200 kVA Oil-Immersed 3 Phase Step Down Transformer, 11kV to 400V, IEC/ANSI Compliant

200 kVA 11kV to 400V Oil-Immersed 3 Phase Step Down Transformer For Sale

The 200 kVA 3 Phase Step Down Transformer is a durable and energy-efficient solution for medium-voltage to low-voltage conversion in commercial, industrial, and municipal distribution networks. Engineered for 11 kV primary and 400 V secondary voltages, this oil-immersed transformer is ideally suited for use across European and international 50 Hz power grids. Its grounded Wye secondary ensures balanced loads and safe neutral availability, making it an optimal choice for applications requiring reliable three-phase distribution.

Manufactured by Energy Transformer, a certified power transformer supplier with over 30 years of experience, this unit features a precision-engineered magnetic core built with cold-rolled grain-oriented silicon steel (CRGO) and oxygen-free copper windings for superior conductivity and low core losses. The transformer tank is filled with high-grade mineral insulating oil that provides long-term thermal and dielectric stability, with optional biodegradable or fire-resistant fluids available.

Designed to meet or exceed international standards such as IEC 60076, ANSI C57, and IEEE, the transformer is enclosed in a hermetically sealed steel tank coated with anti-corrosion paint for maximum protection against moisture, salt spray, and mechanical wear. Built-in protection features include a temperature indicator, oil level sight glass, pressure relief valve, and optional gas relay for enhanced safety.

This 200 kVA oil-filled 3 phase step-down transformer is widely used in utility substations, industrial parks, logistics hubs, shopping centers, and public infrastructure projects. It is also well-suited for integration with renewable energy systems, battery storage applications, and backup generators.

Energy Transformer supports OEM, ODM, and customized transformer designs, offering competitive pricing for bulk orders and export-ready documentation. With successful deployments in the United States, Canada, Germany, France, the Netherlands, the UK, Spain, Portugal, Australia, and beyond, we serve EPCs, distributors, and electrical contractors with fast lead times, stable inventory, and global logistics support.

If you are sourcing a dependable 11kV to 400V 3 phase distribution transformer for commercial or light industrial power networks, Energy Transformer provides certified, factory-direct solutions to match your grid and application needs.

Learn More:400 kVA Step Down Oil-Immersed Distribution Transformer, 13.8 kV to 480Y/277 V, ANSI Standard

