Different methods of testing earth wells:
Earth well is one of the most basic items for maintaining and safety of places and people that is used in buildings and facilities.Earthing system And wells, similar protection systems Earthing of sensitive electronic systems Are to avoid potential hazards and prevent accidents caused by Lightning Or electric shock due to equipment short circuit error. To test and how to run the ground well and ensure the health of its performance, test the ground well by Earth meter Standard and reliable are essential.
Earth well testing is done in several ways. In this article, we have tried to explain about earth well testing with different methods. To test the ground well, accurate measuring equipment is required, which allows a more accurate execution of the ground well test.
Test ground wells using Isolated transformer, Voltmeter and ammeter
In this well test method, the measuring rods are then placed in the ground Ampere meter Connect the transformer with the secondary end and connect one free end of the transformer to the ground of the earth well, then connect one of the two ends of the ammeter to the last rod and one end. Voltmeter Connect the earth to the wire of the well and the other end to the first rod, then connect the first end of the insulated transformer to 220 volts and divide the amount of volts obtained by the number of ammeters. The value obtained is the resistance of the earth well.
Earth well test with Earth Tester:
In this method, using 3 rods, by connecting one of the rods to the copper wire of the earth well, then the other 2 rods are hammered at intervals of 10 and 20 meters after the earth well, and finally the ground resistance by the earth tester. (Three wires) will be measured. but if Earth Tester You can not test your ground well with a miniature fuse of 10 amps by connecting one end of the fuse to 220 volts, then activating the fuse (ON) and connecting the other end of the fuse to the ground well if the fuse The earth well has a standard resistance.
As mentioned above, ground well testing can be done in several ways, but there are simpler methods for testing wells. In general, the resistance of earth wells is the most important factor for testing wells.
In some cases where it is not possible to pound the electrode or there is no space for wiring and pounding the rods, if there is a large buried water piping system or null wire near the ground rod, it is easy and without pounding the electrode. The resistance of the earth system can be obtained with a high approximation. The method is that a wire from the ground well is connected to the earth tester and a wire is connected to the device from zero or wide earth and the device is placed in two pins and the earth test is performed.
What is a well?
Earth well in the sense means land, which is also called Ground connection systemIs.
What is the function of a well?
The job of the earth well is to connect and transmit additional electrical current to the ground, which is mostly done to prevent electric shock. In other words, by connecting all industrial, telecommunication and home electrical devices and… with a connection wire to well one Earthing system We have created. As mentioned, the purpose of implementing an earthing system is to prevent leakage of electrical current and electrical circuits and to prevent electric shock, which is an important and necessary issue in the electricity industry.
Significant care must be taken in connecting the electric well to the ground when the phase wires are fully connected to the ground wire. The fuse operates and cuts off the current.Arting It has a life-saving fuse (FI), this fuse cuts off the current leakage from 30 mA and causes the phase and zero current to be completely cut off.
It should be noted that ground wire and neutral wire are very similar in some respects, but in practice, two wires are independent of each other and have different functions from each other, and one can never be used instead of the other.
Earthing systemIt is very important today. As in telecommunications to Very sensitive and accurate earthing systemsIt is needed to prevent noise in the network and also has many applications in electricity transmission and distribution networks; Wireless surge arresters are virtually useless.
Types of earth wells
- Deep earth well
- Surface earth well
Deep earth well
Normally a well is drilled with great depth andEarthing systemWill be implemented. Of course, in this method, it should be possible to drill wells with great depths around the site.
Surface earth well
It is used in surface earth wells when we can not drill wells at great depths and can usually be done up to a depth of 80 cm.
– Conditions for using surface earth wells and its operation method in terms of location to places that:
– There should be a minimum of space around the site so that it is possible to run a surface earth well.
– In terms of altitude should be lower than sea level.
– The area around the site should have low elevations.
– There is almost a large distance between the rig and the site
Although the surface well method has advantages, the implementation of earth to the following methods is more preferable: