Dry Distribution Transformer
Rated Power: Up to 6300Kva (Customized)
Primary Voltage: 6kV, 6.3kV, 6.6kV, 10kV, 10.5kV, 11kV, 20kV, 22kV (Customized)
Secondary Voltage: 0.4kV, 0.8kV, etc. (Customized)
Tap Range: ±2 X 2.5 , ±5 (Customized)
Vector Group: Dyn11, Yyn0 (Customized)
Frequency: 50Hz, 60Hz (Customized)
Phase: 3 phase
Zhejiang Tianrun Electric Co., Ltd. is one of the leading manufacturers and suppliers of dry distribution transformer in China. We are committed to providing high quality customized products with competitive price. We warmly welcome you to buy bulk advanced dry distribution transformer from our factory. Also, quotation is available.
Product Overview
The SCB11 is an upgraded general-purpose outdoor dry-type transformer optimized on the basis of traditional basic models and fully compliant with IEC international standards. It adopts vacuum epoxy resin casting and LV foil winding technology, with refined core step-lamination structure to optimize magnetic circuit, reduce hysteresis loss and lower operating temperature rise. Upgraded winding layout improves loaded performance, while retaining inherent dry-type advantages including flame retardancy, maintenance-free operation, low noise and strong grid adaptability. Equipped with standard temperature control and optional cooling & protection devices, it fits global 50/60Hz indoor power distribution scenarios. Balancing better efficiency and stability than SCB10 with excellent cost performance, it serves as an ideal transitional upgrade model for ordinary overseas commercial and industrial projects.
Core Exclusive Advantages
Optimized Magnetic Circuit Design
The optimized magnetic circuit structure effectively reduces transformer no-load loss and operating temperature rise. It delivers superior energy-saving effects and more reliable long-term electrified operation, maintaining stable working status during prolonged continuous power-on scenarios.
Enhanced Load Adaptability
The improved winding structure greatly strengthens overall load capacity and dynamic adaptability to fluctuating grid loads. It effectively suppresses local overheating risks under variable load conditions, ensuring safe and stable operation under complex and frequently changing working environments.
Advanced Vibration and Noise Suppression
Upgraded vibration damping and noise suppression structures significantly reduce operating vibration and noise. With excellent acoustic environmental performance, the transformer is highly adaptable to densely populated working and indoor service areas with strict environmental requirements.
Excellent Comprehensive Cost Performance
The product achieves comprehensive performance upgrades without excessive cost growth. It balances upgraded technical indicators and economic benefits perfectly, providing highly cost-effective solutions for old equipment renovation, replacement and upgrading project.
Meaning of product model
Note: More technical parameters of the transformer can not be reflected in the model, more information is required to check the technical parameters.
Product Parameter
Technical Parameter Table of 6kV, 10kV 30kVA ~ 2500kVA Non-exciting Voltage Regulating Distribution Transformer
|
Rated capacity (kVA) |
Voltage combination and tap range |
Vector group |
No-load loss (W) |
Load-loss (W) |
No-load current (%) |
Short-circuit impedance (%) |
||
|
High voltage (kV) |
High voltage tap range (%) |
Low voltage (kV) |
||||||
|
30 |
6 6.3 6.6 10 10.5 11 20 22 |
±5% ±2x2.5% |
0.4 |
Dyn11 Yyn0 |
170 |
710 |
2.0 |
4.0 |
|
50 |
240 |
1000 |
2.0 |
|||||
|
80 |
330 |
1380 |
1.5 |
|||||
|
100 |
360 |
1570 |
1.5 |
|||||
|
125 |
420 |
1850 |
1.3 |
|||||
|
160 |
480 |
2130 |
1.3 |
|||||
|
200 |
550 |
2530 |
1.1 |
|||||
|
250 |
640 |
2760 |
1.1 |
|||||
|
315 |
790 |
3470 |
1.0 |
|||||
|
400 |
880 |
3990 |
1.0 |
|||||
|
500 |
1040 |
4880 |
1.0 |
|||||
|
630 |
1170 |
5960 |
0.85 |
6.0 |
||||
|
800 |
1360 |
6960 |
0.85 |
|||||
|
1000 |
1590 |
8130 |
0.85 |
|||||
|
1250 |
1880 |
9690 |
0.85 |
|||||
|
1600 |
2200 |
11700 |
0.85 |
|||||
|
2000 |
2740 |
14400 |
0.70 |
|||||
|
2500 |
3240 |
17100 |
0.70 |
|||||
Note: The technical parameters of our transformers are for reference only. Customized solutions are available, with specifications adjustable according to project-specific requirements.
