ÁREA DE
ÁREA DE ELECTROMECÁNICA INDUSTRIAL
ELECTROMECÁNICA INDUSTRIAL
PROGRAMA ACADÉMICO
PROGRAMA ACADÉMICO
DE MANTENIMIENTO INDUSTRIAL
DE MANTENIMIENTO INDUSTRIAL
IMPLEMENTACION DE MANTENIMIENTO PREVENTIVO
IMPLEMENTACION DE MANTENIMIENTO PREVENTIVO
Y PUESTA A TIERRA EN MÁQUINAS
Y PUESTA A TIERRA EN MÁQUINAS
PARA LA EMPRESA:
PARA LA EMPRESA:
CABORCA
CABORCA
MRMRPresenta:
Presenta:
José Efraín Martínez Abundiz
José Efraín Martínez Abundiz
PARA OBTENER EL TÍTULO DE
PARA OBTENER EL TÍTULO DE TÉCNICO SUPERIOR
TÉCNICO SUPERIOR
UNIVERSITARIO EN MANTENIMIENTO INDUSTRIAL
UNIVERSITARIO EN MANTENIMIENTO INDUSTRIAL
GENERACIÓN: 2009-2011 GENERACIÓN: 2009-2011 León, Guanajuato. Agosto 2011 León, Guanajuato. Agosto 2011
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ÁREA DE
ÁREA DE ELECTROMECÁNICA INDUSTRIAL
ELECTROMECÁNICA INDUSTRIAL
PROGRAMA ACADÉMICO
PROGRAMA ACADÉMICO
DE MANTENIMIENTO INDUSTRIAL
DE MANTENIMIENTO INDUSTRIAL
IMPLEMENTACION DE MANTENIMIENTO PREVENTIVO
IMPLEMENTACION DE MANTENIMIENTO PREVENTIVO
Y PUESTA A TIERRA EN MAQUINAS
Y PUESTA A TIERRA EN MAQUINAS
PARA LA EMPRESA:
PARA LA EMPRESA:
Presenta:
Presenta:
José Efraín Martínez Abundiz
José Efraín Martínez Abundiz
PARA OBTENER EL TÍTULO DE
PARA OBTENER EL TÍTULO DE TÉCNICO SUPERIOR
TÉCNICO SUPERIOR
UNIVERSITARIO EN MANTENIMIENTO INDUSTRIAL
UNIVERSITARIO EN MANTENIMIENTO INDUSTRIAL
ASESOR ACADÉMICO:
ASESOR ACADÉMICO: Ing. Víctor Manuel Martínez Rivas
Ing. Víctor Manuel Martínez Rivas
ASESOR ORGANIZACIONAL:
ASESOR ORGANIZACIONAL: Ambrosio Becerra Mandujano
Ambrosio Becerra Mandujano
GENERACIÓN: 2009-2011 GENERACIÓN: 2009-2011 León, Guanajuato. Agosto 2011 León, Guanajuato. Agosto 2011
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RESUMEN
RESUMEN
La medida de seguridad llamada puesta a tierra es indispensables en la La medida de seguridad llamada puesta a tierra es indispensables en la maquinaria principalmente con sistema eléctrico, ya que si no se cuenta con ella maquinaria principalmente con sistema eléctrico, ya que si no se cuenta con ella en caso de una descarga se pueden dañar los activos fijos de la empresa el en caso de una descarga se pueden dañar los activos fijos de la empresa el personal de la misma ocasionando perdidas masivas ya que se corre el riesgo personal de la misma ocasionando perdidas masivas ya que se corre el riesgo de un incendio .
de un incendio .
Se conectaron la mayoría de las maquinas a tierra obteniendo buenos Se conectaron la mayoría de las maquinas a tierra obteniendo buenos resultados.
resultados.
Un plan de mantenimiento preventivo es de gran importancia tenerlo Un plan de mantenimiento preventivo es de gran importancia tenerlo dentro de la empresa ya que con él se pueden prevenir paros no previstos dentro de la empresa ya que con él se pueden prevenir paros no previstos dentro de la empresa y se alarga más la vida útil de la maquinaria.
dentro de la empresa y se alarga más la vida útil de la maquinaria.
Se actualizo el plan de mantenimiento con el que contaba la empresa y Se actualizo el plan de mantenimiento con el que contaba la empresa y se le dio seguimiento.
