{"id":7516,"date":"2015-09-18T14:38:56","date_gmt":"2015-09-18T17:38:56","guid":{"rendered":"http:\/\/treetech.com.br\/en\/articles\/others\/tecnologia-preditiva-no-transformador-de-potencia-da-johnsonjohnson"},"modified":"2016-08-29T14:52:25","modified_gmt":"2016-08-29T17:52:25","slug":"predictive-technology-in-the-johnsonjohnson-power-transformer","status":"publish","type":"post","link":"https:\/\/treetech.com.br\/en\/predictive-technology-in-the-johnsonjohnson-power-transformer\/","title":{"rendered":"Predictive Technology in the Johnson&#038;Johnson Power Transformer"},"content":{"rendered":"<div class=\"wpb-content-wrapper\">[vc_row][vc_column width=&#8221;2\/3&#8243;][vc_column_text]\n<h1><strong>Abstract<\/strong><\/h1>\n<p>Electric power is a fundamental input for the industrial production of the Johnson&amp;Johnson plant in S\u00e3o Jos\u00e9 dos Campos-SP. Keeping the park operating correctly has always been a priority for the maintenance teams.<\/p>\n<p>The main substation, and specially the input transformer have always had a complete preventive maintenance program and their technology is constantly being updated for early flaw detection.<\/p>\n<p>With the purpose to promote better plant reliability and availability, an online transformer monitoring system was installed between 2014 and 2015, composed of sensors and software, for daily monitoring of transformer operating status.<\/p>\n<p>In this paper we describe the architecture and the solutions applied in the system, as well as the changes in maintenance routine, the assertiveness in the resolution of eventual problems and the operational security gains inside the complex.[\/vc_column_text][\/vc_column][vc_column width=&#8221;1\/3&#8243;][vc_single_image image=&#8221;6223&#8243; alignment=&#8221;none&#8221;]<div class=\"vcex-spacing wpex-w-100 wpex-clear\"><\/div><style>.vcex-button.vcex_69da0dae34966{background:#b2b2b2;color:#ffffff!important;}.vcex-button.vcex_69da0dae34966:hover{background:#008242!important;}<\/style><div class=\"theme-button-wrap textcenter theme-button-block-wrap wpex-block wpex-clear wpex-clr\"><a href=\"http:\/\/treetech.com.br\/wp-content\/uploads\/2016\/01\/Johnson_TT_2015_eng.pdf\" class=\"vcex-button theme-button flat grey medium align-center block vcex_69da0dae34966\" title=\"Download\"><span class=\"vcex-button-inner theme-button-inner wpex-flex wpex-flex-wrap wpex-items-center wpex-justify-center\"><span class=\"vcex-button-icon vcex-icon-wrap theme-button-icon-left\"><span class=\"wpex-icon\" aria-hidden=\"true\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 512 512\"><path d=\"M64 464l48 0 0 48-48 0c-35.3 0-64-28.7-64-64L0 64C0 28.7 28.7 0 64 0L229.5 0c17 0 33.3 6.7 45.3 18.7l90.5 90.5c12 12 18.7 28.3 18.7 45.3L384 304l-48 0 0-144-80 0c-17.7 0-32-14.3-32-32l0-80L64 48c-8.8 0-16 7.2-16 16l0 384c0 8.8 7.2 16 16 16zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\"\/><\/svg><\/span><\/span>Download<span class=\"vcex-button-icon vcex-icon-wrap theme-button-icon-right\"><span class=\"wpex-icon\" aria-hidden=\"true\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 512 512\"><path d=\"M288 32c0-17.7-14.3-32-32-32s-32 14.3-32 32V274.7l-73.4-73.4c-12.5-12.5-32.8-12.5-45.3 0s-12.5 32.8 0 45.3l128 128c12.5 12.5 32.8 12.5 45.3 0l128-128c12.5-12.5 12.5-32.8 0-45.3s-32.8-12.5-45.3 0L288 274.7V32zM64 352c-35.3 0-64 28.7-64 64v32c0 35.3 28.7 64 64 64H448c35.3 0 64-28.7 64-64V416c0-35.3-28.7-64-64-64H346.5l-45.3 45.3c-25 25-65.5 25-90.5 0L165.5 352H64zm368 56a24 24 0 1 1 0 48 24 24 0 1 1 0-48z\"\/><\/svg><\/span><\/span><\/span><\/a><\/div> [\/vc_column][\/vc_row][vc_row][vc_column width=&#8221;2\/3&#8243;]<div class=\"vcex-spacing wpex-w-100 wpex-clear\" style=\"height:10px;\"><\/div>[vc_accordion][vc_accordion_tab title=&#8221;Authors&#8221;][vc_column_text]\n<table class=\" alignleft\" style=\"color: #7e7c7c; height: 121px;\" width=\"443\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td class=\"td_item\" style=\"font-weight: bold; text-align: left;\">Johnson &amp; Johnson<\/td>\n<td>Luiz B. S. Chacon<\/td>\n<\/tr>\n<tr>\n<td class=\"td_item\" style=\"font-weight: bold; text-align: left;\">Treetech Sistemas Digitais Ltda.