UD10. MONTAJE Y MANTENIMIENTO DE CELDAS DE A.T.
UD10. MONTAJE Y MANTENIMIENTO DE CELDAS DE A.T. Resultados de aprendia!e"
Criterios de evaluación
( Se /an re&ono&ido los reuisitos de se-uridad para operar so(re los di%erentes euipos.
#. $lani%i&a el 'anteni'iento de c) Se ha secuenciado las actuaciones en los sistemas, equipos e instrumentos de su(esta&iones el)&tri&as* re&ono&iendo sus subestaciones eléctricas. puntos &r+ti&os , reda&tando el plan de d) Se han utilizado los instrumentos precisos para las operaciones de sistemas y se-uridad. equipos. g) Se ha simulado la operación sobre interruptores, seccionadores, entre otros. . Realia opera&iones de 'anteni'iento b) Se han identificado las partes, equipos y componentes susceptibles de &orre&ti2o de pri'er ni2el de las su(esta&iones mantenimiento de primer nivel.
el)&tri&as* interpretando t)&ni&a , apli&ando los esta(le&idos.
do&u'enta&i3n % Se /an se&uen&iado las a&tua&iones de &ontrol , 'anteni'iento de euipos pro&edi'ientos , de la instala&i3n.
Criterios de e2alua&i3n '+ni'os e4i-i(les
Aprendizae m!nimo
"nstrumento de evaluación
#.(.ii Se han identificado los equipos AM10. "dentifica los equipos y elementos y elementos de subestaciones de de subestaciones eléctricas de interior interior, susceptibles de #celdas aisladas en S$%), que requieren mantenimiento. mantenimiento. 5NDICE DE CONTENIDOS ( ecepción de una nueva sube S.*. ( +nión de celdas ( ontae de barras y trafos de tensión y corriente
( ontae de un C.-. de abonado ( uesta en servicio de un C.-. ( anual de mantenimiento
Actividad y&o e'amen
( *nsayos eléctrico y mec/nicos ( aniobras de mantenimiento en celdas de A.-. ( Chec01list para revisión de C.-.
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UD10. MONTAJE Y MANTENIMIENTO DE CELDAS DE A.T.
01. RECEPCIÓN DE UNA NUEVA SUBESTACIÓN SUBESTACIÓN 01. Recepción del local: Debe permitir un CT de compañía el acceso desde la vía pública, pública , tanto para las operaciones de mantenimiento como las de apertura y maniobra En los de abonado sólo es preciso que se pueda acceder a la zona de AT. • • • • •
Estar prevista la entrada entrada y salida de cables a través de un especio especio adecuado. adecuado. Disponer de ventilación ventilación natural natural adecuada. adecuada. No ser inundables. Ser independientes independientes de cualquier otro local de de otro servicio. servicio. Estar aislados aislados mecánicamente mecánicamente del resto del edificio.
02. Verificaciones previas: 1. Identificación y emplazamiento de la subestación. 2. Disponibilidad de plataforma de descarga y dimensiones recomendadas en puerta de acceso. 3. Dimensiones de de la sala que permitan permitan mantener las distancias distancias mínimas recomendadas recomendadas entre celdas, paredes y techo para explotación y seguridad del personal. 4. Disponibilidad de ventilación natural o forzada, energía, iluminación, calefacción y agua. 5 Base de asiento de celdas celdas correctamente dimensionada, dimensionada, alineada alineada y nivelada con desviaciones desviaciones inferiores a 1 mm. por m., y de +- 5 mm entre la primera y última celda del conjunto. 6. Zanja para tendido de los cables de dimensiones mínimas recomendadas y libre de obstáculos que impidan el normal acceso de cables a las celdas. 7. Limpieza esmerada de la sala. El montaje requiere una alta pulcritud
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UD10. MONTAJE Y MANTENIMIENTO DE CELDAS DE A.T.
03. Descarga y almacenaje: 1. Sacar al exterior de la funda de plástico las 4 Chapas laterales de suspensión, practicando un corte vertical sobre la funda, para habilitar los puntos de enganche. 2. Respetar las instrucciones de enganche para la descarga manteniendo siempre un buen equilibrio. 3. Utilizar medios de descarga y manipulación recomendados. 4. Antes depositar en el suelo lo más cercano posible a la puerta de acceso, retirar la paleta de madera soltando los 4 tornillos de fijación a la base. Depositar sobre tubos de unos 30 mm. de diámetro para transporte al interior. Si hay peldaño, suplementar mediante el uso de una plataforma provisional. 5. Observar los símbolos e instrucciones en el embalaje y respetarlos. 6. Es importante depositarlas en el orden previsto para el montaje.