200 kVA 11kV to 400V Oil-Immersed 3 Phase Step Down Transformer Technical Specs

No.	Item	Specification	Description
1	Rated Capacity	200 kVA	Suitable for small to mid-scale commercial and industrial low-voltage distribution
2	Input Voltage	11 kV (Delta)	Standard medium-voltage input, adaptable to 10.5 kV or 13.8 kV upon request
3	Output Voltage	400 V / 230 V (Wye)	Ideal for European, Australian, and international 50 Hz power networks
4	Phase Configuration	3-phase, 50/60 Hz	Compatible with both EU and North American system frequencies
5	Cooling System	ONAN (Oil Natural Air Natural)	Quiet, self-regulating cooling system requiring no external fans
6	Core Material	CRGO silicon steel	Minimizes core losses for better power quality and energy savings
7	Insulation Medium	Mineral oil (IEC/ASTM Grade)	Delivers thermal stability and insulation under continuous operation
8	Temperature Rise	Max 60°C	Optional energy-saving model available with 50°C or 55°C rise limits
9	Enclosure Design	Sealed, rust-resistant tank	Outdoor-rated with optional pad-mounting; IP44/IP54 protection classes available
10	Standards Compliance	IEC 60076, ANSI C57, BS, EN	Designed to meet grid standards across Europe, UK, Canada, and Australia
11	Certifications	CE, UL, ISO 9001, RoHS, SGS	Export-ready and approved for international utility and private use
12	Winding Configuration	Delta primary – Wye grounded secondary	Custom options available: Wye-Wye, Delta-Delta, Wye-Delta
13	Target Applications	Commercial buildings, EV charging, infrastructure	Also fits rural networks, solar farms, and construction projects
14	Protection Features	Oil gauge, thermal sensor, relief valve	Optional surge arresters, oil drain valves, and gas relays available
15	Transformer Size	Varies by enclosure and voltage group	Weight: ~600–900 kg depending on cooling and material
16	Efficiency Rating	Meets DOE & Ecodesign standards	Designed for minimal core and copper losses under full load
17	Mounting Method	Skid base with lifting lugs	Ready for crane/forklift transport and permanent outdoor installation
18	Operating Range	-25°C to +45°C	Arctic version available for extreme cold to -40°C
19	Full Load Loss	Approx. 1.0–1.3%	Balanced for high performance and energy savings at rated output
20	No-Load Loss	≤ 0.25%	Maintains minimal energy use during idle periods
21	Load Loss	≤ 0.85%	Low-resistance copper windings ensure stable delivery
22	Impedance	4.5% ±10%	Tunable upon request for grid harmonics and fault coordination
23	Short Circuit Capacity	Up to 16 kA for 2s	Internally braced for mechanical durability during fault events
24	Insulation Class	Class A (105°C) standard	Class B or Class F upgrade for high-temp areas
25	Winding Material	Copper standard, aluminum optional	Copper preferred for longer life and greater thermal endurance
26	Tap Changer	±2 × 2.5% Off-Circuit Tap Changer	On-load tap changer (OLTC) upgrade available for voltage tuning
27	Bushings	Porcelain or polymer per ANSI/IEC	Salt-resistant polymer bushings for coastal or desert regions
28	Oil Volume	Approx. 90–110 Liters	Depends on tank style and ambient temperature specification
29	Lifespan Expectancy	20–30 years	Designed for long-term reliability with minimal maintenance
30	Audible Noise	≤ 50 dB @ 1m	Quiet operation ideal for residential or mixed-use areas
31	Warranty Coverage	2-year base warranty	Extended warranties and service contracts offered on request
32	Lead Time (Stock)	15–25 days	In-stock models ship quickly for urgent project needs
33	Lead Time (Custom)	40–55 days	Efficient custom manufacturing with full compliance documentation
34	Pricing Terms	RFQ based on specs and quantity	Tiered pricing available for bulk, OEM, or export orders
35	Origin & Brand	Energy Transformer (China)	Proven OEM transformer factory with global supply to the EU, US, and Australia

✅ 200 kVA 3 Phase Step Down Transformer Overview

ENERGY TRANSFORMER's 200 kVA 3 Phase Step Down Transformer is engineered for stable voltage reduction from 11 kV to 400 V in European and North American grids. This oil-immersed unit is designed for outdoor operation, offering high thermal efficiency, low loss, and long service life. Compliant with IEC, ANSI, and IEEE standards, it delivers safe and reliable medium-voltage distribution for commercial and utility use.

✅ Applications of 200 kVA Step Down Transformer

Ideal for commercial complexes, EV charging stations, agricultural irrigation, manufacturing plants, public infrastructure, and renewable energy systems. The 3 Phase Step Down Transformer ensures dependable performance in diverse applications across the UK, Germany, Spain, France, the U.S., and Canada.

✅ Reliable 3 Phase Transformer Manufacturer

ENERGY TRANSFORMER is a global transformer manufacturer with ISO 9001 certification, specializing in 3 Phase Step Down Transformers for over 30 years. All units are tested and certified to UL, CSA, CE, and DOE standards. We support OEM/ODM solutions and offer competitive factory-direct pricing with custom branding options.

✅ 3 Phase Step Down Transformer Availability in US & EU

We supply ready-to-ship units and made-to-order models through our logistics hubs in Rotterdam, Antwerp, Houston, Los Angeles, Toronto, and Barcelona. Products are tailored to local grid codes and supported with complete documentation.

✅ 200 kVA Step Down Transformer for Sale

Available in stock or with short production lead times. Delivered FOB, CIF, or DDP to your port or job site. Perfect for EPCs, distributors, and infrastructure contractors needing certified 3 Phase Step Down Transformers.

✅ 200 kVA Transformer Electrical Configuration

Primary: 11 kV Delta
Secondary: 400Y/230 V Wye
The 3 Phase Step Down Transformer supports balanced load distribution and grounded neutral for enhanced safety. Optional configurations include Delta-Delta or Wye-Wye.