<\/td>\n<td>Murilo A. Toledo<\/td>\n<\/tr>\n<tr>\n<td class=\"td_item\" style=\"font-weight: bold; text-align: left;\">Treetech Sistemas Digitais Ltda.<\/td>\n<td>Lucas Pavan Fritoli<\/td>\n<\/tr>\n<tr>\n<td class=\"td_item\" style=\"font-weight: bold; text-align: left;\">Treetech Sistemas Digitais Ltda.<\/td>\n<td>Hirokazu T. B. Ito<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n[\/vc_column_text][\/vc_accordion_tab][\/vc_accordion][\/vc_column][vc_column width=&#8221;1\/3&#8243;][\/vc_column][\/vc_row][vc_row][vc_column]<div class=\"vcex-spacing wpex-w-100 wpex-clear\"><\/div>[vc_text_separator title=&#8221;1.0 &#8211; INTRODUCTION&#8221; element_type=&#8221;div&#8221; span_color=&#8221;#008842&#8243;]<div class=\"vcex-spacing wpex-w-100 wpex-clear\"><\/div>[vc_column_text]Johnson&amp;Johnson industrial plant, in S\u00e3o Jos\u00e9 dos Campos-SP is responsible for manufacturing hygiene and personal health products, in addition to a dedicated hospital product line. Inside the productive process, electric energy is an indispensable input and an eventual power failure compromises the programming and may cause huge company losses.<\/p>\n<p>The plant&#8217;s electric power is supplied by a 25 MVA installed power substation in the factory itself, which can be seen in figure 1, with only one 88kV transformer &#8211; a key piece of equipment to keep the production system up and running. In face of all this, all the corrective and preventive maintenance control is strict and done according to the standards and good practices of the sector.<\/p>\n<p>The infrastructure engineering area is responsible for promoting technological innovation in the park therefore allowing ongoing reliable and safe plant expansion. In this context, the implementation of the predictive maintenance concepts was defined, aiming at improving processes and asset management.<\/p>\n<p>This was allowed with the installation of a transformer online monitoring system to monitor the transformer&#8217;s operation status. Involving sensors, software and change in maintenance plans, Johnson is innovating again and keeping the tradition of being a technological leader.[\/vc_column_text]<div class=\"vcex-spacing wpex-w-100 wpex-clear\"><\/div>[vc_single_image image=&#8221;7505&#8243; alignment=&#8221;center&#8221;][vc_column_text]\n<p style=\"text-align: center;\"><em><strong>Figure 1 &#8211; \u00a088 kV\u00a0Substation<\/strong><\/em><\/p>\n[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column]<div class=\"vcex-spacing wpex-w-100 wpex-clear\"><\/div>[vc_text_separator title=&#8221;2.0 &#8211; ONLINE MONITORING FOR FAILURE PREDICTION&#8221; element_type=&#8221;div&#8221; span_color=&#8221;#008842&#8243;]<div class=\"vcex-spacing wpex-w-100 wpex-clear\"><\/div>[vc_column_text]Online monitoring technology was chosen by taking into consideration the following criteria:<\/p>\n<ul>\n<li>The diagnosis of the transformer&#8217;s current status in order to decide whether to keep it in operation or not &#8211; facility reliability;<\/li>\n<li>Early diagnosis of failure conditions in incipient evolution stages so equipment maintenance downtime can be programmed for corrective actions &#8211; plant availability;<\/li>\n<li>Equipment operating conditions are monitored along its whole service life to keep the aging process under control &#8211; full service life management.