04. Almacenaje apropiado: 1. Se trata de equipos sensibles sensibles para instalación instalación interior, que que deben estar protegidos contra daños en todo momento, y en ambiente ambiente limpio, seco y ventilado. ventilado. Estarán cubiertos de envolvente envolvente de plástico hasta el momento de ensamblaje. Los cortes en plástico serán cerrados mediante cinta adhesiva de suficiente anchura. 2. Si disponen de embalaje marítimo, 6 meses de almacenamiento intermedio como máximo.
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UD10. MONTAJE Y MANTENIMIENTO DE CELDAS DE A.T.
05. Verificaciones finales: 1. Conformidad del material y de los accesorios con la documentación asociada. 2. Verificación visual de los aparatos para comprobar comprobar eventuales daños daños de transporte. 3. Abrir el embalaje, temporalmente en lugar protegido de la intemperie, si se perciben daños. 4. Comprobar la indicación de la presión de gas SF6. SF 6. 5. Reparar daños de transporte. 6. Volver a embalar las celdas. 7. En caso de no conformidad notificar notificar la reclamación, reclamación, de forma inmediata, inmediata, según las indicaciones indicaciones en el apartado correspondiente al Manual Manual de instrucciones.
Antes de la conexión a la red de las diversas celdas de AT deben comprobarse sus valores nominales: • • • • • • • • •
Intensidad nominal de la la celda. celda. Tensión nominal y asignada asignada (en (en kV). Intensidad térmica térmica de corta corta duración en kA en en a 1s). Valor de cresta de la la intensidad de cortocircuito. cortocircuito. (en kA). Poder de cierre sobre cortocircuito del del interruptor seccionador seccionador principal. principal. Cierre brusco del seccionador seccionador de puesta a tierra. Verificación de la intensidad intensidad nominal de los fusibles. Comprobación del sinóptico (esquema unifilar) de las celdas. Verificar cierres cierres que posibiliten posibiliten la utilización de de bloqueos.
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U 10. MONTAJE Y MANTENIMIENTO DE CELDAS DE A.T.
06. Recepción del transfor ador: Antes Antes de de la puesta puesta en serv servici icioo d l trafo se debe comprobar la placa de car acterísticas, los niveles de refrigera refrigerante, nte, el termóm termómetro etro o sond sond a térmica y medir la resistencia de aisla iento: iento: • •
•
En el devana devanando ndo de AT entr entr fases y entre fase y tierra. En el devanado de BT entre fases fases y entr entree cada cada fase fase y tierra tierra;; entre entre neut neutro y tierra debe dar cero si el neutro está puesto a tierra. Entre el devanado primario y el devanado secundario.
02. UNIÓN DE CELDAS 01. Comprobaciones y primeras tareas:
1. Desplazar las celdas al lugar de montaje utilizando rodillos. 2. Depositar las celdas en el orden correcto, justamente delante del lugar de montaje, dejando suficiente espacio para la manipulación.
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UD10. MONTAJE Y MANTENIMIENTO DE CELDAS DE A.T.
02. Posicionamiento de la primera primera celda
1. Las celdas se encuentran en orden para ensamblarlas 2. Posicionar la primera celda del del extremo más lejano, depositando, depositando, con la ayuda de palanca, palanca, lo más exactamente posible sobre el lugar de montaje. La segunda celda y restantes a poca distancia para poder alinear antes de atornillarlas. Si el número de celdas es superior a 15, se posiciona la primera celda en el centro y se continúa el montaje por ambos laterales. 3 Alinear la primera celda en sentido longitudinal longitudinal de forma que se asegure el montaje, de todo el conjunto, sobre los puntos de nivelación previstos.
03. Nivelación de las celdas: 1. Alinear, con precisión, en sentido vertical y horizontal, la celda con un nivel, utilizando los tornillos de regulación situados en la base de las celdas. 2. Tener en cuenta el desnivel total de la instalación, elevando la celda lo necesario, 4 ó 5 mm., para que, al ensamblar las restantes, no surjan problemas. 3. Arrimar la unidad a acoplar hasta que se bese con la anterior. 4. Regular la posición y altura de la celda, mediante los tornillos de regulación y útil de distancia y nivelación. 5. Introducir las dos chapas de suspensión entre las dos celdas. 6. Colocar la junta de caucho en la parte frontal.
