|Usage:||Step Down||Primary Voltage:||480V|
20KVA step down power transformer,
copper winding transformer 220V,
step down power transformer 480V
20KVA Step Down Three Phase Auto Transformer 480V/220V/208V/120V/110V
The autotransformer is a transformer with only one winding. When used as a step-down transformer, a part of the turns are drawn from the winding as the secondary winding. When used as a step-up transformer, the applied voltage is only applied to part of the turns of the winding. Usually the part of the winding that belongs to both the primary and the secondary is called the common winding, and the rest of the autotransformer is called the series winding. Compared with the ordinary transformer, the autotransformer of the same capacity is not only small in size, but also more efficient, and the transformer The larger the capacity and the higher the voltage, the more prominent this advantage. Therefore, with the development of power systems, the improvement of voltage levels and the increase of transmission capacity, self-coupling transformers have been widely used due to their large capacity, low loss, and low cost.
|Vacuum Pressure Impregnation|
|Rated Power||Upto 5000KVA|
|Input||Voltage||Rated Voltage ≤ 1000V|
|Current||Rated power/ Input Voltage / 1.732|
|Output||Voltage||Rated Voltage ≤ 1000V|
|Current||Rated power/ Output Voltage / 1.732|
|Duty Cycle||100% Continuous|
|No Load Current||<4%|
|Withstand Voltage||2500V, 1 Minute, No Flashover and Damage|
|Coil Temperature Rise||≤120K|
Natural Convection (AN)
Forced Air (AF)
|Working Environment||Ambient Temperature: -10℃ to +45℃|
|Relative Humidity: ≤95% (non-condensing)|
|Protection Degree||Indoor IP20 (NEMA 1)||Outdoor IP54 (NEMA 3)|
|Standards||In Accordance with IEC and EN|
1. Q: Can I have a sample order?
A: Yes, we welcome sample order to test and check quality.
2. Q: What is the lead time?
A: Sample time 3-7 days, we usually ship by DHL, UPS, FedEx,etc. Mass production time 7-25 days.
3. Q: How long is the warranty?
A: 24 monthes from B/L. If there are any accessory problems,just provide the photos of damaged accessory,then we will provide free service. According to the number of products,we will provide easily damaged accessories for free. we also can provide technical support if you need.
4. Q: Is OEM/ODM available?
A: Yes,it is! We are manufacturer with our own R&D team, we can customize products according to customer's drawing or requirements.
a. Customized color and special function.
b. Customized box.
c. Print customer's logo(MOQ:≥10pcs).
d. Your other ideas about product, we can help you design and put them into production. The above customized services must be confirmed before production.
5. Q: How to control the products quality?
A: Our company owns the core technology ,all kinds of products hold CE certificate. We have professional engineers. Workers are strictly required to make products according to the drawings. Each process has technical instructors.The QC supervisors will regularly inspect the production. We will do products performance tests during production, and comprehensive quality tests when the products is completed.