Трехфазный понижающий трансформатор мощности сухого типа, 120 В, 220 В до 240 В, 380 В, 440 В, 10 кВт, 20 кВт, 30 кВт, 40 кВт, 3 фазный трансформатор

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Product Overview



QSG/SG three-phase dry type isolation transformer is a new generation energy-saving power transformer developed by our factory based on international similar products and combined with China’s national conditions, from 300VA to 1600KVA, in line with international and national standards such as IEC439 and GB5226. The winding adopts the method of winding out the hole row. The transformer is vacuum-impregnated, so that the insulation grade of the transformer reaches F class or H class, and the product performance reaches the advanced level at home and abroad. QSG/SG series three phase dry type isolation transformer is widely used in circuits with AC 50Hz to 60Hz and voltage below 2000V. all can be specially customized as per different requirements of the end users.

Symbol Meaning

Technical Date Sheet

Three phase
Input voltage
380V .660V.440V.220V or Customized
Output voltage
220V.1140V.690V.660V.440V. 415V.400V.380V .220V.200V.110V or Customized
Output voltage accuracy
Voltage change rate
Output waveform distortion
No distortion (compared to the input waveform)
Insulation class
Class F, Class H; IP 00, IP20 etc.
Working efficiency
Applicable frequency
Connection method
Y/D or customized
Overload capability
More than 1.2 times of the rated load to work for 4 hours
Sound level
≤50dB(within 1m)
Temperature rise
Insulation resistance
Service life
Working environment
Temperature: -20℃~+45℃, Humidity: ≤95% RH no condense
Installation environment
Non-corrosive gas and conductive dust
VDE0550, IEC439, JB5555, GB226
Cooling method

Products Description

Q 1. What's the payment term?
A. We accept TT,30% deposit and 70% balance against copy of BL.

Q 2. How's the delivery time ?
A.Usually it will take about 7-20 days for production. For sample usually in 1 week.

Q 3. Tell me the standard of package?
A. For the small capacity, color box as inner package and carton as delivery package. For big capacity, use strong wooden case for protection.

Q 4. What kind of material of transformer?
A. For servo type transformer, we have two types, one 100% copper and the other is copper with aluminum. It depends on your requirement . In fact, those two have no difference if normal work well. Only except the long life. Copper is better and also higher price. For relay type transformer, we use toroidal coils, the material is aluminum. comparing with square coils, toroidal coils with high efficiency.

Q 5.Could you offer Form A or C/O ?
A. It's totally not a problem. We can prepare relative documents to foreign affairs office or other offices to apply for this certificate.

Q 6.Would you accept to use our logo ?
A.Our logo is ZX. If your order, has good quantity, it's absolutely no problem to do OEM. But if you use our logo ZX, it will be high appreciated.

Q 7.We want to know month capacity.
A. It depends on which model. For example for relay type small capacity , month capacity can reach near 10000pcs and big capacity near 2000pcs.

Q 8.Where is your market?
A. Our products are popular in North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, Mid
East, Eastern Asia, Western Europe and so on. Some of them are our regular customers and some of them are developing. We hope you can join us and make mutual benefits from our cooperation.

Q 9. What kind of certificate you have ?
A. Our company already obtained CE , ISO9001, PCT, SGS. design and technical patents certificates.

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