{"id":795,"date":"2025-03-29T00:58:24","date_gmt":"2025-03-29T00:58:24","guid":{"rendered":"https:\/\/pineele.com\/?p=795"},"modified":"2025-03-29T01:00:47","modified_gmt":"2025-03-29T01:00:47","slug":"132-33kv-50-mva-power-transformer-specification-application-guide","status":"publish","type":"post","link":"https:\/\/pineele.com\/132-33kv-50-mva-power-transformer-specification-application-guide","title":{"rendered":"132\/33kV 50 MVA Power Transformer Specification & Application Guide"},"content":{"rendered":"\n

What Is a 132\/33kV 50 MVA Transformer?\n\n\n\n

A132\/33kV 50 MVA transformer is ahigh-voltage power transformer used to step down voltage from 132kV (transmission) to 33kV (distribution level). With acapacity of 50 MVA (megavolt-amperes), this transformer is ideal forregional substations,industrial plants, andrenewable integration hubs.\n\n\n\n

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Technical Specification Table\n\n\n\n

Parameter	Specification
Rated Power	50 MVA
Primary Voltage (HV)	132 kV
Secondary Voltage (LV)	33 kV
Vector Group	Dyn11 \/ YNd1 \/ YNd11 (as per design)
Frequency	50 Hz \/ 60 Hz
Phase	3-Phase
Cooling Type	ONAN \/ ONAF (Oil Natural \/ Forced)
Tap Changer	OLTC (\u00b110%, \u00b116 steps) or NLTC optional
Impedance	Typically 10.5% \u2013 12%
Dielectric Strength	HV: 275kV \/ LV: 70kV impulse
Bushing Type	Porcelain or Composite
Insulation Class	Class A \/ F
Protection	Buchholz relay, PRV, OTI, WTI, DGPT2\n\n\n\n \n\n\n\n Applications of 132\/33kV 50 MVA Transformer\n\n\n\n \n Grid Substations\n\n\n\n Large Industrial Plants\n\n\n\n Wind & Solar Farms\n\n\n\n Urban Transmission Hubs\n\n\n\n Oil & Gas Installations\n\n\n\n Interconnection with Power Utilities\n\n\n\n\n \n\n\n\n Cooling Methods Explained\n\n\n\n \n ONAN \u2013 Oil Natural Air Natural (standard for up to 50 MVA)\n\n\n\n ONAF \u2013 Oil Natural Air Forced for improved performance under peak loads\n\n\n\n\n \n\n\n\n Construction & Design\n\n\n\n \n Core: Cold-rolled grain-oriented silicon steel\n\n\n\n Winding: Copper (high-conductivity), layered or disc winding\n\n\n\n Tank: Hermetically sealed or conservator type\n\n\n\n Cooling Radiators: Detachable for modular maintenance\n\n\n\n Accessories: Oil level gauge, breather, pressure relief device, temperature indicators, etc.\n\n\n\n\n \n\n\n\n Standard Compliance\n\n\n\n \n IEC 60076\n\n\n\n ANSI\/IEEE C57\n\n\n\n IS 2026 (India)\n\n\n\n GB\/T 6451 (China)\n\n\n\n BS EN Standards (UK)\n\n\n\n\n \n\n\n\n Why Choose a 50 MVA Transformer at 132\/33kV?\n\n\n\n \n Balances high capacity with manageable size\n\n\n\n Ideal for step-down to regional grids\n\n\n\n Ensures high-efficiency transmission with minimal losses\n\n\n\n Compatible with smart grid SCADA integration\n\n\n\n\n \n\n\n\n \n\n\n\n \n\n\n\n \n\n\n\n Frequently Asked Questions (FAQs)\n\n\n\n Q1: Can this transformer support dual voltage outputs? Yes. With dual secondary windings or tap changer settings, the transformer can support flexible output.\n\n\n\n Q2: Is OLTC mandatory? For systems requiring voltage regulation, OLTC is preferred. However, for fixed-load conditions, NLTC can be used.\n\n\n\n Q3: How long does a 132\/33kV transformer last? With proper maintenance, the expected service life is 25\u201335 years or more.\n","protected":false},"excerpt":{"rendered":" What Is a 132\/33kV 50 MVA Transformer? A 132\/33kV 50 MVA transformer is a high-voltage power transformer used to step down voltage from 132kV (transmission) to 33kV (distribution level). With a capacity of 50 MVA (megavolt-amperes), this transformer is ideal for regional substations, industrial plants, and renewable integration hubs. Technical Specification Table Parameter Specification Rated […]\n","protected":false},"author":1,"featured_media":796,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[26],"tags":[],"class_list":["post-795","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"acf":[],"yoast_head":"\n