450 kVA Transformer Manufacturers & Suppliers
Subian Electric manufactures the 450 kVA transformer rating at our factory in Xuzhou, Jiangsu, China, as part of a complete distribution transformer range from 30 kVA upward. It is built for 11kV, 20kV and 33kV primaries with a 400V/230V secondary, in oil-immersed and dry-type forms.
Manufacturing is in-house – core, winding, drying, testing – with a 50,000-square-metre base, 350+ employees and routine test reports for every unit produced under ISO9001 and CE controlled processes.
Send your primary voltage and load data, and our engineers will confirm the rating, loss figures and factory quotation.
Since 2019 · 50,000m² · 350+ Staff
Distribution Transformers We Manufacture
Oil-immersed and dry-type distribution transformers from 30 kVA upward, with the 450 kVA rating available in standard and project-specific configurations.
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10kV Dry-Type Transformer-SCBH series Amorphous Alloy
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20-35KV Dry-Type Transformer
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20-35KV SCB Series Epoxy Resin Dry-Type Transformer
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20KV Oil-immersed Distribution Transformer
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35KV Oil-immersed Power Transformer
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6-10KV Oil-Immersed Power Distribution Transformer
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Current Transformer –10KV Indoor High Voltage
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Current Transformer–LMZK Wound Current Transformer300/5a
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Current Transformer–LSY-10 transformer Integrated CT
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current transformer–LXK high voltage zero sequence
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dry type distribution transformer-6-10 KV SCB series epoxy resin cast
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Electrical Transformers–JDZ – 10 Power Voltage
What Is a 450 kVA Transformer?
A 450 kVA transformer is a three-phase distribution transformer rated for 450 kilovolt-amperes of throughput, stepping a medium-voltage supply down to the low-voltage network that feeds factories, commercial buildings, residential areas and agricultural loads. It sits one step above the 400 kVA class and suits loads around 360 kW at a typical 0.8 power factor.
Ratings at this level are usually selected from the calculated peak demand plus margin. The transformer runs energised continuously, so the loss specification – especially no-load loss – is a significant part of its lifetime cost, and comparing guaranteed losses between suppliers matters more than the nameplate price.
- 360 kW class at 0.8 pf – matches the real load this rating serves.
- 11 / 20 / 33 kV primaries – with a 400V/230V secondary.
- Oil or dry type – outdoor and indoor options.
- In-house core & winding – controlled production and testing.
- Tested per unit – loss and dielectric reports supplied.
- OEM & wholesale – private labels and volume programmes.
Build Options
Choose the technology by installation site and fire rules:
Oil-immersed (ONAN)
the economical standard for outdoor pole, plinth and substation duty.
Dry-type (cast resin)
an oil-free 450 kVA unit for indoor and high-rise installations.
Custom ratios & tappings
built to match non-standard networks and voltage drops.
450 kVA Transformer Technical Data
| Parameter | Specification |
|---|---|
| Rated capacity | 450 kVA, three-phase |
| Primary voltage | 11 / 20 / 33 kV (per project) |
| Secondary voltage | 400 V / 230 V |
| Cooling | ONAN (oil) / air (dry) |
| Vector group | Dyn11 / Yyn0 |
| Frequency | 50 / 60 Hz |
| Standard | IEC 60076 / GB 1094 |
450 kVA Loading and Full-Load Current
The real power available is the kVA rating multiplied by the power factor – about 360 kW at 0.8 and 450 kW at unity. Full-load current on the 400V secondary is 450,000 / (1.732 x 400), roughly 650 A per phase; on an 11kV primary it is about 23.6 A.
These figures set the LV cable, breaker and busbar sizes downstream. The feeder conductor is then selected for the current with margin for continuous loading and voltage drop over the run, and confirmed by the local code.
Indicative full-load figures
| Secondary 400 V | approx. 650 A per phase |
|---|---|
| Primary 11 kV | approx. 23.6 A |
| Primary 33 kV | approx. 7.9 A |
| Real load at 0.8 pf | approx. 360 kW |
Controlled Production From Core to Test
Core cutting, coil winding, vacuum drying and complete testing are performed in-house, so every 450 kVA unit is traceable from material to its test report.
Winding & Core
Controlled winding and core stacking give consistent impedance and loss values.
Drying & Oil Fill
Vacuum drying protects the insulation system before filling or casting.
450 kVA Transformer Price & Quotation
Ask for the current factory price with your primary voltage and quantity. We confirm the guaranteed losses and outline drawing in a written quotation – single units and programmes are both supported.
OEM / ODM & Wholesale Supply
Distributors resell the 450 kVA rating under their own brand with private-label plates and documentation.
OEM / ODM
Factory-Direct
Custom ratings, tappings and branding.
Factory direct · Test docs · Export support
Wholesale Supply
Volume Pricing
Container quantities with mixed models.
Factory direct · Test docs · Export support
Distributor Support
Channel Partners
Technical data and account management.
Factory direct · Test docs · Export support
400 kVA or 450 kVA – Which Rating Fits?
Standard preferred ratings near this level include 400 kVA and 500 kVA. The 450 kVA unit fits where the calculated load and growth fall between the two, or where the network operator’s list includes it. The decision should follow a load calculation, not guesswork.
If the load is close to 400 kVA but has motor-starting peaks, the 450 kVA rating gives useful headroom at moderate extra cost. Our engineers review the duty cycle and confirm the economical choice before you order.
Choosing a 450 kVA Transformer Supplier
Compare no-load and load losses, core material, winding conductor and the temperature-rise margin – these define efficiency and life. Check that the routine test report is issued per unit and that type-test evidence exists for the design.
Subian manufactures under ISO9001, ISO14001, ISO45001, CE and UL certified systems and publishes its credentials openly, including a 110 kV transformer type-test report and an open-door factory policy with VR tour.
Confirm the supplier can adjust impedance, tappings and bushings for your project – a factory that engineers rather than resells can match the unit to your network.
Certifications & Quality Assurance
Our distribution transformer production runs under ISO9001, ISO14001 and ISO45001 systems with CE and UL certification and type-test evidence to 110 kV class.
Product Certifications
10 kV Dry-Type Transformer Certificate
35 kV Transformer CB Certificate
35 kV Transformer CE Verification
Transformer CE Certificate
Dry-Type Transformer Test Verification
ISO 14001 Environmental Management
ISO 45001 Health & Safety
ISO 9001 Quality Management
110 kV Transformer Type Test Report
UL Certificate of Compliance
450 kVA Transformer Manufacturers & Suppliers FAQ
Questions buyers ask about the 450 kVA rating, loading and specification.
How many kW can a 450 kVA transformer supply?
What is the full-load current of a 450 kVA transformer?
Is 450 kVA a standard transformer rating?
What is the difference between kVA and kW on this rating?
How do I replace an old 450 kVA transformer?
Contact Subian
Need the Right Specification?
Tell us your target market, product type, quantity and technical requirements. Our team will help you identify a suitable configuration for your project.