35kV Oil-Immersed Power Transformer
The SUT 35kV series power transformers feature an optimized design and improved manufacturing processes, with enhanced mechanical strength, heat dissipation and overall operating reliability.
The active part adopts a reinforced clamping structure to provide greater mechanical stability during transportation and operation, while improving resistance to short-circuit forces. Carefully designed oil ducts within the winding assembly facilitate heat dissipation and help control temperature rise during continuous operation.
The transformer is designed for reliable long-term service with low losses, low noise and stable electrical performance. It is suitable for power distribution applications in industrial, urban and rural networks.
Optimized Core Design
The transformer uses a high-grade silicon steel core and an optimized magnetic circuit design to help reduce no-load losses and improve operating efficiency.
Reinforced Clamping Structure
The active part adopts a reinforced clamping structure to improve mechanical stability, transportation impact resistance and short-circuit withstand capability.
Efficient Heat Dissipation
Longitudinal oil ducts within the winding assembly facilitate heat dissipation and help control winding temperature rise during operation.
Flexible Winding Configuration
Copper or aluminum windings can be provided according to product design and customer requirements.
Adjustable Voltage Configuration
The transformer can be equipped with an appropriate tap adjustment configuration to meet different system voltage requirements.
Reliable Operating Performance
The transformer is designed for long-term operation with low losses, low noise and stable performance in power distribution applications.
|
Meaning of Model Number |
S |
□ |
□ |
□ |
- |
□ |
/ |
35 |
|
|
Three-phase |
"F" for forced air cooling; natural cooling has no designation |
"Z" for on-load tap-changing; off-circuit tap-changing has no designation |
Performance level code |
|
Rated capacity kVA |
|
Voltage class kV |
|
Model |
Rated capacity （kVA） |
Vector group |
Voltage combination（kV） |
No-load loss75℃ （A） |
Load loss（W）75℃ （A） |
No-load current75℃ （A） |
Impedance voltage75℃ （A） |
||
|
|
|
|
High voltage |
Tapping range |
Low voltage |
|
|
|
|
|
SZ20 |
31500 |
Yd11 |
35 |
±3x2.5% |
10.5 |
14.2 |
104.4 |
0.24 |
0.24 |
|
SZ20 |
25000 |
Yd11 |
35 |
±3x2.5% |
10.5 |
11.9 |
88 |
0.24 |
0.24 |
|
SZ20 |
20000 |
Yd11 |
37 |
±3x2.5% |
10.5 |
10.1 |
74.4 |
0.28 |
0.28 |
Possible Configuration Options
Rated Capacity
Transformer capacity can be configured according to project power requirements.
Voltage Configuration
Primary and secondary voltage configurations can be specified according to system requirements.
Winding Configuration
Copper or aluminum winding options can be provided according to product design and project requirements.
Tap Configuration
Suitable tap adjustment configurations can be provided according to the required voltage conditions.
Industrial Power Distribution
Suitable for factories, manufacturing facilities and other industrial power distribution systems.
Urban Power Distribution
Designed for power transformation and distribution in urban electrical networks.
Rural Electrification
Suitable for rural power distribution networks and related infrastructure projects.
Utility Power Systems
Applicable to substations and power distribution systems requiring 35kV-class transformer equipment.
Routine Testing
Electrical and mechanical performance is checked during product inspection according to applicable technical requirements.
Type Testing
Type testing is carried out where applicable to verify the performance and design characteristics of the transformer.
Special Testing
Additional testing can be conducted according to project-specific requirements.
Professional Manufacturing
SUT focuses on transformer and power distribution equipment manufacturing.
Project-Based Configuration
Transformer specifications can be configured according to voltage, capacity and actual application requirements.
Quality Control
Manufacturing and inspection procedures are applied throughout the production process.
Complete Power Distribution Portfolio
SUT provides transformers, high-voltage switchgear and pole-mounted circuit breakers for power distribution projects.
What is a 35kV power transformer?
A 35kV power transformer is used to transform electrical energy between voltage levels in medium- and high-voltage power systems.
Is this an oil-immersed transformer?
Yes. This product is an oil-immersed power transformer designed for power transformation and distribution applications.
What rated capacities are available?
The current product information includes 20,000 kVA, 25,000 kVA and 31,500 kVA configurations. The available range depends on the specific model and technical design.
What is the voltage rating?
The series is designed for 35kV-class applications, with the exact voltage configuration depending on the specific model.
What is the tap range?
The listed configurations use a tap range of ±3 × 2.5%.
Are copper and aluminum windings available?
Yes. Copper or aluminum winding configurations can be provided according to product design and customer requirements.
Can the transformer be customized?
Yes. SUT can provide customized transformer configurations according to customer requirements and project conditions.
Where are 35kV power transformers used?
They are suitable for industrial, urban and rural power distribution networks, as well as applicable utility and infrastructure projects.
Has the transformer been tested?
The SZ13-20000/35 transformer manufactured by SUT successfully passed routine, type and special tests conducted by the National Transformer Testing Center.
