{"id":1755,"date":"2026-08-14T11:49:22","date_gmt":"2026-08-14T03:49:22","guid":{"rendered":"https:\/\/www.zishengelectric.com\/?post_type=product&p=1755"},"modified":"2026-11-10T15:29:21","modified_gmt":"2026-11-10T07:29:21","slug":"110kv-115kv-power-transformer","status":"publish","type":"product","link":"https:\/\/www.zishengelectric.com\/es\/product\/110kv-115kv-power-transformer","title":{"rendered":"110kV 115kV Power Transformer"},"content":{"rendered":"

110kV 115kV Power Transformer for Grid and Substation Duty<\/h2>\n

The 110kV \/ 115kV Power Transformer is a three-phase, high-voltage oil-immersed transformer designed for power transmission, substation and large-scale industrial applications.<\/p>\n

It is used to step up or step down electrical energy between high-voltage transmission networks and medium-voltage systems. Rated capacity, voltage ratio, impedance, vector group, tap range, cooling system and insulation level are selected for the project requirements and installation conditions.<\/p>\n

\"Oil-immersed<\/figure>\n

Core, Windings and Oil-Paper Insulation<\/h3>\n

The active assembly combines the magnetic core, insulated windings, leads and supporting structures inside an oil-filled tank. Core material, copper or aluminum windings, insulation clearances and mechanical bracing are selected for the agreed loss, dielectric, thermal and short-circuit requirements. Final material grades and construction details follow the approved design.<\/p>\n

\"Technicians<\/figure>\n

Tank, Bushings and Cooling Equipment<\/h3>\n

Bushings provide the external winding connections. Radiators or cooler banks transfer heat from the insulating liquid to air. ONAN uses natural oil and air circulation; ONAF adds forced air; OFAF uses forced oil and air; ODAF uses directed oil circulation with forced air. The cooling-stage ratings, fans, pumps and control supply are defined in the accessory and cooling schedule.<\/p>\n

Conservator or sealed-tank arrangements, tap-changing equipment, oil valves, temperature indication and protective devices are coordinated with the tank design and installation. A Buchholz relay applies to suitable conservator arrangements and should not be presented as universal equipment on every tank type. Online monitoring, remote communication and additional sensors are options unless included in the purchase specification.<\/p>\n

Product Cases<\/h2>\n

Case 1: 110\/33kV Substation Capacity Expansion<\/h3>\n

The project requirement is an additional three-phase transformer bay supplying mixed distribution feeders and industrial motor loads. Daily load variation, motor starting and a restricted outage window make voltage regulation, existing-bus interfaces and installation sequencing central to selection.<\/p>\n

\"Aerial<\/figure>\n

Selection starts with the feeder demand study, future load allowance and the required operating arrangement. If parallel operation is intended, the existing transformer ratio, vector group, impedance, tap positions and protection settings must be reviewed together. The chosen MVA and cooling stages must meet the continuous and contingency duties without treating the capacity range as a default order rating.<\/p>\n\n\n\n\n\n\n\n\n
Project interface<\/th>\nConfiguration and acceptance requirement<\/th>\n<\/tr>\n<\/thead>\n
Electrical connection<\/td>\n110\/33kV, three-phase; MVA, vector group, impedance and neutral arrangement defined by the approved system study.<\/td>\n<\/tr>\n
Existing substation<\/td>\nCheck foundation load, bushing position, busbar clearances, oil containment and crane access against the final general arrangement.<\/td>\n<\/tr>\n
Voltage control<\/td>\nCoordinate tap operation and parallel control with the existing transformer and utility voltage policy.<\/td>\n<\/tr>\n
Release and energization<\/td>\nReview serial-numbered test reports, approved drawings, alarm\/trip functions and receiving records before the agreed site commissioning checks.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\"Oil-immersed<\/figure>\n

The key engineering issue is compatibility with the operating substation. Approval should resolve busbar alignment and parallel-load-sharing requirements before manufacture; receiving inspection and installation records then provide the link between factory release and site energization.<\/p>\n

Case 2: 115\/34.5kV Solar and Battery Storage Grid Connection<\/h3>\n

The grid connection links a 34.5kV collector system to a 115kV network. Solar generation, battery charging and discharging, auxiliary demand and reactive-power support create several operating conditions rather than one constant export load.<\/p>\n

\"Aerial<\/figure>\n

The transformer is selected from the complete three-phase apparent-power envelope. For balanced operation, S = \u221a(P\u00b2 + Q\u00b2), using consistent MW, MVAr and MVA units. Solar and battery nameplate MW values alone do not establish the required transformer MVA; simultaneous operating limits, inverter harmonics, ambient conditions and the utility interconnection study also matter.<\/p>\n\n\n\n\n\n\n\n\n\n
Project interface<\/th>\nConfiguration and acceptance requirement<\/th>\n<\/tr>\n<\/thead>\n
Voltage arrangement<\/td>\n115\/34.5kV; confirm winding connection, neutral earthing, highest equipment voltage and insulation coordination.<\/td>\n<\/tr>\n
Operating envelope<\/td>\nEvaluate export, charging\/import, reactive support and permitted simultaneous operation against the agreed continuous and thermal duty.<\/td>\n<\/tr>\n
Control coordination<\/td>\nCoordinate OLTC settings with plant voltage control; define command priority, remote signals and operating limits.<\/td>\n<\/tr>\n
Factory evidence<\/td>\nAgree the dielectric schedule, loss and impedance acceptance, cooling-control checks and traceable report package.<\/td>\n<\/tr>\n
Site constraints<\/td>\nConfirm access road limits, crane position, detached accessory installation, oil handling and containment before delivery.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\"Power<\/figure>\n

The key engineering issue is coordination between the transformer, inverter plant controller and grid requirements. Acceptance focuses on the approved operating envelope, protection and control interfaces, and the documented transition from factory test release to site checks.<\/p>\n

Related Product Range<\/h3>\n

For projects with a different grid voltage, compare the 220kV \/ 230kV power transformer<\/a> range. Select the nominal voltage and insulation requirements from the utility specification.<\/p>","protected":false},"excerpt":{"rendered":"

The 110kV \/ 115kV Power Transformer is a three-phase, high-voltage oil-immersed transformer designed for power transmission, substation and large-scale industrial applications.<\/p>\n

It is used to step up or step down electrical energy between high-voltage transmission networks and medium-voltage systems. Rated capacity, voltage ratio, impedance, vector group, tap range, cooling system and insulation level are selected for the project requirements and installation conditions.<\/p>\n

 <\/p>","protected":false},"featured_media":2700,"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":[71],"product_tag":[],"class_list":["post-1755","product","type-product","status-publish","has-post-thumbnail","product_cat-oil-immersed-transformer","first","instock","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/www.zishengelectric.com\/es\/wp-json\/wp\/v2\/product\/1755","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.zishengelectric.com\/es\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.zishengelectric.com\/es\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.zishengelectric.com\/es\/wp-json\/wp\/v2\/media\/2700"}],"wp:attachment":[{"href":"https:\/\/www.zishengelectric.com\/es\/wp-json\/wp\/v2\/media?parent=1755"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.zishengelectric.com\/es\/wp-json\/wp\/v2\/product_brand?post=1755"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.zishengelectric.com\/es\/wp-json\/wp\/v2\/product_cat?post=1755"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.zishengelectric.com\/es\/wp-json\/wp\/v2\/product_tag?post=1755"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}