{"id":2204,"date":"2026-03-13T16:44:15","date_gmt":"2026-03-13T08:44:15","guid":{"rendered":"https:\/\/zmgs-global.com\/?p=2204"},"modified":"2026-04-03T17:15:41","modified_gmt":"2026-04-03T09:15:41","slug":"how-power-capacitor-connected-for-power-factor-improvement","status":"publish","type":"post","link":"https:\/\/zmgs-global.com\/ar\/how-power-capacitor-connected-for-power-factor-improvement.html","title":{"rendered":"How Power Capacitor Connected for Power Factor Improvement"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"2204\" class=\"elementor elementor-2204\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1ab85d8 e-flex e-con-boxed e-con e-parent\" data-id=\"1ab85d8\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-0260676 elementor-widget elementor-widget-text-editor\" data-id=\"0260676\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p class=\"ds-markdown-paragraph\">Standing in a electrical room full of switchgear can be intimidating. There are breakers, meters, and conduits running everywhere. Among all this hardware, the addition of a few gray boxes\u2014<a href=\"https:\/\/zmgs-global.com\/ar\/products\/high-voltage-power-capacitor\/\"><strong>power capacitors<\/strong><\/a>\u2014can seem deceptively simple. But how they are wired in makes all the difference. It\u2019s not just about slapping a capacitor on the wall and hoping for the best. The connection method determines whether the system actually achieves that sought-after power factor improvement or just sits there looking expensive.<\/p><p class=\"ds-markdown-paragraph\">The choice of connection usually comes down to the nature of the loads. Is the facility running one big motor all day, or are there dozens of small machines cycling on and off? The answer dictates whether the connection is direct, in a group, or part of an automatic bank. Getting it right means lower bills; getting it wrong can mean nuisance tripping or even equipment damage.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7461af0 elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"7461af0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"400\" height=\"400\" src=\"https:\/\/zmgs-global.com\/wp-content\/uploads\/2025\/12\/High-Voltage-Shunt-Power-Capacitor.webp\" class=\"attachment-full size-full wp-image-1593\" alt=\"\u0645\u0643\u062b\u0641 \u0637\u0627\u0642\u0629 \u0639\u0627\u0644\u064a \u0627\u0644\u062c\u0647\u062f\" srcset=\"https:\/\/zmgs-global.com\/wp-content\/uploads\/2025\/12\/High-Voltage-Shunt-Power-Capacitor.webp 400w, https:\/\/zmgs-global.com\/wp-content\/uploads\/2025\/12\/High-Voltage-Shunt-Power-Capacitor-150x150.webp 150w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9ed7fe9 elementor-widget elementor-widget-heading\" data-id=\"9ed7fe9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u062c\u062f\u0648\u0644 \u0627\u0644\u0645\u062d\u062a\u0648\u064a\u0627\u062a<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/zmgs-global.com\/ar\/how-power-capacitor-connected-for-power-factor-improvement.html\/#Individual_Connection\" >Individual Connection<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/zmgs-global.com\/ar\/how-power-capacitor-connected-for-power-factor-improvement.html\/#Group_Connection\" >Group Connection<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/zmgs-global.com\/ar\/how-power-capacitor-connected-for-power-factor-improvement.html\/#Automatic_Connection\" >Automatic Connection<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/zmgs-global.com\/ar\/how-power-capacitor-connected-for-power-factor-improvement.html\/#Safety_and_Installation_Considerations\" >Safety and Installation Considerations<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/zmgs-global.com\/ar\/how-power-capacitor-connected-for-power-factor-improvement.html\/#FAQ\" >\u0627\u0644\u0623\u0633\u0626\u0644\u0629 \u0627\u0644\u0634\u0627\u0626\u0639\u0629<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"Individual_Connection\"><\/span>Individual Connection<span class=\"ez-toc-section-end\"><\/span><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a730fe1 elementor-widget elementor-widget-text-editor\" data-id=\"a730fe1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p class=\"ds-markdown-paragraph\">This is about as straightforward as it gets. A capacitor is connected directly to the terminals of a specific piece of equipment, usually a large induction motor. The wiring typically runs from the motor starter&#8217;s load side right to the capacitor unit. The idea is to switch the capacitor on and off simultaneously with the motor.