<\/li>\n<li>The use of the transformer in overload or risk conditions, but with total knowledge and control of the several variables involved, without incurring excessive risks &#8211; operational safety<\/li>\n<\/ul>\n[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column]<div class=\"vcex-spacing wpex-w-100 wpex-clear\"><\/div>[vc_text_separator title=&#8221;3.0 &#8211; PHILOSOPHY IMPLEMENTED&#8221; element_type=&#8221;div&#8221; span_color=&#8221;#008842&#8243;]<div class=\"vcex-spacing wpex-w-100 wpex-clear\"><\/div>[vc_column_text]In order to meet the proposal technical and financial objectives, Johnson&amp;Johnson adopted the following functionalities:<\/p>\n<ol>\n<li>Variable Measurement through sensors in a decentralized architecture.<\/li>\n<\/ol>\n<p>Specialist sensors to measure electrical, mechanical and chemical values of the power transformer, see Table 01 They are communicating via RS485 network through an open Modbus protocol with the monitoring software in the control room (architecture in Figure 02)[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column]<div class=\"vcex-spacing wpex-w-100 wpex-clear\"><\/div>[vc_row_inner][vc_column_inner][vc_column_text]\n<p style=\"text-align: center;\">\n<table id=\"tablepress-40\" class=\"tablepress tablepress-id-40 tbody-has-connected-cells\">\n<thead>\n<tr class=\"row-1\">\n\t<th class=\"column-1\"><strong>Smart Sensor <\/strong><\/th><th class=\"column-2\"><strong>Specialty<\/strong><\/th><th class=\"column-3\"><strong>Goal<\/strong><\/th>\n<\/tr>\n<\/thead>\n<tbody class=\"row-striping row-hover\">\n<tr class=\"row-2\">\n\t<td rowspan=\"3\" class=\"column-1\">Temperature Monitor<\/td><td class=\"column-2\">Functions 26 and 49<\/td><td class=\"column-3\">Equipment protection<\/td>\n<\/tr>\n<tr class=\"row-3\">\n\t<td class=\"column-2\">Transformer thermal management<\/td><td class=\"column-3\">Guarantee the required conditions for more power in the grid<\/td>\n<\/tr>\n<tr class=\"row-4\">\n\t<td class=\"column-2\">Ventilation system management<\/td><td class=\"column-3\">Garantir as condi\u00e7\u00f5es exigidas para mais pot\u00eancia na rede<\/td>\n<\/tr>\n<tr class=\"row-5\">\n\t<td rowspan=\"3\" class=\"column-1\">Voltage Regulation Relay<\/td><td class=\"column-2\">Function 90<\/td><td class=\"column-3\">Regulate voltage correctly according to the company's needs<\/td>\n<\/tr>\n<tr class=\"row-6\">\n\t<td class=\"column-2\">Better power quality<\/td><td class=\"column-3\">Provide the best voltage range to meet the demand by the company<\/td>\n<\/tr>\n<tr class=\"row-7\">\n\t<td class=\"column-2\">OLTC wear and tear management<\/td><td class=\"column-3\">Predict if there is need for corrective interventions in the OLTC mechanism <\/td>\n<\/tr>\n<tr class=\"row-8\">\n\t<td rowspan=\"3\" class=\"column-1\">Bushing Monitor<\/td><td class=\"column-2\">Capacitance monitoring<\/td><td rowspan=\"3\" class=\"column-3\">Predict catastrophic failure (explosion);<br \/>\nObtain higher plant availability other than preventive maintenance offline tests<\/td>\n<\/tr>\n<tr class=\"row-9\">\n\t<td class=\"column-2\">Power factor monitoring<\/td>\n<\/tr>\n<tr class=\"row-10\">\n\t<td class=\"column-2\">Leakage current monitoring<\/td>\n<\/tr>\n<tr class=\"row-11\">\n\t<td rowspan=\"4\" class=\"column-1\">Gas and Humidity Monitor<\/td><td rowspan=\"2\" class=\"column-2\">Water in oil monitoring<\/td><td class=\"column-3\">Get the most possible power available for production<\/td>\n<\/tr>\n<tr class=\"row-12\">\n\t<td class=\"column-3\">Control the right time for corrective maintenance (oil treatment)<\/td>\n<\/tr>\n<tr class=\"row-13\">\n\t<td rowspan=\"2\" class=\"column-2\">Monitoring of H2 in oil <\/td><td class=\"column-3\">Early identification of internal failure in equipment<\/td>\n<\/tr>\n<tr class=\"row-14\">\n\t<td class=\"column-3\">Back-up of the chromatographic preventive tests<\/td>\n<\/tr>\n<tr class=\"row-15\">\n\t<td class=\"column-1\">Transformer Ventilation system monitor<\/td><td class=\"column-2\">Transformer insulation maintenance.