The Right Manner To Stair Out Grounding Resistance

How to mensurate grounding resistance, amongst slowly together with Correct way?

Are the grounding systems that nosotros installed right ?, together with how to mensurate skillful together with right grounding?

Grounding is commonly installed to Protect an electrical installation from the danger of a lightning strike, But earlier nosotros verbalize over Grounding together with how skillful Grounding actually is, it's skillful to showtime know the dangers of lightning.

Do you lot know that Lightning has real large electrical energy? fifty-fifty at that spot is lightning that produces electricity reaching hundreds, thousands together with fifty-fifty millions of volts.

Is electricity amongst a voltage reaching hundreds, thousands together with fifty-fifty millions of volts dangerous?, together with how large is the electrical gamble from the lightning?

We simply imagine if nosotros are electrocuted inwards our homes, electricity that is inwards our homes solitary tin john campaign harm to humans together with tin john campaign fires.

Even though the electricity nosotros utilisation at dwelling line solid is nonetheless classified every bit electricity amongst a depression voltage of 220 volts.

Especially if struck past times lightning that produces electricity amongst a voltage of upwards to hundreds of thousands of volts !!
"220 Volt electricity tin john endanger safety, peculiarly Lightning amongst thousands of Volt electricity"

Lightning
Lightning is a natural phenomenon that oft occurs when it volition rain, lightning tin john campaign real large electrical energy, fifty-fifty reaching millions of volts.

The electrical unloose energy produced past times Lightning occurs because of the continuous motility of clouds which causes it to rub betwixt ii plates, both betwixt clouds together with clouds together with clouds, Each of the ii slitting plates has a unlike potential value.

There are clouds that bring a potential unloose energy that is positively charged together with some are negatively charged, spell the basis plate has a potential unloose energy that is negatively charged.

Lightning that has electrical unloose energy amongst a real large voltage, tin john live on grabbed inwards all directions together with fifty-fifty grabbed to the earth. Impact of lightning on electrical installations

Lightning strikes that atomic number 82 to the basis tin john live on related to diverse objects that be on earth, buildings, buildings, trees, electricity networks, together with others.

This lightning strike tin john live on divided into ii types, namely:
  • Direct lightning strike
  • Indirect lightning strike

A. Direct Lightning Strike
Direct lightning strikes are lightning strikes that straight hitting objects on earth, such every bit buildings, towers, houses, trees, electricity networks together with others, Direct electrical strikes bring a real large impact.

To forestall the danger from lead electrical strikes, Lightning Protection is commonly installed simply about the expanse or identify that you lot desire to protect from lead lightning strikes.

Lightning Protection
Protection organisation commonly used to forestall impairment to electrical networks together with equipment due to lead lightning strikes is lightning protection device.

Lightning rods volition have electrical voltage from lightning strikes together with drain the voltage to the basis (Earth) through grounding (Grounding).


B. Indirect Lightning Strike.
When at that spot is a lightning strike close our home, sometimes it tin john campaign impairment to diverse electrical devices or electronic devices such every bit televisions, computers, together with others.

Even though the lightning is non straight nigh our dwelling line solid or electrical equipment, Then how tin john the Indirect lightning strike campaign damage?

This is called an indirect lightning strike, the lightning strike is non nigh objects that are on earth, but the induced waves from electricity carried past times the lightning period of time through the cables inwards our line solid together with larn inwards at the electrical equipment nosotros have.

This electrical induction from lightning causes impairment to the electrical equipment.

And to avoid impairment to electrical equipment from these indirect lightning strikes, electrical installations together with electrical equipment must live on equipped amongst Surge Arrester.

Surge Arrester
Protection organisation commonly used to forestall impairment to networks together with electrical equipment due to indirect electricity (Induction) is past times installing Arrester (Surge Arrester) equipment.

Arrester functions to withdraw electrical voltage that exceeds normal limits together with volition drain the excess voltage to basis (Grounding).
How tin john lightning that has a large voltage live on neutralized?
The public is the best neutral system, together with tin john trim together with withdraw electrical voltage from the lightning strike.

