1. Feature The Isolation Transformer are indoor air self cooling ones, which is available in the circuit of AC 50Hz and voltage less than 1000V. Input/output voltage of all transformers can be made according to order. Number of phase has three-phase and single-phase or three-phase input with single-phase/two-phase output etc. The max. Rated power will be up to 1000kVA.Jiangsu Dinghong Electric Power Co.,Ltd. is a professional cross-border e-commerce electric equipment supplier,which located in Haian, Jiangsu where close to Shanghai. Dinghong was established in 2006. Now it is mainly divided into three business divisions: box substation business Division, high and low voltage complete business Division, power transformer Business Division; The products manufactured by the company have been tested and identified by relevant authorities; And has been widely used in electric power, textile, paper, wind power, chemical, fire system, residential areas and other fields. We will continue to update the market concept, science and technology as the guide to the quality of the development of the business philosophy, to private enterprise flexible mechanism to share our current interests with our customers, common service for China's electrical modernization.Product advantage： 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.Our Service: We provide technical solutions and price solutions for our customers for free.The newly purchased products are provided with online assistance for installation and debugging. The products are under the lifelong service system. If problems occur in normal use, we will provide solutions within one working day after receiving user's feedback. We will try our best to get the product up and running as soon as possible. And there are regular visits by professional technicians to ensure the long-term, safe and reliable use of our products.2. Main Technical Data for Single Phase Isolation Transformer Phase No.: Single phase Input voltage: 110V/120V/200V/220V/230V/250V etc. optional Output voltage: 110V/120V/200V/220V/230V/250V etc. optional Frequency: 50Hz-60Hz Ambient temperature: -10 º C~+40º C Relative humidity: <95% Temperature rise: < 60 º C Withstand voltage: 1500V/min Insulation resistance: > 2MΩ3. Main Technical Data for Three phase Isolation transformer Phase No.: Three phase Input voltage: 200V/220V/230V/240V/360V/380V/400V/415V etc. optional Output voltage: 200V/220V/230V/240V/360V/380V/400V/415V etc. optional Frequency: 50Hz/60Hz Ambient temperature: -10 º C~+40º C Relative humidity: <95% Temperature rise: < 60 º C Withstand voltage: 1500V/min Insulation resistance: > 2MΩ4. Application It is available in the electric supplying of electronic instruments, machinery equipment, lighting, rectifying device etc.