Zhejiang Jiangshan Hengli Electrical Co., Ltd. is one of the leading manufacturers and suppliers of triple phase transformer in China. If you're going to wholesale durable triple phase transformer made in China, welcome to get pricelist from our factory. All customized products are with high quality and low price.
What Exactly Is a Triple Phase Transformer
You might also see it named three phase transformer in engineering drawings. This piece of equipment adjusts high voltage from public power grids down to the safe, usable voltage that industrial machinery and building power systems need.Single phase transformers only work well for small household loads, while triple phase models handle heavy continuous power output-this makes them the standard choice for all commercial and industrial power projects.
Lots of overseas project buyers come to us looking for solid triple phase transformers to match their power distribution setups. We've been manufacturing this equipment for more than 20 years, supplying both oil immersed and dry type versions to clients across over 20 countries. Unlike generic low-cost transformers on the market, we pick every raw material ourselves and run full performance testing before delivery to cut your later maintenance trouble.
We give buyers two winding material choices: oxygen-free copper or aluminum coils, depending on your budget and long-term operation needs. To extend service life and resist sudden grid short-circuit surges, we add these practical structural upgrades on all our units:
- Optimized multi-layer insulation layout to boost short-circuit withstand capacity
- Low-loss cold rolled silicon steel core, which cuts idle power waste daily
- Tightly wound cylindrical high voltage coils with anti-vibration design
- Locked and reinforced bolts on every joint to avoid loose parts after years of outdoor use
Available Capacity & Full Voltage Specifications
Scope of Supply
Our production line covers power ratings from small 10kVA units up to heavy-duty 5000kVA transformers, matching small workshop upgrades all the way to large regional distribution substations.
Voltage Matching Options
- High voltage (HV): 3.3kV, 6.6kV, 10kV, 10.5kV, 11kV, 20kV, 33kV, 35kV
- Low voltage (LV): 0.4kV, 3.3kV, 6.6kV, 10kV, 11kV
Tap adjustment support: ±5% or ±2×2.5% off-load tap changers, to fix voltage fluctuation issues in unstable rural or mining power grids
Two Main Types We Produce
1. ONAN Oil Immersed Triple Phase Transformer
This is our most popular outdoor model. We use fully sealed corrugated oil tanks instead of simple flat tanks. The corrugated wall absorbs oil expansion when temperature rises, and the full seal keeps rain, dust and humid air from touching internal windings. Mining sites, rural power stations and outdoor factory substations mostly pick this type, as it can run unattended outside for years.
2. Dry Type Triple Phase Transformer
No insulating oil inside this unit, so there is zero risk of oil leakage or fire spread. Clients mainly install these indoors: shopping malls, hospital power rooms, school electrical buildings and data center auxiliary power rooms. Local fire safety inspectors usually approve dry type transformers much faster for indoor construction projects.
Application Cases
Solar farm auxiliary substation in South Africa
We supplied 3 units of 1250kVA Dyn11 dry type transformers to connect solar panel arrays to regional power grids. The fire-proof design met local power bureau safety standards, and we finished custom wiring layout to fit their compact container substation space.
Residential district power upgrade in Southeast Asia
Multiple 250kVA oil immersed triple phase transformers with aluminum windings were delivered for community power distribution. Aluminum winding cut their upfront purchase cost without affecting daily residential power supply.
Factory & Service Strengths
All transformers follow IEC or other global power equipment standards. Every finished unit goes through complete factory acceptance testing (FAT): no-load loss test, insulation resistance test and tap switching test before packing.
We don't just sell standard models. If you have special site limits-such as limited installation space, extra high ambient temperature, or custom voltage ratios-our engineering team can redesign tank size, cooling structure and winding layout to match your project.
Our full support covers the whole project cycle: early power load calculation consultation, customized production, on-site installation guide documents, commissioning tips and long-term spare parts supply after shipment.
If you're sourcing triple phase transformers for your power project, send us your required kVA rating, input/output voltage and installation environment (indoor/outdoor, mine/urban) and we will send a detailed quotation within 24 hours.
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