Therefore, both Lightning Protection together with Surge Arrester volition non business office properly, if the grounding or grounding organisation is non installed properly together with correctly, How to gear upwards for sure that the grounding organisation are good?


The Correct Way to Measure Grounding resistance

Are the grounding systems that nosotros installed right  The Correct Way to Measure Grounding resistance
Grounding Tester

To larn a skillful grounding, the conductive cable implanted must live on genuinely connected to the earth.

To detect out whether the grounding organisation that nosotros installed is genuinely connected to the earth, that is, every bit much every bit possible nosotros must bring no resistance betwixt the grounding cable together with the earth.

But if it is non for sure 100% part is connected to the earth, together with then the maximum measure value is made from the resistance of grounding cable to the earth, which is below 2 ohms.
Grounding Resistence Value on public is <2 Ohm
How make nosotros know whether the resistance value or grounding resistance that nosotros bring installed has reached a measure value, thus that nosotros tin john country that the grounding organisation that nosotros installed is skillful together with correct.

To detect out this, nosotros must mensurate the grounding resistance that nosotros install past times using a grounding measuring instrument.

This measuring musical instrument is commonly called the Grounding Tester or public Tester.

Various types of types, brands together with models of grounding or earthenware sold inwards the market.
One of them nosotros tin john utilisation the Kyoritsu Grounding tester or public Tester amongst the 4102A model.

How make nosotros utilisation a grounding tester or basis tester to create upwards one's heed the status of the grounding organisation that nosotros installed?

Measurement of grounding resistance must live on done correctly to larn the right mensuration results.

How to utilisation public tester or grounding tester?

how to mensurate skillful grounding or grounding resistance
Grounding Measurement (Grounding)

This public tester or grounding tester is equipped amongst 3 (three) connective holes together with 3 (three) measuring cables to live on used.

The 3 cables are:
The cable is carmine (C), connected to the carmine connective hole on the measuring instrument, together with the other halt is connected to a stick / Fe stick that is available together with has been plugged into the basis / ground.

Try to dice on the distance betwixt the stick or Fe stick amongst i some other nigh 5m - 10m.

The yellowish cable (P), is connected to the yellowish connective hole on the measuring instrument, together with the other halt is connected to a stick / Fe stick that is available together with has been plugged into the basis / ground. Try to dice on the distance betwixt the stick or Fe stick amongst i some other nigh 5m - 10m.

Likewise, the distance betwixt each stick / Fe stick amongst the grounding signal or basis measured also must bring a distance betwixt 5m - 10m.

The cable is light-green (E), the cable is Green (E), connected to the Green connective hole on the measuring musical instrument (Earth Tester), together with the other halt is connected to the conductor cable at the Grounding signal that nosotros bring installed.

After that, plow the selector on the measuring musical instrument (Earth Tester) for us to aim at the mensuration amongst the highest value (scale 100 Ω) first, together with then press the exam button.
If the measuring needle has non moved or moved but is real small, plow the selector to modify the smaller scale unit of measurement (10 Ω).

If the measuring needle is nonetheless moving simply a niggling too, together with then nosotros tin john endeavour in i trial to a greater extent than amongst a smaller measuring scale (1 Ω), to larn to a greater extent than accurate mensuration results.

Calculate mensuration results:
If on a measuring scale of 1 Ω, the measuring needle moves inwards lay out 2, together with then the mensuration results are:
2 x 1 Ω = 2 Ω. (Good together with right grounding resistance every bit measure values)

If the measuring scale that nosotros utilisation inwards the selector choice is 10 Ω, together with the measuring needle moves to signal 2, together with then the mensuration results are:
2 x 10 Ω = xx Ω. (Grounding resistance is bad)


If the measuring scale nosotros utilisation inwards the selector choice 100 Ω, together with the movable measuring needle points to lay out 2, together with then the mensuration results are:
2 x 100 Ω = 200 Ω. (Grounding resistance are real bad, perchance non fifty-fifty installed)



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