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“PIC”(PIPE IN CAGE) technology
is used to overcome many of the problems caused by galvanic corrosion which can take place between dissimilar metals buried in close proximity. Other advantages of “PIC” are that they are highly resistant to corrosion and are much more anodic than copper. |
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WHY DO WE NEED TO HAVE GOOD EARTHING?
The earthing system is an essential element for the electrical system security and it is required to:
Allow for protective devices activation when there is an insulation fault.
Equalize the potential of conductive parts that can be accessed simultaneously, with the potential in the surrounding soil in order to prevent people from being exposed to hazardous voltages.
Allow the lightning strike energy to be safely dissipated.
To reduce electromagnetic interferences.
Terminology
In Britain, people have 'earth' and in Northern America they have 'ground'. They are exactly the same thing, only different terms are used in different countries.
EARTHING system has three main purposes:
- Over voltage protection
Lightning, line surges or unintentional contact with higher voltage lines can cause dangerously high voltages to the electrical distribution system wires. Earthing provides an alternative path around the electrical system of your home or workplace minimizes damage from such occurrences.
- Voltage stabilization
There are many sources of electricity. Every transformer can be considered a separate source. If there were not a common reference point for all these voltage sources it would be extremely difficult to calculate their relationships to each other. The earth is the most omnipresent conductive surface, and so it was adopted in the very beginnings of electrical distribution systems as a nearly universal standard for all electric systems.
- Current path in order to facilitate the operation of over current devices
This purpose of Earthing is the most important one to understand. Earthing system provides certain level of safety to humans and property in case of equipment damages.
Earthing operation in electrical distribution network
The main reason why Earthing is used in electrical distribution network is the safety: when all metallic parts in electrical equipments are grounded then if the insulation inside the equipments fails there are no dangerous voltages present in the equipment case. If the live wire touches the grounded case then the circuit is effectively shorted and fuse will immediately blow. When the fuse is blown then the dangerous voltages are away. |
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What are our findings?
After lots of concentration on these types of issues we thought that there must be improvement in two areas. [1] Material used as earth electrode should have very high rust resistive property and good current conductive property. [2] Total contact area of electrode with earth should be as possible as maximum. As a result of this thought we tried to develop special design of earth electrode by which we can get both the benefits.
What we offer as a best solution for earthing problems?
PIPE IN CAGE technology is the solution we offer for any earthing related problems. Especially we are the first company in India to develop the alloy of Nickel and stainless steel having very high rust resistive property and good current conductive property.
Beauty of the our Steel Earthing electrode is in its design. We had construct this earthing electrode with special alloy in such a fashion that we can get total contact area of electrode with earth is as possible as maximum.
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Types of Earth Electrode
At one time or another, all manners of conductor materials and shapes have been installed in the ground to provide an electrical earth. These materials range from cast iron plates, tubes, galvanized steel stakes, copper strip, metallic electrode, wire and water pipe
Taking into account conductivity, high resistance to atmospheric corrosion and soil attack, ease and economy of installation and overall reliability, the pipe in cage made from stainless steel alloy has proven its superiority over all others
The pipe in cage electrode is simple to install, its connection to the earthing system is easily made, and the installation is readily accessible for inspection and test |
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Steel Core Electrodes have the best attributes
Electrically, a good earth electrode should have a low intrinsic resistance and be of sufficient section to carry high currents without damage when called upon
Mechanically, its physical properties should exhibit strength, have a rigid core for easy driving and be of durable, corrosion resistant material
Earth Electrode Length more important than Earth Electrode diameter
Apart from considerations of mechanical strength, there is little advantage to be gained from increasing the earth electrode diameter with the object in mind of increasing surface area in contact with the soil
The usual practice is to select a diameter of earth electrode, which will have enough strength to enable it to be driven into the particular soil conditions without bending or splitting. Large diameter electrode may be more difficult to drive than smaller diameter electrode
The depth to which an earth electrode is driven has much more influence on its electrical resistance characteristics than has its diameter.
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Copper vs. Stainless Steel
The permanence of copper in most soils, its resistance to chemical attack, and its inherent low resistance, brings it into widespread use throughout the electrical industry around the world
However, there are certain soils where it is inadvisable to use copper such as in tidal land salt marshes, swamps, and land filled with ashes, coke breeze and like materials
Pipe in cage electrode have a high resistance to both atmospheric and soil corrosion as it made from stainless steel with zinc |
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Typical of the applications where stainless steel Pipe in cage electrode are favored over copper clad is
- Where the chemical composition of the soil reacts more unfavorably than copper as per conditions described above
- Where the earthed item needs to be protected against galvanic attack and corrosion, eg. lead sheathed cables, steel poles, etc.
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| Our PIC Product Over comes the problems faced in below mentioned conventional Earthing Methods. You can view the installation details in our installaton section |
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Transformer Services |
We purchase old transformers and Sell Old transformers
The Bhagyoday Engineering Was established in 1990
C-1/I-52 GIDC Estate , Vitthal Udyognagar- 388 121 Via Anand
For Overhaluing of any distribution Transformer we are having a expert team who can work at site as well as at workshop.We have expirence of 20 yrs in this field and providing expert service to reduce transformer faliure rate.
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Conventional method of earthing: |
Plate type Earthing:
Generally for plate type earthing people are using cast iron plate of size 600 mm * 600 mm * 12 mm. OR Galvanized iron plate of size 600 mm * 600 mm * 6 mm. OR Copper plate of size 600 mm * 600 mm * 3.15 mm and burred at the depth of 8 feet in the vertical position and GI strip of size 50 mm*6 mm bolted with the plate is brought up to the ground level. These types of earth pit are generally filled with alternate layer of charcoal & salt up to 4 feet from the bottom of the pit. |
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Pipe type Earthing:
Generally for pipe type earthing people are using GI pipe [C-class] of 75 mm diameter, 10 feet long welded with 75 mm diameter GI flange having 6 numbers of holes for the connection of earth wires and inserted in ground by auger method. These types of earth pit are generally filled with alternate layer of charcoal & salt or earth reactivation compound. |
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After 3 to 5 years what is happening with these types of Earthing?
All plates OR pipes used get rusted and corroded due to oxidation process under the soil. Once rusting & corrosion start its resistance [ohm] value increased and so many issues start in electrical distribution system like voltage fluctuation, neutral floating and unbalance current flow from circuits.
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| PLATE TYPE AFTER 3 to 5 Years (Click Images For Larger View) |
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| PIPE TYPE AFTER 3 to 5 Years (Click Images For Larger View) |
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