{"id":44893,"date":"2026-10-26T10:12:53","date_gmt":"2026-10-26T09:12:53","guid":{"rendered":"https:\/\/fvcomponentes.com\/?post_type=product&#038;p=44893"},"modified":"2026-10-26T12:27:51","modified_gmt":"2026-10-26T11:27:51","slug":"single-phase-transformer-with-neutral-125-kva-230-230-v-with-ip23-enclosure-for-two-phase-networks","status":"publish","type":"product","link":"https:\/\/fvcomponentes.com\/en\/producto\/transformador-monofasico-generador-de-neutro-125-kva-230-230vn-con-caja-ip23-redes-bifasicas\/","title":{"rendered":"12.5 kVA 230\/230V+N single-phase transformer with neutral generator and IP23 enclosure \u2013 two-phase networks"},"content":{"rendered":"<h2>12.5 kVA neutral-generating transformer \u2013 FVC-TRAN12500<\/h2>\n<p>In many homes and industrial premises in Spain, the service connection is still a <strong>biphasic network<\/strong>: there are two phases, and between them there is 230 V, but <strong>there is no neutral<\/strong> nor a conductor earthed. Grid-connected photovoltaic inverters, hybrid systems and inverter\/chargers require a phase and a neutral, and many also check that the neutral is earthed. When connected directly to a two-phase grid, they will display an insulation, neutral or earth fault error and will not start up.<\/p>\n<p>This <strong>isolation transformer with neutral generator<\/strong> It solves the problem: it takes the 230 V between phases from the two-phase mains supply and outputs 230 V at its secondary terminal, with a neutral (N) terminal that is connected to the installation\u2019s earth. The inverter thus sees a conventional single-phase phase-neutral mains supply, with the neutral referenced to earth.<\/p>\n<h3>When you need it<\/h3>\n<ul>\n<li>Self-consumption installations in homes with a two-phase electricity supply (common in old town centres and rural areas).<\/li>\n<li>Hybrid inverters and inverter\/chargers that require a neutral point earthed.<\/li>\n<li>When you want galvanic isolation between the mains supply and the installation.<\/li>\n<\/ul>\n<h3>How to choose the power rating<\/h3>\n<p>Choose a transformer with a power rating equal to or greater than the maximum AC power that will pass through it: the inverter\u2019s rated power and, in the case of hybrid systems or inverter\/chargers, also the power drawn from the mains to charge batteries and supply loads. This 12.5 kVA model can handle around 54.3 A continuous at 230 V. If you are unsure between two sizes, choose the larger one.<\/p>\n<h3>Technical specifications<\/h3>\n<table>\n<tbody>\n<tr>\n<td>Model<\/td>\n<td>TRAN12500<\/td>\n<\/tr>\n<tr>\n<td>Rated power<\/td>\n<td>12.5 kVA (12,500 VA)<\/td>\n<\/tr>\n<tr>\n<td>Rated current at 230 V<\/td>\n<td>54.3 A<\/td>\n<\/tr>\n<tr>\n<td>Input voltage<\/td>\n<td>230 VAC<\/td>\n<\/tr>\n<tr>\n<td>Output voltage<\/td>\n<td>230 Vac + N<\/td>\n<\/tr>\n<tr>\n<td>Type<\/td>\n<td>Dry, single-phase, insulated<\/td>\n<\/tr>\n<tr>\n<td>Electrostatic screen<\/td>\n<td>Yes (must be earthed)<\/td>\n<\/tr>\n<tr>\n<td>Frequency<\/td>\n<td>50\/60 Hz<\/td>\n<\/tr>\n<tr>\n<td>Degree of protection<\/td>\n<td>IP23 (indoor installation)<\/td>\n<\/tr>\n<tr>\n<td>Thermal insulation class<\/td>\n<td>F (155 \u00b0C)<\/td>\n<\/tr>\n<tr>\n<td>Thermal class of windings<\/td>\n<td>HC (200 \u00b0C)<\/td>\n<\/tr>\n<tr>\n<td>Varnishing<\/td>\n<td>Yes<\/td>\n<\/tr>\n<tr>\n<td>Refrigeration<\/td>\n<td>ANAN (air-dried)<\/td>\n<\/tr>\n<tr>\n<td>Insulation test<\/td>\n<td>4 kV<\/td>\n<\/tr>\n<tr>\n<td>Ambient temperature<\/td>\n<td>&lt; 40 \u00b0C<\/td>\n<\/tr>\n<tr>\n<td>Working altitude<\/td>\n<td>\u2264 1,000 metres above sea level.<\/td>\n<\/tr>\n<tr>\n<td>Dimensions (A \u00d7 B \u00d7 C)<\/td>\n<td>480 \u00d7 350 \u00d7 540 mm (mounting distance D: 305 mm)<\/td>\n<\/tr>\n<tr>\n<td>Weight<\/td>\n<td>65 kg<\/td>\n<\/tr>\n<tr>\n<td>Regulations<\/td>\n<td>EN 61558-2-4 \u00b7 REACH and RoHS<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>Installation<\/h3>\n<ul>\n<li>Mains: the two phases of the two-phase circuit (230 V between them), protected by its circuit breaker.<\/li>\n<li>Secondary: phase and neutral to the inverter; the secondary N terminal is connected to the installation earth to establish the neutral reference.<\/li>\n<li>The electrostatic screen must always be earthed.<\/li>\n<li>IP23 unit: install indoors, in a dry, well-ventilated place, leaving space around it to allow for natural cooling.<\/li>\n<li>Installation must be carried out by an authorised installer in accordance with the REBT.<\/li>\n<\/ul>\n<p>Not sure what power rating you need, or whether your network is two-phase? Drop us a line with your inverter model and we\u2019ll help you choose.<\/p>","protected":false},"excerpt":{"rendered":"<ul>\n<li><strong>Power:<\/strong> 12.5 kVA (12,500 VA) \u00b7 54.3 A at 230 V<\/li>\n<li><strong>Entry:<\/strong> 230 Vac between phases (two-phase mains supply without a neutral)<\/li>\n<li><strong>Exit:<\/strong> 230 Vac + N, neutral connectable to earth<\/li>\n<li>Dry-type, galvanic isolation and electrostatic shielding<\/li>\n<li>It allows the connection of grid-tied and hybrid inverters that require a phase and neutral<\/li>\n<li>Dimensions 480\u00d7350\u00d7540 mm \u00b7 65 kg \u00b7 IP23 \u00b7 EN 61558-2-4<\/li>\n<\/ul>","protected":false},"featured_media":44895,"comment_status":"open","ping_status":"closed","template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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