Is Entogo a transformer manufacturer or a trading company?

Entogo is a Canadian company with its own factory in China — a vertically integrated plant of about 20,000 m², not a third-party supplier whose products it resells. Entogo Inc. signs the contract, provides engineering support and issues the warranty.

Can you build transformers to our drawings and specification?

Yes. Entogo builds to customer drawings, specifications and utility standards (build-to-print) or customizes its own catalogue designs — rating, voltages, taps, impedance, losses, windings, tank and accessories. Approval drawings are issued for your sign-off before production.

Can you supply private-label transformers under our brand?

Yes. The nameplate, labels, test reports and manuals can carry your brand. Minimum order quantity, branding and packaging are not published as fixed terms; they are confirmed per project in the quotation, and the engagement can be covered by a non-disclosure agreement.

What is the lead time for an OEM or custom transformer?

OEM and customized units follow the same lead times as catalogue products: 16–24 weeks for North-American-spec (ANSI/IEEE) builds, within 36 weeks when the order needs new cULus/CSA certification, and about 12 weeks for IEC/CE equipment built for export markets.

Do OEM transformers carry UL or CSA certification?

Transformers are designed to IEEE C57, CSA C88 / C9 and DOE 10 CFR 431, and can be certified to your market’s requirements on request — UL (cULus), CSA, CE or IEC CB. Orders that need new cULus/CSA certification ship within 36 weeks; timing and scope for your model and rating are confirmed in the quotation.

Where are the transformers made, and how does that affect Buy America projects?

In Entogo’s own factory in China. Entogo states the country of origin up front so you can plan duties, tariffs and project origin requirements — for example Buy America or BABA-funded work — before you order.

Transformer OEM

OEM transformer manufacturer for distribution and power transformers

Pad-mounted, pole-mounted, dry-type and power transformers and packaged unit substations — built to your drawings, customized from our designs or supplied under your brand, with North-American-spec builds in 16–24 weeks.

What we build

Transformer and substation types available OEM

Built on the catalogue designs below or entirely to your drawings — ratings shown are catalogue ranges; other ratings are quoted per project.

Pad-mounted transformers

Three-phase, liquid-filled, 75–2500 kVA, 15/25/35 kV class, dead-front loop- or radial-feed; combined units integrate MV load-break switching and fusing in the same tank.

Pole-mounted transformers

Single-phase overhead units, 10–167 kVA, conventional or completely self-protected (CSP), plus complete pole-mount packages with cutout, arrester and hardware.

Dry-type transformers

Ventilated three-phase units, 15–2500 kVA, 600 V class and medium voltage to 35 kV class, 220 °C insulation; cast-resin / VPI and amorphous-core versions available.

Power transformers

Oil-immersed three-phase units, 2.5–31.5 MVA, for 34.5 / 35 / 36 kV substation and subtransmission duty, ONAN / ONAF, off-circuit or on-load tap changing.

Packaged unit substations

Compact secondary unit substations (15/25 kV class, up to 2500 kVA), 36 kV outdoor unit substations (1,000–10,000 kVA) and modular skid-mounted step-up / collector substations.

Inverter-duty and low-loss designs

Solar / storage step-up skids to 34.5 kV for PV and BESS interconnection, and three-dimensional wound-core and amorphous-core transformers for loss-evaluated bids.

What can be customized

Engineered to your specification, labeled as your product

Typical customization areas for OEM and private-label transformers — the exact scope is confirmed in the quotation.

Electrical design

kVA / MVA rating, primary and secondary voltages, BIL, taps, impedance, loss targets, cooling class and copper or aluminum windings to your specification or utility standard.

Tank, enclosure and accessories

Loop- or radial-feed, dead- or live-front, bushings, gauges, insulating fluid (mineral oil or FR3 natural ester), enclosure, paint color and footprint to your drawings.

Components of your choice

Specified bushings, switches, fuses, tap changers and monitoring devices from your preferred brands where the design allows — confirmed in the quotation.

Private label

Your brand on the nameplate, decals, test reports and manuals. Minimum order quantity, branding and packaging are confirmed per project in the quotation.

Documentation and labeling

Approval drawings, nameplates, test reports and O&M manuals in your format, document numbering and language — scope confirmed in the quotation.

Build-to-print

Manufactured to your drawings, specifications and bill of materials, with approval drawings issued for your sign-off before production starts.

