WO2001037377A2

WO2001037377A2 - Safe earthing electrode

Info

Publication number: WO2001037377A2
Application number: PCT/IN2000/000098
Authority: WO
Inventors: Ashok Tripathy; Suman Tripathy
Original assignee: Ashok Tripathy; Suman Tripathy
Priority date: 1999-10-11
Filing date: 2000-10-09
Publication date: 2001-05-25
Also published as: AU4101601A; WO2001037377A3

Abstract

This novel safe Earthing Electrode consists of two pipes one inside the other base on 'pipe in pipe technology', which ensures complete earthing efficiency and safety. The outer shell electrode surrounds the inner electrode and is separated by a space. This space is filled with a special compound. This compound is anti-corrosive and has good conducting properties. This electrode has a terminal plate at its top for connecting the plurality of electrical connections with earth electrode.

Description

SAFE EARTHING ELECTRODE (S.E.E)

Technical field

This invention relates to electrical safety devices and as such the invention pertains to electrical engineering and technology.

The novel safe earthing electrode is oriented to the safety of customers and equipment. It is exclusively designed and made for earthing purpose with long life. The latest innovation ensures long life and safety that is the very object of this invention.

Background Art

It is well known in the art that until the invention of this safe earthing electrode, customers are using the method of earthing by putting an iron pipe on the earth and hitting them to penetrate. Somewhere, charcoal and salt will be covered around the pipe and due to the corrosion the essentiality of effective earthing is defeated.

Earthing is a very important area of electrical engineering maintenance. It is a well known fact that generally, people forget about earthing once it is installed, no one checks unless something goes wrong, finds fault in earthing. Therefore Earthing is absolutely necessary to anyone in the universe using electricity. Earthing will ensure safety to our life and appliances. To make Earthing as mandatory, all the appliance manufacturers are forced through standard specifications world wide to provide EARTH TERMINAL worldwide in all electrical appliances and machineries. The third pin (earth pin) in the plugs and sockets play an essential role in human life / sophisticated machineries. By spending very negligible amount for effective earthing one can save precious life. This is the object of the invention. This novel-earthing electrode, which is based on PIPE IN PIPE technology, is introduced by using superior quality of G.I pipes & in between the pipes POWER CONDUCTOR MATERIAL is used, in which earth fault current caused due to faulty appliances, will be rapidly passed to the earth in no time. This latest technology protects the main earthing electrode from corrosion and ensures life to many more decades. This is the salient feature of this invention.

The safe earthing electrode is a complete solution and is suitable to any application requiring reliable earthing. The safe earthing electrode is in different diameter and length.

1 . Type 19 (40mm) for L.T applications (125 volts -650 volts)

2. Type 39 (80mm) for H.T applications (651 volts and above)

Other salient features of the invention are as follows:

• Revolution in earthing technology for domestic, industrial LT & HT users.

• Very simple Fit & Forget installation.

• Corrosion proof, weather proof, water-resistant. Maintenance free, highly durable, life saving and cost effective solution for the lifetime.

• Fluctuation of Ohmic value is least (within safe limits).

Various objectives of Invention

Accordingly the primary object of the invention is to invent a novel earth electrode, which is very safe.

It is another objective of this invention is to invent a novel electrode which is not liable to corrosion.

It is another objective of this invention to invent an earth electrode which is weather proof, water resistant, maintenance proof, highly durable and life saving. Further objects of the invention will be clear by the following description. Accordingly the invention is directed to creation of manufacture of a novel safe earth electrode which comprises a specially shaped inner main electrode, and outer shell electrode surrounding the inner electrode, the said inner electrode and outer electrode being separated by space, the said space being filled with a special compound, the said compound is anticorrosive and having good conducting properties, the terminal plate at the top of Safe Earthing Electrode for connecting plurality of electrical connections with earthing electrode.

Statement of Drawings

Now the invention will be described in detail with reference to the drawings accompanying this specification.

Figure 1 shows in elevation the construction aspects of this novel-earthing electrode

Figure 2 shows in elevation the fixing and the installation aspects of this earthing electrode.

Detailed description of an embodiment of invention with reference to drawings accompanying the specification

Referring to the drawings, it is evident that the device namely novel safe earthing electrode according to this invention contains main parts namely main earthing electrode and outer shell of the earthing electrode.