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UD10. MONTAJE Y MANTENIMIENTO DE CELDAS DE A.T.
04. Ensamblaje de las celdas: 1. Efectuar la fijación con tornillos t ornillos mientras se comprueba, mediante útil de verificación, que los pasatapas se encuentran al mismo nivel, y a una distancia de 600 mm.+-1. Esta comprobación y su ajuste, mediante los tornillos de regulación, se realizará, con útil, con los espárragos colocados sobre los pasatapas, de tres en tres t res celdas y avanzando celda a celda de forma progresiva. 2. Colocar las arandelas en la unión posterior superior y el suplemento suministrado, en la parte posterior inferior. 3. Efectuar la conexión de las pletinas de tierra de las celdas celdas contiguas. 4. Anclar las celdas a la base de asiento mediante tornillos, utilizando arandelas de suplemento si procede, para evitar deformaciones en el perfil de la celda.
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UD10. MONTAJE Y MANTENIMIENTO DE CELDAS DE A.T.
05. Conexiones de baja tensión: 1. Los cables de interconexión procedentes del exterior pueden ser conducidos al compartimento de bornes a través de canales dispuestos en el interior de la celda o bien directamente a través de bandejas de cables instalados a nivel de los bornes del cajón de baja tensión. 2. Retirar las tapas superiores del cajón de baja tensión para acceder a los bornes de conexión. 3. Las conexiones de cables procedentes del exterior se realizan, normalmente, sobre los bornes situados en la parte anterior, anterior, mientras que para las interconexiones interconexiones entre las celdas se utilizan los los bornes situados en el espacio posterior al compartimento. 4. Cerrar el compartimento reponiendo las tapas retiradas.
06. Montaje de cierres finales: 1. Previamente y tras el montaje de barras se habrá instalado el cierre de barras. 2. Colocar el montante lateral sobre la última celda, utilizando la tornillería y los elementos de los detalles, 1,2 y 3 del Manual. 3 -Montar el panel lateral delantero y el panel lateral posterior uniéndolo tanto al montante vertical como a la celda, utilizando utilizando los elementos de los los detalles,1,2 y3 del Manual. Manual. 4. Colocar la tapa de cierre superior sobre el panel lateral delantero y sobre la celda, utilizando
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UD10. MONTAJE Y MANTENIMIENTO DE CELDAS DE A.T.
01. Cerramiento del pasillo posterior: 1. Cerrar el acceso al pasillo posterior, en el caso de que el grupo de celdas, no esté montado contra la pared o no disponga de la protección de arco interno en las cuatro caras.
03. MONTAJE DE BARRAS Y TRAFOS DE TENSIÓN Y CORRIENTE CORRIENTE 01. Montaje de barras: 1. Asegurar que los los componentes de barras barras estén completos y exentos de golpes, golpes, rayas superficiales y desgarros. Comprobar la correcta nivelación y distancias en pasatapas. 2. Limpiar las partes aislantes de pasatapas, conectores, tapones aislantes y conductores de
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UD10. MONTAJE Y MANTENIMIENTO DE CELDAS DE A.T.
3. Preparar el tramo de barras: Colocar las bridas de conexión en los extremos de las barras y si se trata de un conector terminal “L”, colocar además la pieza de suplemento, para obtener un apriete simétrico. Encajar el conector sobre el extremo de la barra. Proceder de la misma forma, con el segundo conector, en el otro extremo de la barra. Si tiene que llevar transformador de intensidad, introducirlo en la barra observando el lado de entrada de la corriente. 4. Posicionar el tramo de barra sobre los pasatapas de las dos primeras celdas introduciendo en los espárragos roscados. Montar otro tramo de barra barra con un conector, e introducir en en el conector del tramo ya montado montado levantándolo ligeramente el conector, y posicionar introduciendo en los espárragos del pasatapas. Efectuar la misma operación en las restantes fases e ir avanzando celda a celda hasta completar la totalidad.