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AGRADECIMIENTOS
AGRADECIMIENTOS
Quiero agradecer a los técnicos Ambrosio Becerra y Armando Morales por su Quiero agradecer a los técnicos Ambrosio Becerra y Armando Morales por su apoyo dentro de la fábrica y al aprendizaje que me brindaron dentro de mi apoyo dentro de la fábrica y al aprendizaje que me brindaron dentro de mi estancia en la empresa CABORCA.
estancia en la empresa CABORCA.
También quiero agradecer a mi asesor académico
También quiero agradecer a mi asesor académico Víctor Manuel MartínezVíctor Manuel Martínez Rivas
Rivas por su apoyo y su asesoría a lo largo de mi estancia en la Universidadpor su apoyo y su asesoría a lo largo de mi estancia en la Universidad Tecnológica de León
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ÍNDICE
ÍNDICE
INTRODUCCIÓN INTRODUCCIÓN... 1... 1 1. ANTECEDENTES 1. ANTECEDENTES... 3... 3 2. PROBLEMÁTICA 2. PROBLEMÁTICA... 8... 8 3. JUSTIFICACIÓN 3. JUSTIFICACIÓN... 9... 9 4. OBJETIVOS 4. OBJETIVOS... 10... 10 4.14.1 Objetivo Objetivo general...general... 10... 10 4.2 Objetivos
4.2 Objetivos específicos en específicos en puesta a puesta a tierra. tierra. ... 10... 10 4.3
4.3 Herramientas Herramientas y y material. material. ... 10... 10 4.4 Objetivos específicos en
4.4 Objetivos específicos en plan de mantenimiento preventivo. ... 11plan de mantenimiento preventivo. ... 11 4.5
4.5 ALCANCE ALCANCE ... ... 1111 5. Metodología
5. Metodología... 12... 12
5.1 Identificar maquinaria con sistema eléctrico y separarlos de las que 5.1 Identificar maquinaria con sistema eléctrico y separarlos de las que funcionan mecánicamente.
funcionan mecánicamente... ... 1212 5.2 Identificar
5.2 Identificar el voltaje el voltaje que trabajanque trabajan. . ... 13... 13 5.3 Tomar
5.3 Tomar mediciones para mediciones para comprobar el comprobar el voltaje. voltaje. ... 14... 14 5.4 Separar maquinaria que cuente con la puesta a tierra ya instalada, de la 5.4 Separar maquinaria que cuente con la puesta a tierra ya instalada, de la que todavía
que todavía no no la tiene. ...la tiene. ... 15... 15 5.5 Comprobar que la maquinaria que no tiene la puesta a tierra tenga en 5.5 Comprobar que la maquinaria que no tiene la puesta a tierra tenga en tornillo para la conexión a puesta a tierra o el orificio para el tornillo y en su tornillo para la conexión a puesta a tierra o el orificio para el tornillo y en su defecto diseñarle y hacer adaptaciones para proceder a hacer la puesta a defecto diseñarle y hacer adaptaciones para proceder a hacer la puesta a tierra.
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5.7 Hacer la conexión a tierra tomando la tierra general ya instalada en la 5.7 Hacer la conexión a tierra tomando la tierra general ya instalada en la empresa. ...
empresa. ... ... 1818 5.9
5.9 Identificar toda Identificar toda la mala maquinaria quinaria ... 19... 19 5.10
5.10 Revisar historial Revisar historial de de la maquinala maquinaria ria ... 19... 19 5.11 Hacer
5.11 Hacer un cheun chequeo ...queo ... 20.. 20 5.12
5.12 Determinar componentes Determinar componentes ... 21... 21 5.13 Determinar
5.13 Determinar posibles fallas posibles fallas ... 22... 22 5.14
5.14 Revisar aRevisar antecedentes ntecedentes de de fallas fallas ... 22... 22 5.15 Limpieza
5.15 Limpieza interna y lubinterna y lubricación ...ricación ... 23... 23 6. Resultados 6. Resultados... 24... 24 7. Conclusiones 7. Conclusiones... 25... 25 8. Agregados 8. Agregados... 27... 27 9. REFERENCIAS 9. REFERENCIAS... 26... 26
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INTRODUCCIÓN
INTRODUCCIÓN
Como lo dice Rogelio García Márquez (2001) la puesta a tierra es una de Como lo dice Rogelio García Márquez (2001) la puesta a tierra es una de las medidas de seguridad incluidas en la categoría B. Suele estar acompañada las medidas de seguridad incluidas en la categoría B. Suele estar acompañada de otras medidas (relés, diferenciales, etc.) que garanticen un alto nivel de de otras medidas (relés, diferenciales, etc.) que garanticen un alto nivel de seguridad en las instalaciones.
seguridad en las instalaciones.