<\/td><td class=\"column-3\">Keep the humidity at allowed levels in the conservator tank<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n[\/vc_column_text][\/vc_column_inner][\/vc_row_inner]<div class=\"vcex-spacing wpex-w-100 wpex-clear\"><\/div>[vc_row_inner][vc_column_inner width=&#8221;1\/2&#8243;][vc_single_image image=&#8221;7507&#8243; alignment=&#8221;center&#8221;][vc_column_text]\n<p style=\"text-align: center;\"><em><strong>Figure 3 &#8211;\u00a0Implemented Architecture<\/strong><\/em><\/p>\n[\/vc_column_text][\/vc_column_inner][vc_column_inner width=&#8221;1\/2&#8243;][vc_single_image image=&#8221;7509&#8243; alignment=&#8221;center&#8221;][vc_column_text]\n<p style=\"text-align: center;\"><em><strong>Figure 3\u00a0&#8211; Data server with the online monitoring software<\/strong><\/em><\/p>\n[\/vc_column_text][\/vc_column_inner][\/vc_row_inner]<div class=\"vcex-spacing wpex-w-100 wpex-clear\"><\/div>[vc_row_inner][vc_column_inner][vc_column_text]2. Measurement storage<\/p>\n<p>Measurements by intelligent sensors installed in the transformer are taken to a data server installed in the substation control room (as shown in Figure 03).<\/p>\n<p>Everything that is measured is recorded in historic data bases through any resources deemed necessary to ensure information availability (backups, disc mirroring, etc.) Therefore, the whole transformer service life behavior can be monitored.<\/p>\n<p>The analysis of this behavior along time shall allow Johnson&amp;Johnson\u2019s engineering team to identify standards and trends and therefore to define more assertive actions.<\/p>\n<p>3.\u00a0Information processing<\/p>\n<p>The monitoring system provides information beyond the &#8220;raw&#8221; data acquired from measuring equipment, shown in Figures 04 to 07.[\/vc_column_text][\/vc_column_inner][\/vc_row_inner]<div class=\"vcex-spacing wpex-w-100 wpex-clear\"><\/div>[vc_row_inner][vc_column_inner width=&#8221;1\/4&#8243;][vc_single_image image=&#8221;7510&#8243;][vc_column_text]\n<p style=\"text-align: center;\"><em><strong>Figura 4 &#8211; Monitoring panel<\/strong><\/em><\/p>\n[\/vc_column_text][\/vc_column_inner][vc_column_inner width=&#8221;1\/4&#8243;][vc_single_image image=&#8221;7501&#8243;][vc_column_text]\n<p style=\"text-align: center;\"><em><strong>Figura 5\u00a0&#8211; Temperature Monitors and Bushings<\/strong><\/em><\/p>\n[\/vc_column_text][\/vc_column_inner][vc_column_inner width=&#8221;1\/4&#8243;][vc_single_image image=&#8221;7502&#8243;][vc_column_text]\n<p style=\"text-align: center;\"><em><strong>Figura 6\u00a0&#8211; Voltage\u00a0 Regulator and Paralleling Supervisor<\/strong><\/em><\/p>\n[\/vc_column_text][\/vc_column_inner][vc_column_inner width=&#8221;1\/4&#8243;][vc_single_image image=&#8221;7503&#8243;][vc_column_text]\n<p style=\"text-align: center;\"><em><strong>Figura 7\u00a0&#8211; Gas and Humidity Monitor<\/strong><\/em><\/p>\n[\/vc_column_text][\/vc_column_inner][\/vc_row_inner]<div class=\"vcex-spacing wpex-w-100 wpex-clear\"><\/div>[vc_column_text]The use of digital computer processing capacity (Specialist Systems) through mathematical and logical models provides transformer operation status diagnosis and prognosis. This translates engineering knowledge about the machine into a software able to emulate certain aspects of its behavior. Therefore the monitoring system contributes for the prediction of adverse conditions and knowledge maintenance, which does not depend only on human agents involved any more.<\/p>\n<p>The models used in the S\u00e3o Jos\u00e9 dos Campos- SP plant were:<\/p>\n<p>A. Insulation aging calculation<\/p>\n<p>Insulation aging through pyrolisis and hydrolisis (NBR5416, IEC60076 e IEEE\/ANSI C57.91)<\/p>\n<p>&#8211; Remaining service life percentage control, loss of daily average life and remaining service life time prediction.