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✅ Amperage Calculation (3 Phase Step Down)

Low Voltage (400 V): ≈ 289 A
High Voltage (11 kV): ≈ 10.5 A
Amps = (200 × 1000) ÷ (√3 × Voltage)

✅ Transformer Dimensions & Mounting

Approx. Size: 1500 mm × 1100 mm × 1400 mm
Mounting: Pad-mounted steel skid base
Custom enclosures available for space-limited or urban installations

✅ Weight & Oil Volume

Weight: 850 – 1,100 kg
Oil Capacity: 120–160 liters of mineral-based insulating fluid
All oils meet IEC 60296 and ASTM D3487 standards; optional biodegradable and fire-resistant fluids available

✅ Price of 200 kVA 3 Phase Step Down Transformer

Price Range: $3,500 – $6,800 USD depending on design, certifications, and options
Request a custom quote for your project (FOB/CIF/DDP options available)

✅ Energy Efficiency Standards

Meets EU EcoDesign Tier 2 and U.S. DOE 2016 energy efficiency guidelines
Low core and copper losses thanks to CRGO laminated steel and copper windings

Get More:Electrical Power Transformers: Definition, Types, and Applications

✅ Tap Changer Options

Manual OCTC ±2 × 2.5% standard
Optional OLTC with voltage regulation for fluctuating grid environments
Precision voltage control in all 3 Phase Step Down Transformer models

✅ Transformer Enclosure & Protection Features

Tank Type: Hermetically sealed and anti-corrosion coated
IP Rating: IP23 standard; IP54 optional for marine or humid zones
Integrated with pressure relief valves, oil level gauges, thermometers, and optional Buchholz relay and surge arresters

✅ Installation Guidelines

Delivered ready for installation—factory-filled, tested, and sealed
Suitable for radial or ring distribution networks
Mountable on concrete pads or steel base structures
Detailed wiring and grounding diagrams provided

✅ Lead Time & Logistics

Standard Units: 20–30 days
Custom Builds: 45–65 days
Global shipping available by container or pallet; compliant with EU and U.S. import regulations

✅ Certifications & Testing

Standards: IEC 60076, ANSI C57, IEEE, CE, UL, CSA
Each 3 Phase Step Down Transformer includes routine test reports; type and special tests upon request
Third-party inspection (SGS, TUV, BV) available

✅ Wholesale & Bulk Supply

We support large-volume orders, government tenders, and private-label branding for 3 Phase Step Down Transformers
Fast manufacturing cycles and flexible MOQ for resellers and project integrators

✅ Other Transformer Models Available

100 kVA, 250 kVA, 315 kVA, 500 kVA 750 KVA 1000 KVA 1500 KVA 2000 KVA 2500 KVA oil-filled transformers
Dry-type, cast resin, pole-mounted, and substation-type configurations
Inverter step-down transformers for solar and battery energy storage systems

✅ FAQ: 3 Phase Step Down Transformers (200 kVA)
Q: What is the expected lifespan?
A: 25–30 years under normal load and climate conditions.
Q: Can this transformer be used in 50 Hz grids?
A: Yes, dual-frequency compatible versions (50/60 Hz) are available.
Q: Does the unit meet EU/UK certification standards?
A: Yes, it is CE marked and fully compliant with IEC and BS requirements.

✅ Why Choose Energy 200 kVA 3 Phase Step Down Transformer – 11 kV to 400 V

Energy Transformer's 200 kVA oil-immersed 3 phase step down transformer is built for dependable voltage conversion from 11 kV to 400 V in commercial, utility, and light industrial applications across Europe and North America. Ideal for factories, warehouses, renewables, and urban distribution.

Key Advantages:

• Standards Compliant: Built to IEC, ANSI, and IEEE standards for EU, UK, and U.S. grid compatibility.

• Efficient Design: Copper windings, ONAN cooling, and low-loss core ensure long-term performance.

• Flexible Configuration: Standard Delta-Wye; other vector groups and tap options available.

• Durable & Weatherproof: Hermetically sealed, outdoor-rated enclosure (IP23); optional IP54.

• Quick Turnaround: Stock units available with short delivery to EU and U.S. ports.

Energy Transformer offers reliable, efficient, and compliant 3 phase step down transformers for your 11 kV to 400 V distribution needs. Whether for a public utility, solar farm, or data center, our 200 kVA transformer delivers peace of mind and long service life.

📩 Contact us today for technical drawings, quotations, and delivery schedules.