--- title: "Power Transformers | Entogo" description: "Entogo — Power Transformers. Separate distribution-level equipment from high-voltage and inverter-duty applications." url: https://entogo.ca/products/families/power-transformers/ lang: en type: website image: https://entogo.ca/og-cover.jpg alternates: en: https://entogo.ca/products/families/power-transformers/ fr-CA: https://entogo.ca/fr/products/families/power-transformers/ fr: https://entogo.ca/fr/products/families/power-transformers/ es: https://entogo.ca/es/products/families/power-transformers/ ar: https://entogo.ca/ar/products/families/power-transformers/ pl: https://entogo.ca/pl/products/families/power-transformers/ ro: https://entogo.ca/ro/products/families/power-transformers/ ru-KZ: https://entogo.ca/ru/products/families/power-transformers/ ru-UZ: https://entogo.ca/ru/products/families/power-transformers/ ru-KG: https://entogo.ca/ru/products/families/power-transformers/ ru-TJ: https://entogo.ca/ru/products/families/power-transformers/ ru-TM: https://entogo.ca/ru/products/families/power-transformers/ ru-AZ: https://entogo.ca/ru/products/families/power-transformers/ ru-AM: https://entogo.ca/ru/products/families/power-transformers/ ru-GE: https://entogo.ca/ru/products/families/power-transformers/ site: https://entogo.ca/ llms: https://entogo.ca/llms.txt --- Products › Power Transformers Entogo # Power Transformers Separate distribution-level equipment from high-voltage and inverter-duty applications. Select the transformer against the network study: voltage ratio, MVA, impedance, insulation level, tap regulation and cooling. High-voltage substation duty and inverter duty add distinct requirements. A voltage class alone does not define the transformer or the scope of supply. [![Entogo 36 kV class three-phase oil-immersed power transformer for substations](https://entogo.ca/_astro/Entogo-35kV-Three-Phase-Oil-Immersed-Distribution-Transformer.BWoRk9EQ_Z1dAjmQ.webp) Power Transformers ### 36 kV Oil-Immersed Power Transformer A liquid-filled (mineral oil) three-phase power transformer for substation and subtransmission duty in 34.5 / 35 / 36 kV networks, rated 2.5 to 31.5 MVA with ONAN / ONAF cooling, off-circuit or on-load tap changing and copper windings, designed to IEEE C57.12.00 / C57.12.10 and IEC 60076. View](https://entogo.ca/products/oil-immersed-power-transformer-36kv/)[![High-Voltage Power Transformer](https://entogo.ca/_astro/high-voltage-power-transformer.BAMCXTL9_ZNvUsc.webp) Power Transformers ### High-Voltage Power Transformer Entogo supplies high-voltage power transformers for substations and industrial networks. The design brief covers MVA, voltage ratio, insulation coordination, impedance, tap regulation, cooling and transport limits. View](https://entogo.ca/products/high-voltage-power-transformer/)[![Solar Inverter-Duty Transformer](https://entogo.ca/_astro/solar-inverter-duty-transformer.CmSgUtIf_1aiy1j.webp) Power Transformers ### Solar Inverter-Duty Transformer Entogo supplies inverter-duty transformers for PV and battery-storage interconnection. Match the inverter/PCS voltage, winding arrangement, grounding, harmonics and thermal duty to the collector network and connection study. View](https://entogo.ca/products/solar-inverter-duty-transformer/) ## Design references [![Medium-voltage transformer and switchgear at an industrial substation where the system grounding scheme is set](https://entogo.ca/_astro/power-system-grounding-scheme-selection.BsvN5i1W_Z2pcsel.webp) Power & Distribution ### Solidly grounded, resistance-grounded, or ungrounded? Choosing a power system grounding scheme Most North American facilities are solidly grounded, but resistance grounding can keep a plant running through a first ground fault. How to choose among solidly grounded, high-resistance grounded, and ungrounded systems, and what each requires under the NEC and IEEE 142. View](https://entogo.ca/insights/power-system-grounding-scheme-selection/)[![Power transformer at an electrical substation, where nameplate percent impedance sets fault current and voltage regulation](https://entogo.ca/_astro/transformer-impedance-percent-z-selection.CNeq_Jkf_24aj2F.webp) Power & Distribution ### What transformer impedance should you specify? How %Z shapes fault current and voltage drop Transformer percent impedance (%Z) sets how much fault current the secondary can deliver and how far voltage sags under load. Lower %Z means higher available fault current and better regulation; higher %Z limits fault duty but drops more voltage. Here is how to choose it and what to specify. View](https://entogo.ca/insights/transformer-impedance-percent-z-selection/)[![Distribution substation and grid interconnection point for solar and battery energy storage](https://entogo.ca/_astro/ieee-1547-der-grid-interconnection.BmCW5JmP_14fafr.webp) Renewable Grid Connection ### Interconnecting solar and storage to the grid: what IEEE 1547-2018 requires Connecting solar or battery storage to the North American grid means meeting IEEE 1547-2018 for DER behavior, using a UL 1741 SB certified inverter, and passing a utility interconnection review that scales from a fast-track screen to a full study. Here is how the pieces fit. View](https://entogo.ca/insights/ieee-1547-der-grid-interconnection/) For Canadian and US projects, include the utility specification, service frequency and required approvals. State whether the order is for the transformer alone or an integrated equipment package. ## Discuss your equipment requirements [Request a project quote](https://entogo.ca/contact/) ## Browse equipment families Compare equipment by function and installation. Product pages identify the available scope and the information needed for a quotation. ## Structured data (JSON-LD) ```json {"@context":"https://schema.org","@type":"CollectionPage","@id":"https://entogo.ca/products/families/power-transformers/#collection","url":"https://entogo.ca/products/families/power-transformers/","name":"Power Transformers","description":"Entogo — Power Transformers. 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