<\/p><ul><li><p class=\"ds-markdown-paragraph\"><strong>Why do it?<\/strong>\u00a0It provides correction exactly where the reactive power is needed.<\/p><\/li><li><p class=\"ds-markdown-paragraph\"><strong>Where is it used?<\/strong>\u00a0Large motors that run for long periods, like pumps, fans, or compressors.<\/p><\/li><\/ul><p class=\"ds-markdown-paragraph\">There is a practical rule of thumb here. The capacitor should be connected on the load side of the motor starter, but ahead of the motor overload relays. This is important because the capacitor reduces the current flowing through the lines, and if it were placed after the overloads, it could trick the heater elements into thinking the motor is running cooler than it actually is. That\u2019s a safety hazard.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bb35aca elementor-widget elementor-widget-heading\" data-id=\"bb35aca\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Sizing for Individual Motors<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a47919a elementor-widget elementor-widget-text-editor\" data-id=\"a47919a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>The math isn&#8217;t too painful. The goal is to reduce the reactive current drawn from the supply, not to over-correct the motor. Typically, the capacitor kVAR (kilovar) rating is chosen to be about 90-95% of the motor&#8217;s magnetizing current. This brings the power factor improvement to around 95% lagging, which is the sweet spot. Going to 100% (unity) risks self-excitation when the motor is switched off, which can cause voltage spikes. It\u2019s a fine line, but an important one.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-aa0be04 elementor-widget elementor-widget-heading\" data-id=\"aa0be04\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"Group_Connection\"><\/span>Group Connection<span class=\"ez-toc-section-end\"><\/span><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-37a03a6 elementor-widget elementor-widget-text-editor\" data-id=\"37a03a6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<div class=\"ds-message _63c77b1\"><div class=\"ds-markdown\"><p class=\"ds-markdown-paragraph\">Sometimes, connecting a capacitor to every single motor is impractical. There might be dozens of small motors, or the loads might be spread out over a large facility. In that case, a group connection makes more sense. A single <a href=\"https:\/\/zmgs-global.com\/ar\/products\/low-voltage-power-capacitor\/\"><strong>low voltage power capacitor<\/strong> <\/a>bank\u2014or a bank of several steps\u2014is connected to a main distribution bus, feeding a whole section of the factory.<\/p><p class=\"ds-markdown-paragraph\">This method is less about perfect, localized correction and more about improving the overall system. The bank of low voltage power capacitors supplies the reactive power for everything downstream. It\u2019s cheaper to install than multiple individual units, and it requires less maintenance overall. However, it doesn&#8217;t reduce losses in the branch feeders running to the individual motors, because the reactive current still travels through those smaller wires.<\/p><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d80ef5a elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"d80ef5a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"800\" height=\"800\" src=\"https:\/\/zmgs-global.com\/wp-content\/uploads\/2025\/11\/27.webp\" class=\"attachment-full size-full wp-image-1391\" alt=\"\u0645\u0643\u062b\u0641 \u0627\u0644\u0637\u0627\u0642\u0629\" srcset=\"https:\/\/zmgs-global.com\/wp-content\/uploads\/2025\/11\/27.webp 800w, https:\/\/zmgs-global.com\/wp-content\/uploads\/2025\/11\/27-150x150.webp 150w, https:\/\/zmgs-global.com\/wp-content\/uploads\/2025\/11\/27-768x768.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7afdd7d elementor-widget elementor-widget-heading\" data-id=\"7afdd7d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"Automatic_Connection\"><\/span>Automatic Connection<span class=\"ez-toc-section-end\"><\/span><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-097beb8 elementor-widget elementor-widget-text-editor\" data-id=\"097beb8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p class=\"ds-markdown-paragraph\">Now, here\u2019s where it gets a bit more sophisticated. If a facility has loads that come and go throughout the day\u2014say, a welding shop or a manufacturing line with multiple shifts\u2014a fixed group bank won&#8217;t cut it. If the load drops, a fixed bank will over-correct, sending the power factor into a leading (capacitive) territory, which can be just as problematic as a lagging one.