Dry Type Step Down Transformer
Rated Power: Up to 6300kVA (Customized)
Primary Voltage: 6kV, 6.3kV, 6.6kV, 10kV, 10.5kV, 11kV, 20kV, 22kV (Customized)
Secondary Voltage: 0.48kV, 0.63kV, (Customized)
Tap Range: ±2×2.5%, ±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 type step down transformer in China. We are committed to providing high quality customized products with competitive price. We warmly welcome you to buy bulk advanced dry type step down transformer from our factory. Also, quotation is available.
Product Overview
The SCB14 is a high-grade ultra-low-loss dry-type transformer developed for high-standard green and continuous-operation projects, strictly following IEC international high-end specifications. It adopts top-grade low-loss silicon steel core and gapless precision lamination design, with finely optimized winding structure to suppress stray loss and achieve excellent energy-saving performance under both light and heavy loads. High-purity multi-stage vacuum casting ensures ultra-low partial discharge and superior insulation stability. Upgraded salt spray, moisture and pollution resistance adapt to harsh indoor environments. Equipped with high-precision temperature control and optional enhanced cooling and protection devices, it features low aging rate, large temperature rise margin and ultra-quiet operation, fully meeting advanced international energy efficiency certification and high-standard green engineering acceptance requirements.
Core Exclusive Advantages
Greatly Reduced No-load Loss
It features greatly reduced no-load loss via professional electromagnetic optimization. It delivers extremely high energy-saving benefits, perfectly fitting 24-hour long-term electrified operation and full-year standby scenarios, and effectively lowers long-term idle power consumption for continuous-operation projects.
Excellent Heavy-load Loss Control
The product achieves outstanding heavy-load loss control with optimized winding structure. It is highly ideal for industrial venues and key public buildings that require perennial high-load continuous operation, reducing operational heat generation and ensuring stable and economical long-term operation.
Upgraded Moisture and Corrosion Resistance
With upgraded moisture-proof and anti-corrosion treatment for core and structural parts, the transformer boasts enhanced environmental adaptability. It can operate stably in high-salinity and high-humidity coastal indoor environments, avoiding performance attenuation caused by damp and salt fog erosion.
Superior Ultra-quiet Performance
Equipped with professional vibration and noise reduction structures, the transformer realizes superior ultra-quiet operating performance. It supports flexible installation adjacent to offices, medical wards and teaching areas without generating noise disturbance, adapting to various noise-sensitive indoor scenarios.
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 (120℃) (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 |
Yyn0 Dyn11 |
130 |
640 |
2.0 |
4.0 |
|
50 |
185 |
900 |
2.0 |
|||||
|
80 |
250 |
1240 |
1.5 |
|||||
|
100 |
270 |
1415 |
1.5 |
|||||
|
125 |
320 |
1665 |
1.3 |
|||||
|
160 |
365 |
1915 |
1.3 |
|||||
|
200 |
420 |
2275 |
1.1 |
|||||
|
250 |
490 |
2485 |
1.1 |
|||||
|
315 |
600 |
3125 |
1.0 |
|||||
|
400 |
665 |
3590 |
1.0 |
|||||
|
500 |
790 |
4390 |
1.0 |
|||||
|
630 |
910 |
5290 |
0.85 |
6.0 |
||||
|
630 |
885 |
5365 |
0.85 |
|||||
|
800 |
1035 |
6265 |
0.85 |
|||||
|
1000 |
1205 |
7315 |
0.85 |
|||||
|
1250 |
1420 |
8720 |
0.85 |
|||||
|
1600 |
1665 |
10555 |
0.85 |
|||||
|
2000 |
2075 |
13005 |
0.7 |
|||||
|
2500 |
2450 |
15445 |
0.7 |
|||||
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) |
||
Product Application
This series of transformers is specially developed for high-standard overseas construction projects, applicable to premium infrastructure, high-end commercial and civil buildings, as well as new energy supporting scenarios. It perfectly adapts to high-load, long-term uninterrupted operation and harsh environmental application conditions of high-end projects.
- Green & Low-carbon Construction Scenarios: Applicable to overseas high-end green buildings and low-carbon demonstration parks. These projects feature strict energy efficiency assessment, long-term continuous power consumption and high-standard environmental operation requirements. The transformer fully matches the supporting power distribution needs of green low-carbon projects and meets the supporting construction standards of international ecological parks and energy-saving buildings.
- High-end Commercial & Coastal Real Estate Scenarios: Suitable for five-star hotels and high-end coastal real estate projects. It adapts to the high-comfort, low-interference power supply demands of high-end business and residential areas, and can stably operate in coastal high-humidity and high-salinity environments, meeting the long-term reliable power distribution requirements of premium real estate projects.
- Core Public & Infrastructure Scenarios: Widely used in large medical complexes and rail transit main control substations. Such scenarios require 24/7 uninterrupted power supply and have extremely high standards for power supply stability and equipment safety. This product serves as the core power distribution equipment to guarantee the continuous and safe operation of key public infrastructure.
- Digital & New Energy Supporting Scenarios: Applied to main power distribution of large and medium-sized data centers and supporting facilities for new energy grid-connected projects. It adapts to the perennial high-load operating state of data center equipment and the complex power distribution conditions of new energy grid connection, providing stable and efficient power support for digital infrastructure and new energy industrial projects.
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 is a step-down transformer?
A: A step-down transformer is a transformer that converts a higher input voltage to a lower output voltage. It has more turns in the primary (high-voltage) winding than in the secondary (low-voltage) winding, so the voltage is reduced while the current is increased proportionally, following the principle that power remains roughly constant on both sides. For example, a common distribution transformer steps 10kV down to 400V for building and factory use.
Q2: What is the purpose of a step-down transformer?
A: A step-down transformer reduces high transmission voltage to a lower, safer voltage that matches end-user equipment, making power distribution efficient and safe.
Q3: How do you know if a transformer is step up or step-down?
A: You can tell by checking the nameplate: if the rated primary voltage is higher than the secondary voltage, it is step-down; if the primary is lower, it is step-up. You can also compare the windings - the higher-voltage side has more turns and thinner wire, while the lower-voltage side has fewer turns and thicker wire.
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