{"id":2621,"date":"2026-11-06T10:22:51","date_gmt":"2026-11-06T02:22:51","guid":{"rendered":"https:\/\/www.zishengelectric.com\/?post_type=product&#038;p=2621"},"modified":"2026-11-06T11:34:55","modified_gmt":"2026-11-06T03:34:55","slug":"15kva-single-phase-pad-mounted-transformer","status":"publish","type":"product","link":"https:\/\/www.zishengelectric.com\/ar\/product\/15kva-single-phase-pad-mounted-transformer","title":{"rendered":"15kVA Single Phase Pad Mounted Transformer"},"content":{"rendered":"<h2>Key Features<\/h2>\n<ul>\n<li>15kVA Single-Phase Underground Supply<\/li>\n<li>Radial or Loop Feed Configuration<\/li>\n<li>Copper or Aluminum Winding Options<\/li>\n<li>Project-Matched Cable and Protection Interfaces<\/li>\n<\/ul>\n<figure><img loading=\"lazy\" decoding=\"async\" style=\"display: block; max-width: 100%; height: auto;\" title=\"Single-Phase Pad-Mounted Transformer Open Compartment\" src=\"https:\/\/www.zishengelectric.com\/wp-content\/uploads\/2026\/11\/single-phase-pad-mounted-transformer-workshop-16x9-1.jpg\" alt=\"Green single-phase pad-mounted transformer with an open cable compartment on a gray workshop floor\" width=\"1200\" height=\"675\" \/><\/figure>\n<h2>Product Overview<\/h2>\n<p>The 15kVA single phase pad mounted transformer provides a ground-level supply point for underground distribution. It is intended for compatible single-phase residential, small commercial and local utility loads. Zisheng Electric can review the service voltage, cable interfaces and site conditions against your procurement specification.<\/p>\n<p>A 15kVA rating describes apparent power, not a guaranteed 15kW usable load in every application. Establish diversified demand, power factor, motor-starting current and future expansion before approving capacity.<\/p>\n<h2>Design and Installation<\/h2>\n<div style=\"width: 100%; aspect-ratio: 16 \/ 9; background: #fff; overflow: hidden;\"><img decoding=\"async\" style=\"display: block; width: 100%; height: auto;\" title=\"Single-Phase Pad-Mounted Transformer Terminal Compartment\" src=\"https:\/\/www.zishengelectric.com\/wp-content\/uploads\/2026\/11\/single-phase-pad-mounted-transformer-terminal-compartment-background-extended-16x9-1.jpg\" alt=\"Open single-phase pad-mounted transformer terminal compartment with high-voltage bushings and low-voltage spade terminals\" \/><\/div>\n<p>The enclosed tank and cable compartment sit on an engineered foundation. Confirm base dimensions, cable entry openings, conduit positions and door access before concrete work begins. Allow working clearance for authorized utility personnel and keep the installation accessible for lifting and replacement.<\/p>\n<p>Radial feed serves a terminal supply point. Loop feed provides additional primary cable interfaces for an incoming and outgoing circuit; switching and isolation capability depend on the actual equipment supplied. Neither arrangement establishes protection selectivity by itself. Specify dead-front termination interfaces, connector ratings and the utility grounding arrangement.<\/p>\n<h2>Core and Windings<\/h2>\n<p>The magnetic core and winding assembly must suit the selected frequency, voltage ratio and loss requirements. Copper or aluminum windings can be reviewed as alternatives. The purchase specification should identify the conductor material and guaranteed electrical performance rather than assuming that material alone determines efficiency.<\/p>\n<h2>Insulation and Cooling<\/h2>\n<p>ONAN means Oil Natural Air Natural: oil circulates naturally inside the tank and heat dissipates to surrounding air without fans. Mineral oil is the fluid option. Natural ester requires confirmation of the insulation system, temperature limits and applicable cooling designation. Alternative cooling codes should not be treated as interchangeable accessories.<\/p>\n<p>BIL means Basic Impulse Insulation Level. It describes lightning impulse withstand and must be coordinated with the winding voltage, connectors and surge protection. Select the high-voltage and low-voltage insulation levels separately.<\/p>\n<h2>Environmental Conditions<\/h2>\n<p>Provide installation altitude, minimum and maximum ambient temperature, solar exposure, humidity, pollution and corrosion conditions. Higher altitude or demanding thermal conditions may require a revised design or rating assessment. Coastal locations require review of coating, enclosure material and external fittings. Evaluate flooding, drainage and foundation elevation at the site.<\/p>\n<h2>Standards and Customization<\/h2>\n<p>Identify the applicable IEEE\/ANSI, CSA or IEC requirements in the enquiry, together with local utility specifications and any mandatory efficiency rule. Compliance, listing and certification are separate requirements and must be supported by documents covering the offered design.<\/p>\n<p>Confirm rated voltage and frequency, winding polarity, primary taps, feed arrangement, insulating fluid, enclosure finish, fuse coordination and monitoring accessories in the approved schedule. An off-circuit tap changer requires de-energization and isolation before adjustment; do not assume on-load tap changing.<\/p>\n<h2>Case 1. Residential Underground Distribution<\/h2>\n<h3>Project Background<\/h3>\n<p>The residential distribution design calls for a compact ground-level transformer connected to an underground medium-voltage feeder. The service supplies household lighting, appliances and small air-conditioning equipment through a 120\/240V single-phase network.<\/p>\n<p>The principal requirements are enclosed cable connections, access for authorized utility personnel, compatible protection and a foundation layout coordinated with underground conduits.