5. Colocar las arandelas elásticas con la convexidad hacia arriba. Colocar la tuerca y apretar, mediante útil dinamométrico, según el par recomendado. Conviene que el tensado en los conectores sea progresivo. Colocar el tapón aislante con el hilo de nylon para permitir la salida de aire durante el roscado y apretarlo y sacarlo lentamente. Girar el tapón roscado un cuarto de vuelta atrás (para distribuir la pasta de montaje) Apretar el tapón roscado, mediante útil dinamométrico, con el par recomendado. -Montar la tapa
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UD10. MONTAJE Y MANTENIMIENTO DE CELDAS DE A.T.
02. Montaje de transformadores de intensidad: 1. Introducir, en las barras, durante la fase de preparación de los tramos de barras, los transformadores de intensidad. Observar el lado de entrada de la corriente. Colocar el conjunto como si se tratara de una barra normal, siguiendo los pasos indicados en “montaje de barras”. 2. Realizar las conexiones de baja tensión empleando los esquemas eléctricos facilitados por MESA. 3. La colocación de los transformadores de la representación gráfica corresponde al caso en que la medida se efectúa en la primera celda de la derecha de un grupo de celdas. Actuaríamos de forma similar para el caso en que la medida se efectuara en la celda de la izquierda del grupo de celdas. Tener presente el lado de entrada de la corriente
03. Montaje de barras en celda de remonte: 1. En la celda de acoplamiento, no hay que conectar las barras en su parte superior sino en su parte inferior (zona de conexión de cables). Poner a tierra las barras en las celda de “remonte” y “acoplamiento”, cerrando el seccionador de tierra en el primero, y el seccionador de tierra y el interruptor automático en el de acoplamiento para liberar el acceso a los compartimientos de barras.
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UD10. MONTAJE Y MANTENIMIENTO DE CELDAS DE A.T.
2. Colocar el soporte de los transformadores de intensidad sobre la pared de la cuba, si lleva transformadores de intensidad. Introducir los T.I. durante la preparación del tramo de de barras, Observando el lado lado de entrada de la corriente. Realizar las conexiones da baja empleando los esquemas eléctricos facilitados por MESA. 3. Efectuar el montaje de barras siguiendo los pasos indicados en “Montaje de barras”. En este caso, el tramo de barras se preparará con dos conectores en “L” en los extremos de la barra. 4. Colocar los paneles de cierre de los compartimientos de barras inferiores. Poner en posición abierto, primero el interruptor automático y después los seccionadores de tierra. Desconectar la tensión auxiliar.
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UD10. MONTAJE Y MANTENIMIENTO DE CELDAS DE A.T.
2. Aflojando las tuercas de la zona de regulación, regulación, dejar descender el TT., y cuando haga tope con el espárrago extraer el hilo de nylon. La tuerca t uerca inferior no sujetara la base del TT. Fijar el conjunto mediante las tuercas de la zona de regulación, evitando modificar accidentalmente la altura altura del transformador; Para ello, llevar la tuerca superior hasta hasta la placa y a continuación apretar la tuerca inferior contra la placa. Comprobar el paralelismo de la base del transformador con respecto a la cuba. La distancia de las esquinas a la cuba tiene una tolerancia de +-1 mm. Conectar a tierra la base metálica del transformador mediante los cables suministrados. 3. Para ubicar los transformadores y realizar las conexiones de baja tensión, utilizar los planos facilitados por MESA. La disposición de la imagen corresponde a la colocación de transformadores de tensión en la primera celda de la derecha del grupo de celdas.
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UD10. MONTAJE Y MANTENIMIENTO DE CELDAS DE A.T.
05. Montaje de cables de potencia: 1. Acondicionar el acceso al compartimiento de cables mediante la puesta a tierra de la línea. Soltar las bridas de amarre de los cables. Comprobar las cotas desde el fondo fondo de la zanja a la base de la celda, para la preparación preparación correcta de la terminación y del tendido del cable en la zanja. Asegurar que, en la zanja, no hay obstáculos que dificulten el acceso libre de los cables a los pasatapas y puedan crear tensiones t ensiones perjudiciales en la conexión.
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UD10. MONTAJE Y MANTENIMIENTO DE CELDAS DE A.T.
