The calculation of the amount of the grounding module, and the basis of the grounding module as the

According to the soil resistivity of the soil layer of the ground grid, the following formula is used to calculate the amount of grounding module:

Horizontally embedded, single module ground resistance:

rj = total ground resistance after paralleling: rnj = rj n where: soil resistivity (m).

a, b length and width of the grounding module (m);

rj Single module ground resistance ( ).

RNJ Total Ground Resistance ( ).

n Number of grounding modules;

Module adjustment factor, generally taken.

The economic dosage of the grounding module should depend on different soil quality, the laying thickness on the grounding body should be between 8-625px, according to the soil resistivity of the soil layer of the ground grid, the following formula is used to calculate the amount of grounding module (take AG M1 as an example):

Horizontally embedded, single module ground resistance:

rj?= Total ground resistance after parallel connection: rnj?=?rj?n where: —soil resistivity (m).

a, b length and width of the grounding module (m);

rj Single module ground resistance ( ).

RNJ Total Ground Resistance ( ).

n Number of grounding modules;

Module adjustment factor, generally taken.

The specific amount of grounding module can not give an accurate number, because each manufacturer produces different product resistance, so it can not be accurately determined, only you go to the specific manufacturer to consult.

According to the soil resistivity of the ground grid site, the following formula is used to calculate the amount of grounding module:

Single Ground Module Resistance: r=

Total ground resistance after parallel connection: rm=r nη

Soil resistivitym

r Single ground module resistor

rn ground resistance

Number of grounding modules.

Module adjustment factor.

Number of modules: 4 6 10 20 40 60 100 adjustment factor.

Compute instances. The calculation method of the grounding resistance with the grounding module as the grounding body is as follows:

Single Ground Module Ground Resistance: r=

Ground resistance after parallel connection: rm=r nη

The soil resistivity is 300 m n: the number of grounding modules is 20:

The adjustment factor of the module is taken as 0 65 Calculation result: rm=3 65 Note: Due to the uneven soil resistivity, the different design schemes, the use of auxiliary grounding materials and the influence of construction quality, the above calculation is only a theoretical calculation, and the actual effect may deviate from the theoretical value!

Conductive resistance, conductive resistance in series or parallel.

During lightning protection and grounding construction, quickly determine the number of vertical ground poles.