<\/p><p class=\"ds-markdown-paragraph\">An automatic connection solves this. It uses a power factor controller (a small microprocessor) that constantly monitors the system. When the power factor drops below a set threshold, the controller switches on smaller capacitor steps one by one.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c9ac5ca elementor-widget elementor-widget-heading\" data-id=\"c9ac5ca\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">How the Automatic Bank is Wired<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-46d1f71 elementor-widget elementor-widget-text-editor\" data-id=\"46d1f71\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p class=\"ds-markdown-paragraph\">The wiring here is more involved than a simple individual connection. It requires:<\/p><ol start=\"1\"><li><p class=\"ds-markdown-paragraph\"><strong>A Current Transformer (CT):<\/strong>\u00a0This senses the current on the main incoming lines and sends a signal to the controller.<\/p><\/li><li><p class=\"ds-markdown-paragraph\"><strong>The Controller:<\/strong>\u00a0The brain of the operation. It reads the CT signal and decides if more capacitance is needed.<\/p><\/li><li><p class=\"ds-markdown-paragraph\"><strong>Contactor Steps:<\/strong>\u00a0For each capacitor stage, there is a contactor that the controller energizes to connect that stage to the bus.<\/p><\/li><li><p class=\"ds-markdown-paragraph\"><strong>Detuning Reactors (Often):<\/strong>\u00a0In modern systems, reactors are wired in series with the capacitors to protect against harmonic currents from VFDs.<\/p><\/li><\/ol><p class=\"ds-markdown-paragraph\">It\u2019s a neat setup. When a big machine kicks on, the power factor dips, and the controller responds within seconds, clicking in another stage of capacitors to bring it back up. It\u2019s a dynamic process, constantly adjusting.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-eace5ae elementor-widget elementor-widget-heading\" data-id=\"eace5ae\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"Safety_and_Installation_Considerations\"><\/span>Safety and Installation Considerations<span class=\"ez-toc-section-end\"><\/span><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3b0172c elementor-widget elementor-widget-text-editor\" data-id=\"3b0172c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p class=\"ds-markdown-paragraph\">Regardless of the connection type chosen, some universal rules apply. Capacitors store energy. Even when the power is off, a capacitor bank can hold a lethal charge. Therefore, discharge devices (usually resistors) must be connected across the terminals to bleed the voltage down to safe levels within a few minutes.<\/p><p class=\"ds-markdown-paragraph\">Also, fusing is critical. Capacitors can fail, and when they do, they need to be isolated quickly to prevent a cascading failure or a fire. High-rupture-capacity (HRC) fuses are standard practice. And finally, the connecting cables must be rated for the capacitive current, which can be higher than the simple resistive current due to the leading nature of the load.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-912db46 elementor-widget elementor-widget-heading\" data-id=\"912db46\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"FAQ\"><\/span>\u0627\u0644\u0623\u0633\u0626\u0644\u0629 \u0627\u0644\u0634\u0627\u0626\u0639\u0629<span class=\"ez-toc-section-end\"><\/span><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ddfe870 elementor-widget elementor-widget-n-accordion\" data-id=\"ddfe870\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;default_state&quot;:&quot;expanded&quot;,&quot;max_items_expended&quot;:&quot;one&quot;,&quot;n_accordion_animation_duration&quot;:{&quot;unit&quot;:&quot;ms&quot;,&quot;size&quot;:400,&quot;sizes&quot;:[]}}\" data-widget_type=\"nested-accordion.default\">\n\t\t\t\t\t\t\t<div class=\"e-n-accordion\" aria-label=\"\u0627\u0644\u0623\u0643\u0648\u0631\u062f\u064a\u0648\u0646. \u0627\u0641\u062a\u062d \u0627\u0644\u0631\u0648\u0627\u0628\u0637 \u0628\u0627\u0633\u062a\u062e\u062f\u0627\u0645 Enter \u0623\u0648 \u0627\u0644\u0645\u0633\u0627\u0641\u0629\u060c \u0648\u0623\u063a\u0644\u0642\u0647\u0627 \u0628\u0627\u0633\u062a\u062e\u062f\u0627\u0645 Escape\u060c \u0648\u062a\u0646\u0642\u0644 \u0628\u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0645\u0641\u0627\u062a\u064a\u062d \u0627\u0644\u0623\u0633\u0647\u0645\">\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-2320\" class=\"e-n-accordion-item\" open>\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"1\" tabindex=\"0\" aria-expanded=\"true\" aria-controls=\"e-n-accordion-item-2320\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> Can a power capacitor be connected to any motor? