Name: Auxiliary Transformers
Brand: Emirates Transformer & Switchgear
SKU: auxiliary-transformers

Question 1

What capacity range do ETS auxiliary transformers offer?

Accepted Answer

Our auxiliary and station service transformers range from 50 kVA to 2 MVA with voltages up to 36 kV — serving as house-load transformers for US substations, power plants, and industrial facilities.

Question 2

Are ETS auxiliary transformers compliant with IEEE standards?

Accepted Answer

Yes. All units are designed and tested to IEEE C57.12 standards. For generator auxiliary (UAT) applications, we also reference IEEE C57.12.10 and relevant ANSI requirements.

Question 3

What are the primary US applications for auxiliary transformers?

Accepted Answer

Station service transformers supply power for substation control systems, cooling equipment, lighting, and emergency circuits. In power plants, they serve as unit auxiliary transformers (UATs) for turbine house loads.

Question 4

Does ETS offer custom winding configurations?

Accepted Answer

Yes. We supply single, dual, and triple secondary winding options. Custom impedance values, specific BIL levels, and 60 Hz designs are standard for US applications.

Question 5

What factory testing is included?

Accepted Answer

Full routine testing per IEEE C57.12.90 — ratio, polarity, impedance, losses, applied voltage, induced voltage, and insulation resistance. Type test reports are available upon request.

Question 6

What are lead times and logistics for US delivery?

Accepted Answer

Manufacturing requires 8–12 weeks. Auxiliary transformers are compact enough for standard container shipping, reducing ocean freight costs. US delivery adds 4–6 weeks.

Question 7

What makes ETS a good choice for auxiliary transformers in the US?

Accepted Answer

ETS offers competitive pricing on auxiliary units that benefit from the same quality systems applied to our larger power transformers. Our US office provides local commercial support, while Dubai manufacturing ensures cost efficiency.

Question 8

How long is the lead time for a ANSI / IEEE C57-approved auxiliary transformers order in the United States?

Accepted Answer

Standard lead time is 10–16 weeks for distribution units and 28–40 weeks for IEEE C57 power-class transformers, including ocean freight and US customs clearance. Project-specific timelines are confirmed within 48 hours of receiving your technical specification — [CTA:Request a binding quote] and our engineering team will share an indicative manufacturing slot the same week.

Question 9

How do I request a quote for 15 kV / 25 kV auxiliary transformers in USA?

Accepted Answer

The fastest path is to share kVA rating, primary/secondary voltages, vector group, impedance, cooling type and site delivery address. [CTA:Request a quote] using our two-tier RFQ form (Basic for indicative pricing, Advanced for full technical specification) — our USA commercial team replies within one working day.

Question 10

Can ETS deliver an emergency replacement auxiliary transformers in USA?

Accepted Answer

Yes. ETS coordinates emergency replacements through our Gaithersburg, MD office and pre-qualified US heavy-haul partners. For ANSI pad-mounted and substation transformers we can typically dispatch within 2–3 weeks via expedited air or sea freight, depending on rating. [CTA:Request emergency support] and tag your enquiry "URGENT — emergency replacement" so we route it directly to the on-call engineering manager.

Parameter	Range / Value
Rated Power	50 kVA – 2 MVA
Primary Voltage	6.6 – 36 kV
Secondary Voltage	230/400 V – 690 V
Frequency	50 / 60 Hz
Impedance	4% – 6%
Vector Group	Dyn11, Yyn0
Temperature Rise	Top oil ≤ 55K, Winding ≤ 60K
Noise Level	≤ 50 dB(A)
Ambient Temp	-25°C to +50°C
Design Life	25+ years

Auxiliary Transformers

Engineering Features

Station Service Supply

Station Service Supply

Technical Data

Related glossary terms

Where Auxiliary Transformers Excel.

Power Substations

Power Plants

Industrial Facilities

Renewable Energy

Frequently Asked Questions

Related Knowledge

Medium Power Transformers

Distribution Liquid Transformers

Containerized Substation

Ready to Specify Auxiliary Transformers?