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Substation Transformers for Power Grids
Power and distribution transformers for utility substations and distribution networks.
A substation transformer changes grid voltage between transmission and distribution levels, so it must combine low losses, high short-circuit strength and stable voltage regulation. We supply oil-immersed power transformers up to 220 kV, including SZ 110 kV units up to 180,000 kVA, and distribution transformers from 10 to 35 kV.
More than 2,200 distribution transformers exported to utility networks in Kenya, Ethiopia, Sudan and Russia.
What We Supply
Oil-immersed power transformers, 110–220 kV
SZ oil-immersed power transformers, 110 kV, 6,300–180,000 kVA
S(Z) oil-immersed transformers, 35 kV, 30–31,500 kVA
S-M distribution transformers, 10–20 kV, 30–4,000 kVA
Pole-mounted transformers for rural grids
How We Deliver Your Project
Every Yuantong project follows the same controlled process, from technical review to delivery.
01
Requirements & Design
We review capacity, voltage, standard and site conditions, then complete the electrical design with computerized design software and 3D structural modelling.
02
Manufacturing
Cores, coils and assemblies are produced in our Hai'an, Jiangsu factory, including silicon steel cutting, coil winding, vacuum casting and drying.
03
Factory Testing
Every unit is tested in our test hall and receives 100% inspection of appearance and function before release.
04
Packing & Delivery
Units are packed in export wooden cases and delivered by road in China or shipped by sea from Shanghai.
Standards & Quality
Our transformers are designed and built to international and Chinese national (GB) standards as specified by the customer. Our management systems are certified to ISO 9001, ISO 14001 and ISO 45001, and our low-voltage products hold CE attestation of conformity under the Low Voltage and EMC directives.
Project Information
Key facts of this project.
Typical Products
Power & distribution transformers
Voltage
10–220 kV
Capacity
30–180,000 kVA
Reference Projects
Kenya, Ethiopia, Sudan, Russia
Standards
International & GB