--- title: "Dry-Type Transformers | Entogo" description: "Entogo — Dry-Type Transformers. Compare construction and electrical function before selecting a dry-type unit." url: https://entogo.ca/products/families/dry-type-transformers/ lang: en type: website image: https://entogo.ca/og-cover.jpg alternates: en: https://entogo.ca/products/families/dry-type-transformers/ fr-CA: https://entogo.ca/fr/products/families/dry-type-transformers/ fr: https://entogo.ca/fr/products/families/dry-type-transformers/ es: https://entogo.ca/es/products/families/dry-type-transformers/ ar: https://entogo.ca/ar/products/families/dry-type-transformers/ pl: https://entogo.ca/pl/products/families/dry-type-transformers/ ro: https://entogo.ca/ro/products/families/dry-type-transformers/ ru-KZ: https://entogo.ca/ru/products/families/dry-type-transformers/ ru-UZ: https://entogo.ca/ru/products/families/dry-type-transformers/ ru-KG: https://entogo.ca/ru/products/families/dry-type-transformers/ ru-TJ: https://entogo.ca/ru/products/families/dry-type-transformers/ ru-TM: https://entogo.ca/ru/products/families/dry-type-transformers/ ru-AZ: https://entogo.ca/ru/products/families/dry-type-transformers/ ru-AM: https://entogo.ca/ru/products/families/dry-type-transformers/ ru-GE: https://entogo.ca/ru/products/families/dry-type-transformers/ site: https://entogo.ca/ llms: https://entogo.ca/llms.txt --- Products › Dry-Type Transformers Entogo # Dry-Type Transformers Compare construction and electrical function before selecting a dry-type unit. Dry-type describes construction; isolation describes the separation between circuits. Cast-resin, non-encapsulated and wound-core options therefore need not be competing products. Compare winding design, losses, ventilation, enclosure, fire requirements and the actual load before choosing a unit. Available construction options include cast-resin and non-encapsulated dry-type designs. Construction, electrical isolation and load duty are different selection criteria. State the required winding insulation, load profile and installation environment in your inquiry. [![Entogo three-phase ventilated dry-type distribution transformer for indoor installation](https://entogo.ca/_astro/Entogo-Three-Phase-Dry-Type-Distribution-Transformer.CFPX-dwa_ZTA5IE.webp) Dry-Type Transformers ### Three-Phase Dry-Type Distribution Transformer A three-phase ventilated dry-type distribution transformer for indoor commercial/industrial service — 15–2500 kVA, low-voltage 600 V class (480 to 208Y/120) and medium-voltage to 35 kV class, 220 °C insulation. Designed to UL 1561/1562, CSA C9 and DOE 10 CFR 431; UL/CSA certifiable. View](https://entogo.ca/products/three-phase-dry-type-distribution-transformer/)[![Entogo amorphous-core high-efficiency dry-type transformer](https://entogo.ca/_astro/Entogo-SCBH15-Amorphous-Alloy-Dry-Type-Transformer.CfCVUmci_Z56Pvf.webp) Dry-Type Transformers ### Amorphous-Core Dry-Type Transformer (High-Efficiency) A high-efficiency amorphous-metal-core dry-type transformer with very low no-load loss, low noise and low partial discharge — 30–2500 kVA, medium-voltage primary to 35 kV class stepping down to 480/208 V, fire-safe. Designed to UL 1562, CSA C9/C802.2 and DOE 10 CFR 431; UL/CSA certifiable. View](https://entogo.ca/products/amorphous-core-dry-type-transformer/)[![Entogo three-dimensional triangular wound-core low-loss distribution transformer](https://entogo.ca/_astro/Entogo-Stereoscopic-Triangular-Transformer.ChH9EFSn_Z1ffw8C.webp) Dry-Type Transformers ### Three-Dimensional Wound-Core Transformer (Low-Loss) A three-dimensional (triangular) wound-core distribution transformer with a closed, symmetric core for lower no-load loss, balanced flux, low noise and high short-circuit withstand — oil-filled or dry-type, 15/25/35 kV class, 60 Hz. Designed to IEEE C57/UL and DOE 10 CFR 431; UL/CSA certifiable. View](https://entogo.ca/products/wound-core-distribution-transformer/)[![Electrical