Standards & certification

ANSI/IEEE for North America, IEC for export

Designed to IEEE C57, CSA and DOE efficiency standards for the U.S. and Canada, or to IEC 60076 for export — and certified to your market’s requirements on request: UL (cULus), CSA, CE or IEC CB.

IEEE C57 design basis

IEEE C57.12.00, C57.12.34 (pad-mounted), C57.12.20 (overhead) and C57.12.10 (power), C57.12.28 enclosure integrity and C57.12.90 test code; CSA C88 and CSA C9 in Canada.

DOE efficiency

Distribution transformers designed to U.S. DOE 10 CFR 431 minimum efficiency, with amorphous-metal cores for utilities that evaluate no-load losses.

UL / CSA certification

UL (cULus) and CSA certification available on request for your model and rating (UL 1561 / 1562 for dry-type); orders needing new certification ship within 36 weeks.

IEC and export

IEC 60076 transformers and IEC 62271-202 substations for export markets, built in about 12 weeks; CE marking and IEC CB certification on request, with timing and scope confirmed in the quotation.

Management systems

Built under ISO 9001, ISO 14001, ISO 45001 and IATF 16949 management systems, with CE and IEC CB Scheme marks held across product lines.

Quality & delivery

Tested in our own factory, delivered on a dependable schedule

Lead time

North-American-spec builds in 16–24 weeks; within 36 weeks when new cULus/CSA certification is needed; IEC/CE units in about 12 weeks — the same as catalogue products.

Routine tests and FAT

Routine tests to the applicable IEEE or IEC test code before shipment, with factory acceptance test documentation, quality inspection reports and serial-number records.

Witnessed inspection

Third-party inspection or a witnessed factory acceptance test can be arranged for eligible projects.

Warranty

Warranty term set per product, minimum 36 months — a manufacturer warranty issued by Entogo Inc., with term and coverage confirmed per contract.

Confidentiality and origin

Your drawings and specifications are covered by a non-disclosure agreement. China is stated as the country of origin up front, so duties and origin requirements can be planned.

An inverter-duty step-up unit substation (solar/storage skid) integrating a liquid-filled step-up transformer, MV switching and inverter interface — stepping inverter output up to 34.5 kV for PV and battery-storage interconnection, 60 Hz. Designed to IEEE C57.12.34, C57.159 and C37.121; UL/CSA certifiable.

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OEM

Transformer OEM questions

Is Entogo a transformer manufacturer or a trading company?: Entogo is a Canadian company with its own factory in China — a vertically integrated plant of about 20,000 m², not a third-party supplier whose products it resells. Entogo Inc. signs the contract, provides engineering support and issues the warranty.
Can you build transformers to our drawings and specification?: Yes. Entogo builds to customer drawings, specifications and utility standards (build-to-print) or customizes its own catalogue designs — rating, voltages, taps, impedance, losses, windings, tank and accessories. Approval drawings are issued for your sign-off before production.
Can you supply private-label transformers under our brand?: Yes. The nameplate, labels, test reports and manuals can carry your brand. Minimum order quantity, branding and packaging are not published as fixed terms; they are confirmed per project in the quotation, and the engagement can be covered by a non-disclosure agreement.
What is the lead time for an OEM or custom transformer?: OEM and customized units follow the same lead times as catalogue products: 16–24 weeks for North-American-spec (ANSI/IEEE) builds, within 36 weeks when the order needs new cULus/CSA certification, and about 12 weeks for IEC/CE equipment built for export markets.
Do OEM transformers carry UL or CSA certification?: Transformers are designed to IEEE C57, CSA C88 / C9 and DOE 10 CFR 431, and can be certified to your market’s requirements on request — UL (cULus), CSA, CE or IEC CB. Orders that need new cULus/CSA certification ship within 36 weeks; timing and scope for your model and rating are confirmed in the quotation.
Where are the transformers made, and how does that affect Buy America projects?: In Entogo’s own factory in China. Entogo states the country of origin up front so you can plan duties, tariffs and project origin requirements — for example Buy America or BABA-funded work — before you order.

OEM by product line

Every product line, available OEM, customized or private-label

OEM

Send your transformer specification.

Request an OEM quote

Drawings, a datasheet or a short description of your requirement — our engineering team replies within one business day, under NDA if you need one.