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-2320\" class=\"elementor-element elementor-element-4339a20 e-con-full e-flex e-con e-child\" data-id=\"4339a20\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a9a8724 elementor-widget elementor-widget-text-editor\" data-id=\"a9a8724\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Generally yes, but the motor must be compatible. Motors that are switched on and off frequently (like crane motors or jogging applications) are not ideal for fixed capacitors because the discharge time might not be sufficient, causing high inrush currents. Also, motors controlled by VFDs usually should not have standard capacitors connected to their output; they require harmonic filters instead.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-2321\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"2\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-2321\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> Why does the power capacitor need to be on the load side of the overload relay? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-2321\" class=\"elementor-element elementor-element-7d955fd e-con-full e-flex e-con e-child\" data-id=\"7d955fd\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-9f331db elementor-widget elementor-widget-text-editor\" data-id=\"9f331db\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>It\u2019s for protection. The capacitor reduces the line current. If the capacitor is placed\u00a0<em>after<\/em>\u00a0the overload relay, the relay will see a lower current than the motor is actually drawing. In an overload condition, the motor could overheat while the relay, fooled by the lower current, fails to trip. Placing it before the relay ensures the relay sees the true motor current.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-2322\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"3\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-2322\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> What happens if a power capacitor bank is left connected when the load is turned off? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-2322\" class=\"elementor-element elementor-element-bd4af50 e-con-full e-flex e-con e-child\" data-id=\"bd4af50\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7adb3cf elementor-widget elementor-widget-text-editor\" data-id=\"7adb3cf\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>If it&#8217;s a fixed bank on a dedicated feeder, and the feeder is still energized, the bank will continue to supply leading current back into the system. This can cause a voltage rise on the bus, which is potentially damaging to other equipment that is still online. This is why automatic controllers are essential for variable loads, and why individual banks are usually switched with the motor itself.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"Standing in a electrical room full of switchgear can be intimidating. There are breakers, meters, and conduits running everywhere. Among all this hardware, the addition of a few gray boxes\u2014power capacitors\u2014can seem deceptively simple. But how they are wired in makes all the difference. It\u2019s not just about slapping a capacitor on the wall and [&hellip;]","protected":false},"author":8,"featured_media":1597,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[47],"tags":[55],"class_list":["post-2204","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge","tag-power-capacitor"],"acf":[],"_links":{"self":[{"href":"https:\/\/zmgs-global.com\/ar\/wp-json\/wp\/v2\/posts\/2204","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zmgs-global.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/zmgs-global.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/zmgs-global.com\/ar\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/zmgs-global.com\/ar\/wp-json\/wp\/v2\/comments?post=2204"}],"version-history":[{"count":0,"href":"https:\/\/zmgs-global.com\/ar\/wp-json\/wp\/v2\/posts\/2204\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/zmgs-global.com\/ar\/wp-json\/wp\/v2\/media\/1597"}],"wp:attachment":[{"href":"https:\/\/zmgs-global.com\/ar\/wp-json\/wp\/v2\/media?parent=2204"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zmgs-global.com\/ar\/wp-json\/wp\/v2\/categories?post=2204"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zmgs-global.com\/ar\/wp-json\/wp\/v2\/tags?post=2204"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}