La puesta a tierra se basa en la propiedad de que las cargas eléctricas La puesta a tierra se basa en la propiedad de que las cargas eléctricas (electrones) siempre intentarán alcanzar valores energéticos mínimos para (electrones) siempre intentarán alcanzar valores energéticos mínimos para estar en equilibrio. La tierra es el punto de potencial cero, masa o energía estar en equilibrio. La tierra es el punto de potencial cero, masa o energía mínima que mejor se adapta a los requisitos de las instalaciones eléctricas, mínima que mejor se adapta a los requisitos de las instalaciones eléctricas, siendo utilizada como tensión de referencia o tensión neutra.
siendo utilizada como tensión de referencia o tensión neutra.
Dentro de este Informe de Estadía se redactan pasos a seguir para hacer Dentro de este Informe de Estadía se redactan pasos a seguir para hacer una conexión a
una conexión a tierra pritierra principalmente en ncipalmente en maquinaria de maquinaria de calzado, calzado, la cual la cual sese utiliza dentro de la empresa CABORCA; son pasos detallados que abarcan utiliza dentro de la empresa CABORCA; son pasos detallados que abarcan principalmente desde el
principalmente desde el análisis de la análisis de la maquinaria, maquinaria, la clasificación la clasificación de la misde la mismama hasta hacer la conexión para aterrizarlas a tierra.
hasta hacer la conexión para aterrizarlas a tierra. Como lo dice Luis
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Otro de los puntos que abarca este reporte es el plan de un Otro de los puntos que abarca este reporte es el plan de un mantenimiento preventiv
mantenimiento preventivo, o, el cual el cual fue modificado fue modificado en algunas en algunas de sus de sus partespartes porque con el que contaba la empresa no estaba actualizado y no tenía porque con el que contaba la empresa no estaba actualizado y no tenía seguimiento. Dentro del informe se tocan puntos clave para poder hacer un plan seguimiento. Dentro del informe se tocan puntos clave para poder hacer un plan de mantenimiento preventivo el cual es de gran importancia para tener en de mantenimiento preventivo el cual es de gran importancia para tener en buenas condiciones y para prevenir posibles fallas dentro de la maquinaria y buenas condiciones y para prevenir posibles fallas dentro de la maquinaria y esto provoque paros en la producción.
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1. ANTECEDENTES
1. ANTECEDENTES
En el año de 1978, el Sr. Luis Torres Muñoz, con una larga experiencia En el año de 1978, el Sr. Luis Torres Muñoz, con una larga experiencia en la venta de zapato en varias zonas del país, decide fundar una pequeña en la venta de zapato en varias zonas del país, decide fundar una pequeña fábrica de botas, cuyos productos añadiría a los que ya vendía regularmente. fábrica de botas, cuyos productos añadiría a los que ya vendía regularmente. En el mes de abril inicia la producción en un local de 200 m
En el mes de abril inicia la producción en un local de 200 m22 en la calle deen la calle de Guillermo Prieto, en la ciudad de León, Guanajuato.
Guillermo Prieto, en la ciudad de León, Guanajuato.
La empresa empezó a operar con seis trabajadores, para fabricar entre La empresa empezó a operar con seis trabajadores, para fabricar entre seis y ocho pares diarios. Conociendo la ciudad de
seis y ocho pares diarios. Conociendo la ciudad de CABORCACABORCA del Estado dedel Estado de
Sonora, y apreciando su belleza y ambiente del viejo Oeste, Don Luis decide Sonora, y apreciando su belleza y ambiente del viejo Oeste, Don Luis decide adoptar ese nombre para el negocio. En agosto de ese año, su hijo mayor, Luis adoptar ese nombre para el negocio. En agosto de ese año, su hijo mayor, Luis Torres Díaz, se integra al trabajo como responsable del negocio, mientras su Torres Díaz, se integra al trabajo como responsable del negocio, mientras su padre viaja en su habitual labor de ventas.
padre viaja en su habitual labor de ventas.