<\/p>\n<p>B. Water in oil content calculation<\/p>\n<p>Water in oil content, with evolution trend and temperature for free water formation<\/p>\n<p>&#8211; Loading restrictions control<\/p>\n<p>C. Water on paper content calculation<\/p>\n<p>Water on paper percentage, with an estimate of service life loss acceleration through hydrolysis and bubble formation temperature calculation;<\/p>\n<p>&#8211; Loading restrictions control<\/p>\n<p>D. Cooling system efficiency calculation<\/p>\n<p>Comparison between calculated top oil temperature and the same measured temperature.<\/p>\n<p>&#8211; Preservation of the transformer supporting all loading requirements.<\/p>\n<p>E. Future temperature calculation<\/p>\n<p>Prediction of future temperatures, with indication of remaining times to reach alarm and disconnection levels, as needed.<\/p>\n<p>&#8211; Power cut planning without changing the plant production plan<\/p>\n<p>F. Chromatographic and physicochemical offline calculation<\/p>\n<p>History record and offline analysis of oil gas chromatography tests and physicochemical tests<\/p>\n<p>&#8211; Test organization and early identification of internal failures<\/p>\n<p>4. Information availability<\/p>\n<p>Using the potentiality of the automatic monitoring system, information is made available to all interested sectors of the company (maintenance, operation, automation&#8230;) in simultaneous and unlimited access &#8211; transformer information democratization.<\/p>\n<ul>\n<li>Local access &#8211; from the server itself in the control room.<\/li>\n<li>Remote access through the Internet &#8211; from any remote computer connected to the company&#8217;s intranet.<\/li>\n<\/ul>\n<p>In the concept of &#8220;exception&#8221; the system is responsible for alerting against computer behavior abnormalities, and this means there is no need to have someone dedicated 24\/7 to the system. This assists the maintenance team work in planning and performing their jobs, by sending information &#8211; via alarms and e-mails &#8211; about any critical situations which must be addressed. In Figure 08, the identification screen shows the occurrence in a graphic and friendly way.[\/vc_column_text]<div class=\"vcex-spacing wpex-w-100 wpex-clear\"><\/div>[vc_single_image image=&#8221;7504&#8243;][vc_column_text]\n<p style=\"text-align: center;\"><em><strong>Figure 8\u00a0&#8211; Monitoring software screen with the transformer failure graphic identification system<\/strong><\/em><\/p>\n[\/vc_column_text]<div class=\"vcex-spacing wpex-w-100 wpex-clear\"><\/div>[vc_text_separator title=&#8221;4.0 &#8211; CONCLUSION&#8221; element_type=&#8221;div&#8221; span_color=&#8221;#008842&#8243;]<div class=\"vcex-spacing wpex-w-100 wpex-clear\"><\/div>[vc_row_inner][vc_column_inner][vc_column_text]Quality requirements and the respect for consumers drive Johnson&amp;Johnson to constantly seek innovations to make the production process more efficient and reliable. The electric and plant modernization continuity and the use of the online monitoring directly adhere to the predictive maintenance adopted as standard.<\/p>\n<p>This tool as an accessory to decision making has already changed the maintenance processes as well as the relationship between technical needs and plant production requirements. Based on the analysis of the supervised evolution of significant parameters of power transformer deterioration, the new routine allows better planning of corrective interventions.<\/p>\n<p>In fact, the teams who are responsible for keeping all system energized have what they need to take faster action, be more assertive and lower intervention costs.