Isolation Transformer](https://entogo.ca/_astro/isolation-transformer.DSeX7yhX_Z1TxHzw.webp) Dry-Type Transformers ### Electrical Isolation Transformer Entogo supplies electrical isolation transformers with separate primary and secondary windings. Select voltage ratio, kVA, shielding, grounding and enclosure for the load; isolation duty and dry-type construction are distinct requirements. View](https://entogo.ca/products/isolation-transformer/) ## Design references [![Dry-type and liquid-filled distribution transformers in an electrical power room](https://entogo.ca/_astro/dry-type-vs-liquid-filled-transformers.BKAvodlK_Zc9wnk.webp) Power & Distribution ### Dry-type vs. liquid-filled transformers - how to choose Dry-type transformers cool with air and solid insulation while liquid-filled units use mineral or less-flammable oil. The right pick turns on installation location, fire and code rules, voltage class, efficiency, and maintenance - not on which type is generally better. View](https://entogo.ca/insights/dry-type-vs-liquid-filled-transformers/)[![Distribution transformer on a utility pole, the class of equipment evaluated on total owning cost using DOE 10 CFR 431 loss data](https://entogo.ca/_astro/total-owning-cost-transformer-loss-evaluation.C6bYtPQN_z9pu1.webp) Power & Distribution ### Total owning cost of a transformer: how to evaluate losses in a bid Total owning cost adds the capitalized value of no-load and load losses to the purchase price. At 14.53 cents per kWh over 10 years the A factor is 8.54 dollars per watt and the B factor 1.73 at rated load, the break-even A factor is 6.30, and a bid 3,400 dollars dearer wins by 1,208 dollars. View](https://entogo.ca/insights/total-owning-cost-transformer-loss-evaluation/)[![Distribution transformer and secondary conductors feeding low-voltage distribution equipment, governed by NEC 240.21(C) tap rules and CEC Rule 26-256](https://entogo.ca/_astro/transformer-secondary-conductors-nec-240-21c-tap-rules.BX_tOclr_UXL9N.webp) Power & Distribution ### How long can transformer secondary conductors be? NEC 240.21(C) tap rules and CEC 26-256 Transformer secondary conductors get no next-size-up rule. NEC 240.21(C) allows 10 ft and 25 ft runs with ampacity floors of one-tenth and one-third of the primary device times the voltage ratio; CEC 26-256 instead demands 125% of rated secondary current at any length. View](https://entogo.ca/insights/transformer-secondary-conductors-nec-240-21c-tap-rules/) 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/dry-type-transformers/#collection","url":"https://entogo.ca/products/families/dry-type-transformers/","name":"Dry-Type Transformers","description":"Entogo — Dry-Type Transformers. Compare construction and electrical function before selecting a dry-type unit.","mainEntity":{"@type":"ItemList","itemListElement":[{"@type":"ListItem","position":1,"name":"Three-Phase Dry-Type Distribution Transformer","url":"https://entogo.ca/products/three-phase-dry-type-distribution-transformer/"},{"@type":"ListItem","position":2,"name":"Amorphous-Core Dry-Type Transformer (High-Efficiency)","url":"https://entogo.ca/products/amorphous-core-dry-type-transformer/"},{"@type":"ListItem","position":3,"name":"Three-Dimensional Wound-Core Transformer (Low-Loss)","url":"https://entogo.ca/products/wound-core-distribution-transformer/"},{"@type":"ListItem","position":4,"name":"Electrical Isolation Transformer","url":"https://entogo.ca/products/isolation-transformer/"}]},"inLanguage":"en"} ``` ```json {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Products","item":"https://entogo.ca/products/"},{"@type":"ListItem","position":2,"name":"Dry-Type Transformers"}],"inLanguage":"en"} ``` _Markdown twin of https://entogo.ca/products/families/dry-type-transformers/ — generated at build time from the same content as the HTML page. Company facts, catalogue index and contact: https://entogo.ca/llms.txt_