Curso básico de instalaciones eléctricas /

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Detalles Bibliográficos
Autor Principal:	Calloni, Juan C.
Otros autores o Colaboradores:	Rodriguez, Pedro C.
Formato:	Libro
Lengua:	español
Datos de publicación:	Buenos Aires : Alsina, 2004.
Edición:	2a. ed.
Temas:	INSTALACIONES ELECTRICAS PROTECCION ELECTRICA MANTENIMIENTO
Resumen:	1- Consideraciones generales sobre la Reglamentaciónde la AEA. 2- Proyecto de la instalación eléctrica. 3- Coordinación de las protecciones. 4- Caída de tensión en las líneas principales. 5- Esquema general de instalaciones eléctricas. 6- Análisis de cargas en los edificios. 7- Consideraciones operativas sobre los circuitos. 8- Circuitos eléctricos. 9- Tecnología de los elementos utilizados en las instalaciones. 10- Elementos de maniobra para la tecnología de las conexiones. 11- Cañerías protectoras. 12- Tableros eléctricos para inmuebles. 13- Interruptores automáticos termomagnéticos.14- Fuerza motriz. 15- Seguridad eléctrica. 16- Motores eléctricos. 17- Iluminación. 18- Porteros eléctricos. 19- Mantenimiento de las instalaciones eléctricas.
Descripción Física:	292 p. : il.
ISBN:	9505531060

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foreach (glob($this->path . '/sess_*') as $filename) { if (filemtime($filename) + $maxlifetime < time()) { unlink($filename); } } return true; } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ protected function saveSession($sessId, $data): bool { $sessFile = $this->path . '/sess_' . $sessId; if ($handle = fopen($sessFile, 'w')) { $return = false; // Lock the file for exclusive access to avoid issues with multiple // processes writing session simultaneously: if (flock($handle, LOCK_EX)) { $return = fwrite($handle, $data); // Make sure that there's no trailing data by truncating the file to // the correct length: ftruncate($handle, strlen($data)); fflush($handle); flock($handle, LOCK_UN); } fclose($handle); if ($return !== false) { return true; } } // If we got this far, something went wrong with the file output... // It is tempting to throw an exception here, but this code is called // outside of the context of exception handling, so all we can do is // echo a message.

// Anecdotal testing Today and Yesterday seems to indicate destroy() // is called by the garbage collector and everything is good. // Something to keep in mind though. return true; } /** * Write function that is called when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ public function write($sessId, $data): bool { if ($this->writesDisabled) { return true; } return $this->saveSession($sessId, $data); } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ abstract protected function saveSession($sessId, $data): bool; }

* * @return void */ public function writeClose() { // The assumption is that we're using PHP's ext/session. // session_write_close() will actually overwrite $_SESSION with an // empty array on completion -- which leads to a mismatch between what // is in the storage object and $_SESSION. To get around this, we // temporarily reset $_SESSION to an array, and then re-link it to // the storage object. // // Additionally, while you _can_ write to $_SESSION following a // session_write_close() operation, no changes made to it will be // flushed to the session handler. As such, we now mark the storage // object isImmutable. $storage = $this->getStorage(); if (! $storage->isImmutable()) { $_SESSION = $storage->toArray(true); session_write_close(); $storage->fromArray($_SESSION); $storage->markImmutable(); } } /** * Attempt to set the session name * * If the session has already been started, or if the name provided fails * validation, an exception will be raised. * * @param string $name * @return SessionManager * @throws Exception\InvalidArgumentException */ public function setName($name) { if ($this->sessionExists()) { throw new Exception\InvalidArgumentException( 'Cannot set session name after a session has already started'

Environment & details:

GET Data empty

POST Data empty

Files empty

Key	Value
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Environment Variables empty

Registered Handlers

0. Whoops\Handler\PrettyPageHandler

Environment & details:

GET Data empty

POST Data empty

Files empty

Key	Value
language	"es"
VUFIND_SESSION	"2pj758com5i7hcmh0c1a7mell4"
ui	"standard"

Session

Key	Value
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Key	Value
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REDIRECT_VUFIND_LOCAL_DIR	"/usr/local/vufind/local"
REDIRECT_HTTPS	"on"
REDIRECT_SSL_TLS_SNI	"catalogo.bibliotecas.unlp.edu.ar"
REDIRECT_STATUS	"200"
VUFIND_ENV	"development"
VUFIND_LOCAL_DIR	"/usr/local/vufind/local"
HTTPS	"on"
SSL_TLS_SNI	"catalogo.bibliotecas.unlp.edu.ar"
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SERVER_NAME	"catalogo.bibliotecas.unlp.edu.ar"
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SERVER_PORT	"443"
REMOTE_ADDR	"3.128.206.181"
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REQUEST_SCHEME	"https"
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SERVER_PROTOCOL	"HTTP/1.1"
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QUERY_STRING	""
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SCRIPT_NAME	"/index.php"
PHP_SELF	"/index.php"
REQUEST_TIME_FLOAT	1738364524.1266
REQUEST_TIME	1738364524

Environment Variables empty

Registered Handlers

0. Whoops\Handler\PrettyPageHandler

Curso básico de instalaciones eléctricas /

Consultar en el catálogo de Biblioteca FING

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