[\/vc_column_text]<div class=\"vcex-spacing wpex-w-100 wpex-clear\"><\/div>[\/vc_column_inner][\/vc_row_inner][vc_text_separator title=&#8221;5.0 &#8211; REFERENCES&#8221; element_type=&#8221;div&#8221; span_color=&#8221;#008842&#8243;]<div class=\"vcex-spacing wpex-w-100 wpex-clear\"><\/div>[vc_row_inner][vc_column_inner][vc_column_text]\n<ol>\n<li>ELECTRA, &#8220;An International Survey on Failures in Large Power Transformers in Service&#8221;, Paris, CIGRE, Ref. number 88 1983<\/li>\n<li>Ammon, Jorge Alves, Marcos, Vita, Andrew, Kastrup Filho, Oscar Ribeiro, Adolfo, et. al., &#8220;Sistema de Diagn\u00f3sticos para o Monitoramento de Subesta\u00e7\u00f5es de Alta Tens\u00e3o e o Gerenciamento das Atividades de Manuten\u00e7\u00e3o: Integra\u00e7\u00e3o e Aplica\u00e7\u00f5es&#8221; (&#8220;Diagnostic System for High Voltage Substation Monitoring and Maintenance Activity Management: Maintenance Management Activities: Integration and Applications &#8220;, X ERLAC &#8211; Latin American Regional Meeting of CIGR\u00c9, Puerto Iguazu, Argentina, 2003.<\/li>\n<li>Melo, Marcos A.C., Alves, Marcos, &#8220;Experi\u00eancia com Monitora\u00e7\u00e3o On-Line de Capacit\u00e2ncia e Tangente Delta de Buchas Condensivas&#8221; (&#8220;Experience with On-Line Monitoring and Tangent Delta Condensive Bushings&#8221;), XIX SNPTEE &#8211; National Seminar on Production and Transmission of Electric Power. Rio de Janeiro, Brazil, 2007.<\/li>\n<li>Alves, Marcos, Silva, Gilson, &#8220;Experi\u00eancia de Campo com Monitora\u00e7\u00e3o On-Line de um Transformador 343MVA 230kV, com 2 Comutadores sob Carga&#8221; &#8220;Experience in the Field with Online Monitoring of a 343 MVA 230kV Transformer with two OLTCs&#8221;, IV Workspot \u2013 Workshop on Power Transformers, Recife, Brazil, 2005.<\/li>\n<li>Alves, Marcos, Vasconcellos, Vagner, &#8220;Monitoramento da Umidade no \u00d3leo Isolante de Transformadores de Pot\u00eancia Visando o Aumento da Confiabilidade Operativa&#8221; (&#8220;Monitoring the Moisture in the Insulating Oil of Power Transformers to Increase the Operating Reliability&#8221;), V Workspot \u2013 Workshop on Power Transformers, Bel\u00e9m, Brazil, 2008.<\/li>\n<li>IEEE Guide for the Application of On-Line Monitoring to Liquid-Immersed Transformers \u2013 Draft 11<\/li>\n<li>Brazil (2014). Treetech Sistemas Digitais; SIGMA &#8211; Sistema Integrado de Gest\u00e3o e Monitoramento de Ativos [Asset Monitoring and Management Integrated System]<\/li>\n<\/ol>\n[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][\/vc_column][\/vc_row]\n<\/div>","protected":false},"excerpt":{"rendered":"<p>[vc_row][vc_column width=&#8221;2\/3&#8243;][vc_column_text] Abstract Electric power is a fundamental input for the industrial production of the Johnson&amp;Johnson plant in S\u00e3o Jos\u00e9 dos Campos-SP. Keeping the park operating correctly has always been a priority for the maintenance teams. The main substation, and specially the input transformer have always had a complete preventive maintenance program and their technology&hellip;<\/p>\n","protected":false},"author":1,"featured_media":6232,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[137],"tags":[],"class_list":["post-7516","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry","entry","has-media"],"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/treetech.com.br\/en\/wp-json\/wp\/v2\/posts\/7516","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/treetech.com.br\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/treetech.com.br\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/treetech.com.br\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/treetech.com.br\/en\/wp-json\/wp\/v2\/comments?post=7516"}],"version-history":[{"count":0,"href":"https:\/\/treetech.com.br\/en\/wp-json\/wp\/v2\/posts\/7516\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/treetech.com.br\/en\/wp-json\/wp\/v2\/media\/6232"}],"wp:attachment":[{"href":"https:\/\/treetech.com.br\/en\/wp-json\/wp\/v2\/media?parent=7516"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/treetech.com.br\/en\/wp-json\/wp\/v2\/categories?post=7516"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/treetech.com.br\/en\/wp-json\/wp\/v2\/tags?post=7516"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}