Main earthing electrode has a base plate (1). The main earthing electrode is generally made of G.I pipe of 12 Swg with an outer diameter of 20 mm in case of type 19 and o.d of 40 mm in the case of type39. The length of the pipe is 2.0 mtr / 3.0 mtr. The pipe is flattened approx 50 mm at both ends and a round plate is welded at the bottom end and a hole is made of size 16 mm at the flattened end at the top of the electrode.

Outer shell of the main electrode is referred by numeral (2). This is also made of G.I pipe of 18 Swg with a diameter of 38 / 40 mm in each of the case of Type 19 and G.I pipe with a diameter of 76 / 80 mm in the case of Type 39. The length of the pipe is 50 mm less than that of the main earthing electrode pipe. The main electrode pipe is inserted in to it and the bottom plate is (1) welded. The inner pipe is denoted by numeral (3)

Initially the complete earthing electrode is subjected to hot dip galvanization and the dry film thickness of galvanization is approximately between 80 to 100 microns. A special type of compound (5) is pressure filled between the two pipes (2) and (3). A hole (8) is provided for connecting the electrodes with copper / G.I. Strip (Earth Wire).

It is to be noted that the dimension of the S.E.E may vary according to the client's requirements. Two accessories namely earthing electrode holder and G.I terminal plate are provided along with the earthing electrode.

The working of this electrode is as simple as any other electrode available in the market. The installations of this product are also very easy. Just dig a hole of required length and depth, place the earthing electrode and refill the dug up area with earth.

The unique feature of this innovation is the filling compound (5) which is a very good conductor of electricity (approx 95% 99%)and also a protector of the main earthing pipe from being corroded i.e. it works as a shield for the inner earthing pipe and hence making the effective thickness of the pipe approx 20 / 40 mm. A sealant (4) is provided at the top portion of safe earth electrode.

A hole (6) inside the inner pipe facilitates the filling of the compound inside the inner pipe. Another hole (7) on the periphery of the inner pipe at the top serves two purposes (a) at the time of galvanization the hole facilitate removal of excess galvanized material from the inner pipe, (b) it removes the air block if any from the inner pipe while filling the compound.

There are two holes (8) on the top flat surface of the inner pipe to facilitate fixing of copper strip / G.I strip to the electrode In the conventional earth electrodes, which are already available in the market, there is no such protection provided and the electrode pipes are eaten away by corrosion in a very short period of time.

In the novel SAFE EARTHING ELECTRODE, THE COMPOUND is anti corrosive as well a good conductor of electricity. Thus it gives for a very long period of time and reliable service. This is another important feature of this invention.

This special compound is produced, specifically for electrode (cathode) protection. This method of manufacture of the said compound is described in the following description.

First a carbon of highly desired characteristic is selected and then some of the other compounds (listed below) are mixed in certain proportion and under exacting control conditions. And after few tests to check the conductivity + corrosion effectiveness of the compound, this special compound is ready for use.

The materials used in the manufacture of this special compound are as follows:

1 . Graphite

2. Carbon Powder

3. 2.NaCl

4. 3.AgCl

5. 4.CaC03

6. 5.ZnS04

7. 6. Soft coke

8. 7. Phenol Formaldehyde

9. 8. Patricia

Salient features of the invention are in the provision of chemical compound in between main pipe and outer shell. This chemical compound has inherent properties of being corrosion resistant and possesses high conductivity.

These two properties are advantageously used in this novel earth electrode. This chemical compound enhances the longitivity of this earth electrode. It is to be noted that the con\ entional earth electrode gets corroded over a short period of time. The corroded portion will loose its effect of conductivity and non-corroded parts of the electrode will onl> conduct electricit} (which is not effective in longer period of time because of fluctuation in Ohmic value). The moisture content is one of the essential requirements for proper use of electrodes. If the conductivity portion of the electrodes does not have enough moisture content around practically the earth electrode ceases to function as an earth electrode.

This novel-earthing electrode overcomes this problem, which occurs in conventional earth electrodes. During the course of time of use of this novel electrode, outer shell pipe withers away. But the chemical compound will protect the main electrode (pipe) from corrosive atmosphere. Further the compound by itself has inherent properly to conduct electricity. Hence this novel contrivance gives 100% conducting environment with less fluctuation of Ohmic value.

