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ANEXO IV
CALCULO DE SISTEMA DE PUESTA TIERRA
CALCULO DEL SISTEMA DE PUESTA A TIERRA
SISTEMA DE PUESTA A TIERRA (MALLA)
Metodo Dwight
1. Datos :
Resistividad del terreno (ρ) 600 Ohm-m
Profundidad (h) 0.70 m
Sección del conductor 70 mm2
Radio del conductor 0.00526 m
Distancia entre conductores 3 m
2. Formato de malla :
2.1. Horinzontal (X) : A = 18 m
n = 6 Und.
2.2. Vertical (Y) : B = 15 m
m = 7 Und.
3. Calculo de la resistencia horizontal (X) :
3.1. Cálculo de la resistencia de la malla :
Rs = 53.871 Ohm
3.2. Cálculo de las resistencias debidas a interferencias mutuas en los conductores :
E = 6.03
Ra = 8.703 Ohm
3.3. Resistencia del conductor :
Rc = 97.384 Ohm
3.3. Resistencia total del conductor :
Rcn = 16.231 Ohm
𝑅𝑠 =
𝜌
2𝜋𝐿
𝑥 𝐿𝑛
2𝐿
𝑟
+ 𝐿𝑛
𝐿
ℎ
+
2ℎ
𝐿
−
ℎ2
𝐿2
− 2
𝐸 = 𝑓. 𝑒. 𝑥𝐷
𝑅𝑎 =
𝜌
2𝜋𝐿
𝑥 𝐿𝑛
4𝐿
𝐸
+
𝐸
2𝐿
−
𝐸2
16𝑥𝐿2
− 1
𝑅𝑐 = 𝑅𝑠 + 𝑛 − 1 𝑥𝑅𝑎
𝑅𝑐𝑛 =
𝑅𝑐
𝑛
4. Calculo de la resistencia vertical (Y) :
4.1. Cálculo de la resistencia de la malla :
Rsu = 62.419 Ohm
4.2. Cálculo de las resistencias debidas a interferencias mutuas en los conductores :
E = 6.75
Rau = 8.895 Ohm
4.3. Calculo de la resistencia mutua (X & Y) :
Ram = 96.880 Ohm
4.3. Resistencia total del conductor :
Rcu = 159.299 Ohm
4.4. Resistencia total del conductor :
Rcm = 22.757 Ohm
5. Calculo de la resistencia total de la malla :
R = 9.474 Ohm
Si se considera aditivos para reducción del valor de la resistenica al 30%
R = 2.842 Ohm
Nota: La malla en el cálculo es teorica, se tendra que adaptar la geometrica de esta a la
cimentación del terreno
𝑅𝑠𝑢 =
𝜌
2𝜋𝐿
𝑥 𝐿𝑛
2𝐿
𝑟
+ 𝐿𝑛
𝐿
ℎ
+
2ℎ
𝐿
−
ℎ2
𝐿2
− 2
𝐸 = 𝑓. 𝑒. 𝑥𝐷
𝑅𝑎𝑢 =
𝜌
2𝜋𝐿
𝑥 𝐿𝑛
4𝐿
𝐸
+
𝐸
2𝐿
−
𝐸2
16𝑥𝐿2
− 1
𝑅𝑎𝑚 = 𝑚 − 1 𝑥𝑅𝑎𝑢 + 𝑛 − 1 𝑥𝑅𝑎
𝑅𝑐𝑢 = 𝑅𝑠𝑢 + 𝑅𝑎𝑚
𝑅𝑐𝑚 =
𝑅𝑐𝑢
𝑚
𝑅 =
𝑅𝑐𝑛 𝑥 𝑅𝑐𝑚
𝑅𝑐𝑛 + 𝑅𝑐𝑚

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Anexo iv calculo de sistema de puesta a tierra

  • 1. ANEXO IV CALCULO DE SISTEMA DE PUESTA TIERRA
  • 2. CALCULO DEL SISTEMA DE PUESTA A TIERRA SISTEMA DE PUESTA A TIERRA (MALLA) Metodo Dwight 1. Datos : Resistividad del terreno (ρ) 600 Ohm-m Profundidad (h) 0.70 m Sección del conductor 70 mm2 Radio del conductor 0.00526 m Distancia entre conductores 3 m 2. Formato de malla : 2.1. Horinzontal (X) : A = 18 m n = 6 Und. 2.2. Vertical (Y) : B = 15 m m = 7 Und. 3. Calculo de la resistencia horizontal (X) : 3.1. Cálculo de la resistencia de la malla : Rs = 53.871 Ohm 3.2. Cálculo de las resistencias debidas a interferencias mutuas en los conductores : E = 6.03 Ra = 8.703 Ohm 3.3. Resistencia del conductor : Rc = 97.384 Ohm 3.3. Resistencia total del conductor : Rcn = 16.231 Ohm 𝑅𝑠 = 𝜌 2𝜋𝐿 𝑥 𝐿𝑛 2𝐿 𝑟 + 𝐿𝑛 𝐿 ℎ + 2ℎ 𝐿 − ℎ2 𝐿2 − 2 𝐸 = 𝑓. 𝑒. 𝑥𝐷 𝑅𝑎 = 𝜌 2𝜋𝐿 𝑥 𝐿𝑛 4𝐿 𝐸 + 𝐸 2𝐿 − 𝐸2 16𝑥𝐿2 − 1 𝑅𝑐 = 𝑅𝑠 + 𝑛 − 1 𝑥𝑅𝑎 𝑅𝑐𝑛 = 𝑅𝑐 𝑛
  • 3. 4. Calculo de la resistencia vertical (Y) : 4.1. Cálculo de la resistencia de la malla : Rsu = 62.419 Ohm 4.2. Cálculo de las resistencias debidas a interferencias mutuas en los conductores : E = 6.75 Rau = 8.895 Ohm 4.3. Calculo de la resistencia mutua (X & Y) : Ram = 96.880 Ohm 4.3. Resistencia total del conductor : Rcu = 159.299 Ohm 4.4. Resistencia total del conductor : Rcm = 22.757 Ohm 5. Calculo de la resistencia total de la malla : R = 9.474 Ohm Si se considera aditivos para reducción del valor de la resistenica al 30% R = 2.842 Ohm Nota: La malla en el cálculo es teorica, se tendra que adaptar la geometrica de esta a la cimentación del terreno 𝑅𝑠𝑢 = 𝜌 2𝜋𝐿 𝑥 𝐿𝑛 2𝐿 𝑟 + 𝐿𝑛 𝐿 ℎ + 2ℎ 𝐿 − ℎ2 𝐿2 − 2 𝐸 = 𝑓. 𝑒. 𝑥𝐷 𝑅𝑎𝑢 = 𝜌 2𝜋𝐿 𝑥 𝐿𝑛 4𝐿 𝐸 + 𝐸 2𝐿 − 𝐸2 16𝑥𝐿2 − 1 𝑅𝑎𝑚 = 𝑚 − 1 𝑥𝑅𝑎𝑢 + 𝑛 − 1 𝑥𝑅𝑎 𝑅𝑐𝑢 = 𝑅𝑠𝑢 + 𝑅𝑎𝑚 𝑅𝑐𝑚 = 𝑅𝑐𝑢 𝑚 𝑅 = 𝑅𝑐𝑛 𝑥 𝑅𝑐𝑚 𝑅𝑐𝑛 + 𝑅𝑐𝑚