5. Engrasar, con pasta aislante, de forma homogénea, el bicono de acoplamiento y las partes internas del conector acodado. Posicionar el conector y atornillar a la borna del bicono. Engrasar y posicionar el tapón aislante, roscándolo sobre el conector, con la ayuda de hilo de nylon para evitar bolsas de aire. Efectuar las conexiones a tierra de las pantallas de los dos juegos de cables y conectores. Colocar la tapa del conector. Efectuar las mismas operaciones en las otras dos fases. 6. Fijar los cables por medio de las bridas. Retornar a la posición “línea aislada de barras”: Colocar el panel, bajar el bulón de enclavamiento del compartimiento de cables hasta el tope de su recorrido. Abrir el interruptor automático pulsando el botón rojo de abrir. A continuación, abrir el seccionador de tierra. Para ello, fijar el selector de maniobra en la posición “amarillo”, insertar la palanca, y girar hasta el tope en 210º, en el sentido contrario a las agujas del reloj. Extraer la palanca y poner el selector en posición “0” La línea queda nuevamente en posición aislada de barras.
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UD10. MONTAJE Y MANTENIMIENTO DE CELDAS DE A.T.
Se pueden ver los capuchones aislantes de las posibles conexiones. La primera unión que vamos a realizar será la de los cables de media tensión que llegan al CT con acometida subterránea, dichos cables pueden usar varias formas de conexión en la celda:
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UD10. MONTAJE Y MANTENIMIENTO DE CELDAS DE A.T.
En la siguiente imagen vemos otro tipo de celdas que usan el mismo sistema superior de conexión de embarrado. Pero este con conectores enchufables. Al final de la última celda la salida es por altura a través de pasatapas exteriores que comunican todo el conjunto modular con otra celda o con el transformador de distribución. La unión en nuestro caso entre la última celda de línea y la celda de remonte se realiza por la parte superior también y se protege el tornillo de fijación con un capuchón aislante negro para evitar arcos eléctricos. La celda de remonte funciona de celda de interruptor pasante, bajando el embarrado a la parte inferior de la celda, con lo que se debe subir de nuevo a embarrado para pasar a la celda de protección de transformador, dicha subida se realiza de pletina de cobre plana con aislamiento.
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UD10. MONTAJE Y MANTENIMIENTO DE CELDAS DE A.T.
Del pasamuros se partirá a la zona de AT del trafo con cable de AT apantallado y se conectará con terminal exterior al pasatapas de AT de dicho trafo. Dichos cables conectarán sus protecciones de tierra o pantallas a la envolvente del trafo (si es de aceite) o a la puesta a tierra de protección. Nos faltarían las salidas al cuadro de baja tensión que llevarían sus conectores enchufables de cables de BT y su conexión del neutro a la tierra de servicio. Y por fin interconectar los cables o pletinas de cobre de tierra de cada celda a través de otras pletinas sin aislar para conectarlo todo al sistema de tierra de protección.
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UD10. MONTAJE Y MANTENIMIENTO DE CELDAS DE A.T.
Lo importante de la imagen es la funcionalidad de las dos celdas de línea. Dichas celdas tienen como elemento de maniobra un interruptor-seccionador de puesta a tierra y un elemento de señalización de presencia de tensión de tipo capacitivo. Será este interruptor el que usaremos para abrir y cerrar partes del anillo para poder realizar las maniobras de entrada en servicio. Si vamos a colocar un nuevo CT entre el CT1 y el CT2, partimos de que todo el sistema está conectado y funcionando.
Lo primero que debemos solicitar es una SOLICITUD DE DESCARGO: DESCARGO: Es un pliego a la compañía suministradora de la zona para que esté enterada de los trabajos que vamos a realizar y de las características más importantes de la operación. (Esquema previo
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UD10. MONTAJE Y MANTENIMIENTO DE CELDAS DE A.T.
En el CT1 debemos abrir el interruptor-seccionador de la celda de línea de salida hacia el CT2, el CT1 sigue alimentado por la celda de línea que lo conecta al centro de reparto. Y sigue dando alimentación a sus abonados en BT al mantener tensión en sus embarrados a través de la celda de línea contigua. Ahora toca la misma labor en el CT2, abrimos el interruptor-seccionador que unía el CT2 con el CT1 y mantenemos la alimentación de los abonados de BT del CT2.
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UD10. MONTAJE Y MANTENIMIENTO DE CELDAS DE A.T.