<\/p>\n<h3>Transformer Configuration<\/h3>\n<table>\n<thead>\n<tr>\n<th>Parameter<\/th>\n<th>Configuration<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Rated capacity<\/td>\n<td>15 kVA<\/td>\n<\/tr>\n<tr>\n<td>Phase<\/td>\n<td>Single phase<\/td>\n<\/tr>\n<tr>\n<td>Primary system<\/td>\n<td>12,470Y\/7,200 V grounded wye<\/td>\n<\/tr>\n<tr>\n<td>Primary winding voltage<\/td>\n<td>7,200 V, phase-to-neutral<\/td>\n<\/tr>\n<tr>\n<td>Secondary service<\/td>\n<td>120\/240 V, three-wire split-phase<\/td>\n<\/tr>\n<tr>\n<td>Frequency<\/td>\n<td>60 Hz<\/td>\n<\/tr>\n<tr>\n<td>Primary feed<\/td>\n<td>Radial feed<\/td>\n<\/tr>\n<tr>\n<td>Cooling<\/td>\n<td>ONAN \u2014 natural oil circulation and natural air cooling<\/td>\n<\/tr>\n<tr>\n<td>Installation<\/td>\n<td>Outdoor concrete pad with underground cable entry<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>Cable and Protection Interfaces<\/h3>\n<p>The electrical design coordinates primary connectors, fuse characteristics, surge protection and grounding with the utility supply. Secondary conductor sizing accounts for service length, load demand and voltage drop. Motor starting and future electric heating or vehicle charging are reviewed separately from steady-state demand.<\/p>\n<div style=\"width: 100%; aspect-ratio: 16 \/ 9; background: #fff; overflow: hidden;\"><img loading=\"lazy\" decoding=\"async\" style=\"display: block; width: 100%; height: auto;\" title=\"Single-Phase Pad-Mounted Transformer Terminal Compartment\" src=\"https:\/\/www.zishengelectric.com\/wp-content\/uploads\/2026\/11\/single-phase-pad-mounted-transformer-terminal-compartment-background-extended-16x9-1.jpg\" alt=\"Open single-phase pad-mounted transformer terminal compartment with high-voltage bushings and low-voltage terminals\" width=\"1200\" height=\"675\" \/><\/div>\n<h3>Foundation and Installation<\/h3>\n<p>The foundation drawing aligns the cabinet base and cable entry openings with the underground conduit route. The installation layout allows door opening, cable bending, drainage and lifting access. The service neutral and grounding connections follow the approved electrical arrangement.<\/p>\n<h3>Inspection and Delivery<\/h3>\n<p>The procurement plan includes review of winding resistance, ratio and polarity, no-load loss and current, load loss and impedance, applicable dielectric tests and tank tightness. Acceptance uses the approved drawings, nameplate schedule and traceable factory test records.<\/p>\n<p>Timber supports restrain the transformer through approved structural points. Bushings, terminals and projecting fittings remain clear of packing members. Before energization, the site team checks shipment condition, cable terminations, grounding continuity and the protection arrangement.<\/p>\n<div style=\"width: 100%; aspect-ratio: 16 \/ 9; background: #fff; overflow: hidden;\"><img loading=\"lazy\" decoding=\"async\" style=\"display: block; width: 100%; height: auto;\" title=\"Single-Phase Pad-Mounted Transformers on Pallets\" src=\"https:\/\/www.zishengelectric.com\/wp-content\/uploads\/2026\/11\/single-phase-pad-mounted-transformers-pallets-background-extended-16x9-1.jpg\" alt=\"Single-phase pad-mounted transformers with open cable compartments standing on timber pallets\" width=\"1200\" height=\"675\" \/><\/div>","protected":false},"excerpt":{"rendered":"<p>The 15kVA single phase pad mounted transformer from Zisheng Electric is intended for underground distribution serving residential properties, small commercial premises and compatible single-phase utility loads. The ground-level cabinet provides an enclosed cable termination area and mounts on a prepared foundation. Specify the primary connection and voltage, required secondary service and operating frequency before selecting the configuration. Copper or aluminum windings, radial or loop feed arrangements and project-specific protection can be reviewed with the enquiry. Mineral oil with ONAN natural cooling is available; alternative insulating fluids require a matched design. Load demand, motor starting, installation altitude, ambient conditions and utility requirements determine suitability. Final electrical ratings, accessories and installation dimensions are subject to the approved technical schedule.<\/p>","protected":false},"featured_media":2622,"template":"","meta":{"themepark_post_bcolor":"#f5f5f5","themepark_post_width":"1022px","themepark_post_img":"","themepark_post_img_po":"left","themepark_post_img_re":false,"themepark_post_img_cover":false,"themepark_post_img_fixed":false,"themepark_post_hide_title":false,"themepark_post_main_b":"","themepark_post_main_p":100,"themepark_paddingblock":false},"product_brand":[],"product_cat":[73],"product_tag":[],"class_list":["post-2621","product","type-product","status-publish","has-post-thumbnail","product_cat-pad-mounted-transformer","first","instock","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/www.zishengelectric.com\/ar\/wp-json\/wp\/v2\/product\/2621","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.zishengelectric.com\/ar\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.zishengelectric.com\/ar\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.zishengelectric.com\/ar\/wp-json\/wp\/v2\/media\/2622"}],"wp:attachment":[{"href":"https:\/\/www.zishengelectric.com\/ar\/wp-json\/wp\/v2\/media?parent=2621"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.zishengelectric.com\/ar\/wp-json\/wp\/v2\/product_brand?post=2621"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.zishengelectric.com\/ar\/wp-json\/wp\/v2\/product_cat?post=2621"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.zishengelectric.com\/ar\/wp-json\/wp\/v2\/product_tag?post=2621"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}