Application
Three phase isolation transformer is an energy saving type of power transformer we provided, which has a power rating of 300VA~1600KVA and is suitable for circuits with voltage less than 660V and frequency of 50~60Hz. This kind of power transformer has a spread use in subway, high buildings, airports, stations, mining enterprises, tunnels and other power transmission and distribution places.

Technical Parameter
Input voltage rating: three phases 380V, single phase 380V, single phase 220V
Frequency: 50Hz~60Hz
Efficiency: ≥95%
Temperature rise: <60
Wave distortion: <0.1%
High voltage test: not breakdown with 2500V voltage for 1 min
Insulation resistance: ≥500MΩ
Primary to secondary insulation resistance: ≥500MΩ

Service conditions
1. Altitude: ≤5000m
2. Environment temperature: -15~45℃
3. Relative humidity: ≤90%

Feature
1. This type of power transformer adopts mid-line earthed design and has the advantage of high isolation, which can against interfere of common code and other mid-lines in power grid.
2. Our isolation power transformer has a good N-G performance and it can change the three wires connection to four wires connection. Besides, it can effectively against impulse interference and high-frequency noise interference with N-G by adding isolation device.
3. The power transformer is by vacuum paint dipping to achieve the insulation grade of F class or H class, which provides high reliability and long lifetime.
4. Customers can customize their own power transformers according to their application conditions. The items that can be customized includes of input voltage, output voltage, link categories, the number and location of tap, distribution of winding capacity, the function method of rectifying circuit, having shell or not and so on.