El cuidado puesto en el trabajo, así como el servicio esmerado que El cuidado puesto en el trabajo, así como el servicio esmerado que ofrecía Don Luis a sus clientes, logran que la demanda de botas fabricadas por ofrecía Don Luis a sus clientes, logran que la demanda de botas fabricadas por la joven empresa crezca aceleradamente, y en 1981 se tienen que cambiar a un la joven empresa crezca aceleradamente, y en 1981 se tienen que cambiar a un local de 400 m
local de 400 m22 en la calle de en la calle de 5 de febrero, q5 de febrero, que aloja a 34 trabajadores. ue aloja a 34 trabajadores. ParaPara entonces, el menor de sus hijos varones, al que familiarmente llamaban entonces, el menor de sus hijos varones, al que familiarmente llamaban Chemel, se había integrado a la empresa como vendedor y su hijo Luis se Chemel, se había integrado a la empresa como vendedor y su hijo Luis se
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una camioneta y contrata a más agentes de ventas. El personal ha crecido a 80 una camioneta y contrata a más agentes de ventas. El personal ha crecido a 80 trabajadores.
trabajadores.
Un año después la empresa adquiere un local en la calle Allende para Un año después la empresa adquiere un local en la calle Allende para hacer el corte y realiza el acabado en las instalaciones de
hacer el corte y realiza el acabado en las instalaciones de CABORCACABORCA mientrasmientras
que en el local de 5 de febrero produce zapato Bond. En el curso de los dos que en el local de 5 de febrero produce zapato Bond. En el curso de los dos años siguientes comienza la venta de botas a la empresa Tony Lama de los años siguientes comienza la venta de botas a la empresa Tony Lama de los Estados Unidos en la modalidad de maquila y se abre a la empresa el mercado Estados Unidos en la modalidad de maquila y se abre a la empresa el mercado francés.
francés. Botas
Botas CABORCACABORCA sigue creciendo y perfeccionándose en el conocimientosigue creciendo y perfeccionándose en el conocimiento
de fabricación de la bota. En 1986 se añade la maquila de 300 pares al día para de fabricación de la bota. En 1986 se añade la maquila de 300 pares al día para Botas Fox y se inicia la venta a Go West. La empresa decide abordar el Botas Fox y se inicia la venta a Go West. La empresa decide abordar el mercado de Italia. Para atender los nuevos mercados requiere contratar a un mercado de Italia. Para atender los nuevos mercados requiere contratar a un especialista en Logística de exportación.
especialista en Logística de exportación.
En 1988 la falta de espacio exige unir a la empresa en un solo lugar y se En 1988 la falta de espacio exige unir a la empresa en un solo lugar y se muda a la Av. Industriales del Fraccionamiento Julián de Obregón. En el muda a la Av. Industriales del Fraccionamiento Julián de Obregón. En el decenio de los años 90 llega a producir 2000 pares diarios y poco después se decenio de los años 90 llega a producir 2000 pares diarios y poco después se emprende el cambio hacia la producción de un menor número de pares pero de emprende el cambio hacia la producción de un menor número de pares pero de diseño y construcción mucho más refinados e inicia la maquila para grandes diseño y construcción mucho más refinados e inicia la maquila para grandes
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En la actualidad cuenta con más de 312 colaboradores y se consideran En la actualidad cuenta con más de 312 colaboradores y se consideran expectativas de crecimiento.
expectativas de crecimiento.
Misión
Misión
Fabricar la mejor bota báquira para hombre y mujer mediante la Fabricar la mejor bota báquira para hombre y mujer mediante la innovación de los diseños, la calidad de nuestros productos, la utilización de los innovación de los diseños, la calidad de nuestros productos, la utilización de los recursos y la mejor mano de obra cualificada teniendo siempre presente la recursos y la mejor mano de obra cualificada teniendo siempre presente la satisfacción de nuestros clientes y del mercado en general, valorizando la satisfacción de nuestros clientes y del mercado en general, valorizando la Empresa a través del desarrollo integral de nuestra gente en armonía con la Empresa a través del desarrollo integral de nuestra gente en armonía con la sociedad y el medio ambiente, para garantizar un crecimiento continuo y sociedad y el medio ambiente, para garantizar un crecimiento continuo y rentable.
rentable.
