glass / sheet metal casing of size 2.5 mtr X 2.5 mtr with partition for metering room, with underground cabling using GI structure. Copper Bus bars and terminals encased with Raychem sleeves shall be used and a clearance is kept as per IE Rules. Against the double stack insulators used in the existing system, single stack insulators shall be used in this new system as birding is not there.

In this new system Gang Operating Devices (G.O.D.) operation is with gear boxes duly packed with grease, thus ensuring trouble-free operation. Besides the above, the new system also provides lockable doors for operation and maintenance.

The level of insulation is maintained during all seasons by providing thermostat space heaters, and moisture formation is avoided. The cabin is Rodent Vermin proof construction.

In this system supply company metering arrangement is made just below the CT / PT unit behind the see through lockable glass window. Due to this, tampering with metering system is not possible and revenue will not be affected since primary and secondary of CT / PT are totally enclosed. Hence, proper billing can be achieved and stealing of electricity is totally prevented.

Over and above without using CT / PT unit & meter, the balance portion of the Kiosk can be used for replacement of 4-pole structure of 2-pole structures which are used by supply companies on roadside. These arrangements shall avoid the hazards such as falling of structures due to severe weather conditions or accidental falling of maintenance staff from heights, preventing excess expenditure involved therein.

Comparison

EXISTING	PROPOSED

Open to Atmosphere - outdoor type	Enclosed - Indoor Type
Point of operation is just below the system. Risk of Operator getting affected by sparks, etc. exists.	Point of Operation is far away from the system. Risk of sparks falling on the operator is totally eliminated.
Operation is by simple links and levers. Contact settings get disturbed during operations.	Operation is by gear link solid shaft coupled with earth switch for outgoing cable earthing when G.O.D. is made off.
Access for maintenance is difficult due to height of system (11 mtr.)	Easy access for maintenance being indoor and at lesser height (3 mtr.)
Transportation, installation, operation and maintenance are difficult because of the height.	Transportation, installation, operation and maintenance are very easy.
Difficult to identify and rectify faults during down pour.	No difficulty.
Separate Meter Room of area 3 mtr. x 3 mtr. is required.	No separate meter room is required as Metering system is part of the KIOSK.
Lightning Arrestor is required since it is an out-door system.	Lightning Arrestor not required as it is an indoor system.
More No. of earthing pits are required.	Less No. of earthing pits are required.
Space requirement is more say 5 mtr X 5 mtr and separate meter room of size 3 mtr X 3 mtr. Plus transformer space of 3 mtr X 3 mtr.	Space requirement is less, say 3 mtr. X 3 mtr. and no separate space is required for meter room. Plus transformer space.
Transportation of total system is not possible in one truck in one trip.	Transportation of total system is possible in one truck in one trip.
Requires periodic painting	No painting is required as the material of construction is Galvanized.
Point of supply is located at the front portion thereby affecting the aesthetic outlook of establishment.	Due to less height of the cabin (FRP/ Fibre Glass cabin) better outlook is ensured.
Overhead conductors are provided. Due to this, possibility of snapping of conductor exists.	Underground cabling. And inside Kiosk bus bars with Raychem insulation are provided. Due to nut bolting arrangement no possibility of snapping of bus bars exists.
Reliability of supply cannot be assured, since it is open system.	Ensures Reliability of supply.
Fencing, metal spreading required.	Not Required.
Annual Painting and preventive maintenance required.	Annual painting not required. Preventive maintenance very less.
G.O.D. and D.O. mechanical operations and contacts gets affected due to atmosphere (rain and pollution)	Due to enclosure, there is no such possibility.
Replacement of D.O. is very difficult job because of height.	D.O.'s can be changed very easily, since height is very less.
MSED Kiosk which is of metal body it is not advisable to go near kiosk with umbrella in rainy season.	It is possible to go near the temple in rainy season with umbrella.
With metal Kiosk following are the disadvantages:	By using FRP following are the advantages:
a) It is an electrical conducting material.	a) It is an insulating surface.
b) Corrosion Problem	b) No Corrosion.
c) Thermal Conductivity	c) No thermal conductivity.
For 4 pole structure arrangement standardization is not there.	Power temple is a step towards standardization.

Sectional View

Variants in Existent System


1 Incoming & 1 Outgoing With Metering	1 Incoming & 1 Outgoing Without Metering	1 Incoming & 2 Outgoing	1 Incoming & 3 Outgoing	2 Incoming & 1 Outgoing For 11kV, 22kV & 33kV