Por último vamos a realizar las MANIOBRAS DE CONEXIÓN EN EL NUEVO CT. CT. Para ello lo primero es conectar a tierra los seccionadores de PAT del nuevo CT (todos los que tengan las celdas). Nos aseguramos que todos los elementos de corte del nuevo CT estén abiertos y realizamos una comprobación visual de los elementos. Ya preparado el CT nuevo, se procede a ABRIR LOS SECCIONADORES DE TIERRA DE LOS CT1 Y CT2. Y luego se cierran las puertas de dichas celdas en CT1 y CT2, y se conecta el interruptor-seccionador de salida del CT1 que alimentará ahora a la celda de entrada del nuevo CT (que detectará tensión en la entrada), pero que mantiene el interruptor abierto y no alimenta el embarrado del CT.
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UD10. MONTAJE Y MANTENIMIENTO DE CELDAS DE A.T.
06. MANUAL DE MANTENIMIENTO MANTENIMIENTO Se recomienda que el acceso a las instalaciones con este tipo de celdas esté restringido a personal autorizado y cualificado, debido, principalmente, a los peligros que acarrea la manipulación de la energía eléctrica. Estas celdas están diseñadas para prestar su servicio con bajo mantenimiento. No obstante, se aconseja una inspección periódica (5 años) de las mismas, realizándose la verificación del estado del gas y las tareas normales de limpieza y comprobación del estado de los elementos externos. Dentro de los trabajos de mantenimiento que se suelen realizar en el interior de los centros de
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UD10. MONTAJE Y MANTENIMIENTO DE CELDAS DE A.T.
02.
Comprobación del estado interno del gas
A pesar de que estos equipos han sido comprobados en fábrica para garantizar un funcionamiento fiable durante 30 años, sin reposición de gas, los equipos van dotados de un manómetro de comprobación del estado del gas. Dicho estado será el adecuado siempre y cuando la aguja esté situada dentro de la zona verde. Si la indicación está en zona naranja no existe peligro de maniobra pero es necesario ponerse en contacto con el servicio asistencia técnica de MESA.
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UD10. MONTAJE Y MANTENIMIENTO DE CELDAS DE A.T.
MANTENIMIENTO DEL MECANISMO DE OPERACIÓN DEL INTERRUPTOR. ATENCIÓN: ATENCIÓN: Antes de proceder a las operaciones de mantenimiento asegúrese de que: -La unidad se encuentra fuera de servicio. -El interruptor se encuentra abierto. -Los muelles de carga se encuentran descargados. Se deberá limpiar y engrasar el mecanismo de operación, utilizando el tipo de lubricante y aceite recomendado (Isoflex Topas NB52). PROTECCIÓN DE LAS PARTES ABIERTAS DE LA INSTALACIÓN
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UD10. MONTAJE Y MANTENIMIENTO DE CELDAS DE A.T.
02. Ensayo de tensión reducida reducida a frecuencia industrial industrial de barras 1-Poner todas las celdas en posición de “línea aislada de barras”. 2-Liberar el acceso al compartimiento de cables poniendo a tierra la línea de alimentación de la tensión de ensayo. 3-Conectar el cable de ensayo de tensión al pasatapas de alimentación de la celda. Conectar la pantalla de cable a tierra en ambos extremos del cable. -Poner a tierra las otras dos fases mediante hilo de cobre.
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UD10. MONTAJE Y MANTENIMIENTO DE CELDAS DE A.T.
6-Poner nuevamente la línea a tierra. -Retirar las alimentaciones y conexiones de ensayo. -Incorporar los transformadores de tensión y / o los pararrayos, si procede. 7-Retornar a la posición inicial del circuito “Línea seccionada de barras” y colocar los cierres finales de las celdas y barras, siguiendo los pasos establecidos al efecto.
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UD10. MONTAJE Y MANTENIMIENTO DE CELDAS DE A.T.
2-Comprobar el correcto funcionamiento eléctrico del interruptor automático:
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UD10. MONTAJE Y MANTENIMIENTO DE CELDAS DE A.T.
Los elementos que sobresalen en la parte inferior de los ejes de maniobra son los bloqueos mecánicos para impedir que se pueda actuar a la vez en los dos ejes.
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UD10. MONTAJE Y MANTENIMIENTO DE CELDAS DE A.T.
Veamos la disposición de los elementos dentro de la parte frontal de la celda con su esquema básico En la imagen podemos ver la disposición de los elementos de maniobra.
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UD10. MONTAJE Y MANTENIMIENTO DE CELDAS DE A.T.
09. CHECK-LIST PARA REVISIÓN REVISIÓN DE C.T. En
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UD10. MONTAJE Y MANTENIMIENTO DE CELDAS DE A.T.
1.8
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