Visión
Visión
Ser una de las mejores empresas de calzado y estar posicionados en la Ser una de las mejores empresas de calzado y estar posicionados en la mente de nuestros clientes como la mejor en calidad y diseños, Abrir nuevos mente de nuestros clientes como la mejor en calidad y diseños, Abrir nuevos mercados y obtener cada vez una mayor participación en estos
mercados y obtener cada vez una mayor participación en estos..
Valores
Valores
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Compromiso: Tener en cuenta que se deben de hacer bien lasCompromiso: Tener en cuenta que se deben de hacer bien las
cosas por la responsabilidad con otras marcas cosas por la responsabilidad con otras marcas
Trabajo en equipo: Tener la capacidad de colaborar con losTrabajo en equipo: Tener la capacidad de colaborar con los
compañeros y llevar un trabajo mas ameno dentro de la compañeros y llevar un trabajo mas ameno dentro de la empresa y olvidarse de peleas o conflictos internos o externos a empresa y olvidarse de peleas o conflictos internos o externos a al misma.
al misma.
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Disposición al cambio: Tener maleabilidad para operar conDisposición al cambio: Tener maleabilidad para operar con
nueva maquinaria u operar con software mas sofisticados. nueva maquinaria u operar con software mas sofisticados.
Respeto: No ofender por ningún motivo a un compañero deRespeto: No ofender por ningún motivo a un compañero de
trabajo para tener una mejor comunicación. trabajo para tener una mejor comunicación.
Creatividad: Hacer innovaciones a tu trabajo ya sea paraCreatividad: Hacer innovaciones a tu trabajo ya sea para
ahorrar tiempo en alguna tarea o para tener una mejor ahorrar tiempo en alguna tarea o para tener una mejor producción sin pasar por alto los lineamientos de seguridad producción sin pasar por alto los lineamientos de seguridad marcados para el trabajo de la maquinaria
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2. PROBLEMÁTICA
2. PROBLEMÁTICA
CABORCA actualmente cuenta con maquinaria con sistema hidráulico, CABORCA actualmente cuenta con maquinaria con sistema hidráulico, mecánico y eléctrico. La mayor parte de las máquinas con sistema eléctrico no mecánico y eléctrico. La mayor parte de las máquinas con sistema eléctrico no cuentan con la norma
cuentan con la norma de seguridad de seguridad 001 y 022 de las nor001 y 022 de las normas mexicanas que semas mexicanas que se encargan principalmente de los sistemas eléctricos y de la puesta a tierra.
encargan principalmente de los sistemas eléctricos y de la puesta a tierra.
CABORCA cuenta con un plan de mantenimiento preventivo el cual no CABORCA cuenta con un plan de mantenimiento preventivo el cual no esta actualizado y
esta actualizado y no tiene un no tiene un seguimiento lo cual seguimiento lo cual a provocado paros dentro dea provocado paros dentro de la producción.
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3. JUSTIFICACIÓN
3. JUSTIFICACIÓN
Es importante tener las máquinas conectadas a tierra y dentro de los Es importante tener las máquinas conectadas a tierra y dentro de los rangos estipulados por la norma mexicana que es de 25 ohm para la rangos estipulados por la norma mexicana que es de 25 ohm para la maquinaria ya
maquinaria ya que se que se pueden prevenir multas pueden prevenir multas así como accidentasí como accidentes para loses para los operadores para la maquina o para la empresa ya que si ocurre un algún corto operadores para la maquina o para la empresa ya que si ocurre un algún corto los circuitos
los circuitos eléctricos pueden eléctricos pueden producir chispas producir chispas y como y como en la en la empresa seempresa se trabaja también con cartón puede provocar algún incendio dentro de la empresa trabaja también con cartón puede provocar algún incendio dentro de la empresa poniendo en riesgo a todo el personal.
poniendo en riesgo a todo el personal.
Es importante tener un plan de mantenimiento preventivo actualizado y Es importante tener un plan de mantenimiento preventivo actualizado y darle una secuencia paro lograr tener menos paros en la producción prolongar darle una secuencia paro lograr tener menos paros en la producción prolongar el tiempo de vida útil de la maquinaria con la que se esta trabajando. Y por el tiempo de vida útil de la maquinaria con la que se esta trabajando. Y por consiguiente tener mayor
consiguiente tener mayor seguridad con la seguridad con la maquina ya que siemaquina ya que siempre va a mpre va a estarestar en buen estado.