The method of installation of this novel earth electrode is as follows: -

1 . Dig a hole by driving an auger of 6" / 8"dia, and 6.5 / 10 feet deep in the proposed place on the earth (which shall have high humidity in the normal course-clay soils are preferred), and insert the electrode by keeping it 4 inches above earth.

2. Simply keep the ELECTRODE in the hole and fill with the soil (9), which has been removed during digging. It is preferred to add salt and charcoal around the electrode (to make the soil low resistive) and also it should have high humidity for better results.

3. Consolidate the soil with hand and pour some water around the electrode

4. From the terminal provided on the top of the electrode, an appropriate Earth Copper Wire can be taken to the points wherever Earthing is required.

5. Caution: Hammering and drilling shall be strictly avoided which will damage the ELECTRODE. An installation aspect of the Safe Earthing Electrode is shown in figure 2. The earth electrode is placed in the soil to the depth of 2 ' 3 mts respectively. In order to protect the electrode, which is protruding above the ground the following precaution is taken. A masonry work (10) is constructed around electrode and covered on the top by a slab as shown in the illustration.

The excavated soil is refilled by adding some quantity of charcoal, salt, and chemicals to reduce the soil resistant around the electrode. A plate is attached to the terminal of the electrode to facilitate multiple connections to the electrode thereby; one safe earth electrode will facilitate the protection of multiple electric devices.

TRADITIONAL METHOD OF EARTHING SAFE EARTH ING ELECRODE

Only one G.I / C.I. pipe of a particular There are two pipes one inside the Diameter. other i.e. (PIPE IN PIPE TECHNOLOGY)

The Earthing Electrode is in direct The Earthing Electrode is NOT IN contact with the soil. DIRECT CONTACT WITH THE SOIL.

Absence of Corrosion. Long life.

Liable to fast corrosion and subsequently decay of the earthing pipe/plate is the end result.

Fluctuation of Ohmic value is least

Fluctuation of Ohmic value is more. (within safe limits) This result is frequent maintenance of gadgets/machines and danger of previous human life.

Surface area is more and the

Distribution of short circuit current is distribution time of short circuit less in terms of area, so it takes more current is least. time to pass on to the earth.

Galvanization is adequate i.e., 80-100

Galvanization is not adequate so microns/corrosion free. corrosion prone.

Practically no needs to change once

Needs to be changed in periodically. fitted i.e., fit and forget. Technical Details: -

The Earthing electrode is available for both HT / LT. For optimum results, the following dimension of components is necessary. Refer to fig 1 for Details.

Technical Details

Advantages of this invention:

• Revolution in earthing technology for Domestic / Industrial LT & HT earthing needs.

• Very simple Installation

• Corrosion proof, weather proof, water resistant, maintenance free, highly durable, "Fit and Forget Installation", and life saving and cost effective.

• Increases in life of the earthing electrode.

• Nullifies the corrosion.

It is to be noted that the invention is described in the specification with the aim of describing the salient features of the invention. It is further to be noted that the description is not to limit the scope of the invention. It is clear that within the scope of the invention various amendments and modifications are possible.

Claims

1. Safe Earthing Electrode comprises a specially shaped inner main electrode, and outer shell electrode surrounding the inner electrode, the said inner electrode and the outer electrode being separated by a space, the said space being filled with a special compound, the said compound is anti corrosive and having good conducting property and the terminal plate at the top of safe earth electrode for connecting the plurality of electrical connections with the earth electrode.

2. Safe Earthing Electrode as claimed in Claim 1 wherein each main electrode is a G.I pipe

3. Safe Earthing Electrode as claimed in Claim 1 wherein outer shell electrode is G.I pipe.

4. Safe Earthing Electrode as claimed in claim 1 wherein the said compound consist of Graphite, Carbon powder, NaCl. AgCl, CaCo₂, ZnSo₄, Soft coke. Phenol Formaldehyde and Patricia in the proportion such that the electrode gives the best anti corrosive character and good conducting property.

5. Safe earthing electrode as described in the specification and as described by the drawings accompanying the specifications.