Operating Environmental Conditions
|
Name |
Unit |
Project needs value |
|
|
Ambient temperature |
Maximum daily temperature |
℃ |
40 |
|
Minimum daily temperature |
-25 |
||
|
Maximum diurnal temperature range |
K |
25 |
|
|
Average temperature in hottest month |
℃ |
30 (or provided by the project unit) |
|
|
Maximum annual average temperature |
20 (or provided by the project unit) |
||
|
Humidity |
Average daily relative humidity |
% |
≤95 |
|
Average monthly relative humidity |
≤90 |
||
|
Height |
m |
≤1000 |
|
|
Intensity of solar radiation |
W/cm2 |
0.1 |
|
|
Maximum ice thickness |
mm |
20 |
|
|
The average maximum wind speed at 10m above the ground for 10 minutes |
m/s |
35 |
|
|
Seismic fortification capability |
Ground level acceleration |
m/s2 |
3 |
|
Safety factor for three cycles of resonance |
≥1.67 |
||
|
Installation site (indoor/outdoor) |
Confirm with project unit before supply |
||
|
Atmospheric corrosivity levels (C1/C2/C3/C4/C5/CX) |
Confirm with project unit before supply |
||
|
Protective rating of belt shell |
IP31, IP30, IP21, IP20 (or provided by the project unit) |
||
Differences among SCB10, SCB11, SCB12, SCB13, SCB14, SCB18
|
Dimension |
SCB10 |
SCB11 |
SCB12 |
SCB13 |
SCB14 |
SCB18 |
|
Core material |
Standard grain-oriented silicon steel |
Higher-grade silicon steel |
High-permeability thin-gauge silicon steel |
Optimized magnetic circuit, some use amorphous alloy |
Premium high-permeability silicon steel |
Ultra-thin high-permeability silicon steel, 3D wound core |
|
No-load loss |
Highest |
High |
Medium |
Low |
Lower |
Lowest |
|
Load loss |
Highest |
High |
Medium |
Low |
Low |
Lowest |
|
Noise level |
Loudest |
Louder |
Quiet |
Quieter |
Quieter |
Quietest |
|
No-load current |
Highest |
High |
Medium |
Low |
Lower |
Lowest |
|
Partial discharge |
Highest |
High |
Medium |
Low |
Low |
Lowest |
|
Purchase cost |
Lowest |
Lower |
Medium |
Higher |
High |
Highest |
|
Size & weight |
Most compact |
Compact |
Slightly larger |
Larger |
Larger |
Largest |
|
Typical use |
Temporary replacement of old equipment |
General industry, backup |
Budget-sensitive new projects |
Legacy retrofit, noise-sensitive |
Commercial buildings, schools, hospitals, industrial, municipal |
Data centers, financial hubs, commercial complexes, renewable energy, critical loads |
Summary: SCB10 to SCB18 form an efficiency ladder - higher numbers mean better core materials, lower losses, quieter operation, and higher upfront cost, but lower long-term operating cost.
Product Application
This dry‑type transformer is well‑suited for power distribution supporting of newly‑built overseas commercial real estate, small‑and‑medium‑sized manufacturing plants, hotels, high‑rise apartments, indoor substations in high‑rise buildings and industrial parks.
- Typical working conditions: Perfect for general industrial and commercial scenarios characterized by high daytime operating loads, low night standby loads and frequent regular start‑stop cycles. It can stably handle periodic load changes and adapt to common peak‑valley power consumption features of commercial and industrial facilities.
- Target application markets: Widely deployed in overseas turn‑key and foreign‑trade projects covering the Middle East, Latin America and Southeast Asia. It delivers moderate performance improvement on the basis of reliable cost‑effectiveness, balancing technical indexes and project budget to satisfy local market mainstream upgrading demands.
Proccess of Transformer
1-Wire‑wound winding of transfomer
2-Foil‑wound winding of transfomer
3-Vacuum casting of transformer
4-Epoxy resin casting of transfomer
5-Coil assembling over core
6-HV porcelain bushings of oil immersed transformer
7-Lead insulation taping and welding of transfomer
8-Vacuum oil filling of transformer
9-Tank sealing of transformer
Testing of Transformer
1-Measurement of winding resistance testing of transformer
2-Measurement of voltage ratio and check of phase displacement testing of transformer
3-Separate‑source AC withstand voltage testing of transformer
4-Measurement of no‑load loss and no‑load current of transformer
5-Measurement of short‑circuit impedance and load loss of transformer
6-No load loss and no load current testing of transformer
7-Temperature‑rise test of transformer
8-Partial‑discharge measurement of transformer
9-Winding ressitant and voltage ratio testing of transformer
FAQ
Q1: What's Difference between SCB11, SCB10 and SCB13?
A: The numeric suffix denotes loss grade. SCB11 has lower losses than SCB10, meeting IEC 60076-11 efficiency levels; SCB13 is even higher efficiency. All share identical cast-resin construction.
Q2: What standards apply?
A: IEC 60076-1, IEC 60076-11, IEC 60076-12, IEC 60529.
Q3: Copper vs aluminum winding - how to choose?
A: Copper: smaller size, lower losses, higher mechanical strength, better short-circuit withstand, higher cost. Aluminum: lighter, cheaper, but larger and slightly higher losses. Copper recommended for export and high-spec projects.
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