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4. OBJETIVOS
4. OBJETIVOS
4.1 OBJETIVO GENERAL. 4.1 OBJETIVO GENERAL.
Realizar puesta a tierra y un plan de mantenimiento preventivo con los Realizar puesta a tierra y un plan de mantenimiento preventivo con los lineamientos estipulados en la normas de seguridad para no tener daños tanto lineamientos estipulados en la normas de seguridad para no tener daños tanto en la maquinaria
en la maquinaria y en el operady en el operador, en la empresa or, en la empresa Botas Caborca, durante Botas Caborca, durante elel periodo mayo - agosto de 2011.
periodo mayo - agosto de 2011.
4.2
4.2
OBJETIVOS METODOLÓGICOSOBJETIVOS METODOLÓGICOS
Identificar maquinaria con sistema eléctrico y separarlos de las queIdentificar maquinaria con sistema eléctrico y separarlos de las que
funcionan mecánicamente funcionan mecánicamente
Identificar el voltaje que trabajanIdentificar el voltaje que trabajan
Tomar mediciones para comprobar el voltajeTomar mediciones para comprobar el voltaje
Separar maquinaria que cuente con la puesta a tierra ya instalada, de laSeparar maquinaria que cuente con la puesta a tierra ya instalada, de la
que todavía no la tiene. que todavía no la tiene.
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Desarmador; para quitar tornillos especialmente cabeza de gotaDesarmador; para quitar tornillos especialmente cabeza de gota
Flexo metro; para delimitar longitudesFlexo metro; para delimitar longitudes
4.4
4.4
Objetivos específicos en plan de Objetivos específicos en plan de mantenimiento preventivomantenimiento preventivo..
Identificar toda la maquinariaIdentificar toda la maquinaria
Revisar historial de la maquinariaRevisar historial de la maquinaria
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55.. METODOLOGÍA
METODOLOGÍA
Es de gran importancia una metodología ya que en ella podemos Es de gran importancia una metodología ya que en ella podemos encontrar pasos a seguir para desarrollar los objetivos generales, ya que estos encontrar pasos a seguir para desarrollar los objetivos generales, ya que estos solo proporcionan una definición mínima de los pasos a seguir para desarrollar solo proporcionan una definición mínima de los pasos a seguir para desarrollar una actividad es mas eficiente y los pasos son mas claros.
una actividad es mas eficiente y los pasos son mas claros.
I. En puesta a tierra
I. En puesta a tierra
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5.2 Identificar el voltaje que trabajan. 5.2 Identificar el voltaje que trabajan.
El voltaje con el que trabajan fue identificado con las placas que El voltaje con el que trabajan fue identificado con las placas que contienen información de las máquinas esas placas se encuentran a un lado de contienen información de las máquinas esas placas se encuentran a un lado de la máquina o por detrás.
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5.3 Tomar mediciones para c
5.3 Tomar mediciones para comprobar el voltaje.omprobar el voltaje. Se tomaron las medici
Se tomaron las mediciones con el multímetro ones con el multímetro para comprobar que lpara comprobar que lo queo que decía la placa era lo correcto.
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5.4 Separar maquinaria que cuente con la puesta a tierra ya instalada, de 5.4 Separar maquinaria que cuente con la puesta a tierra ya instalada, de la que todavía no la tiene.
la que todavía no la tiene.
La maquinara se separó observando con detenimiento la instalación La maquinara se separó observando con detenimiento la instalación eléctrica y se separó con un
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5.5 Comprobar que la maquinaria que no tiene la puesta a tierra tenga en 5.5 Comprobar que la maquinaria que no tiene la puesta a tierra tenga en tornillo para la conexión a puesta a tierra o el orificio para el tornillo y en tornillo para la conexión a puesta a tierra o el orificio para el tornillo y en
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5.6 Tomar mediciones con el flexo metro para cortar el cable a la medida 5.6 Tomar mediciones con el flexo metro para cortar el cable a la medida requerida
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5.7 Hacer la conexión a tierra tomando la tierra general ya instalada en la 5.7 Hacer la conexión a tierra tomando la tierra general ya instalada en la
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II. En plan de mantenimiento
II. En plan de mantenimiento
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