SG-F photovoltaic isolation transformer overview:

Photovoltaic power grid-connected isolation transformers are generally used for solar inverters. Because the photovoltaic crystalline silicon panel itself has low photoelectric efficiency, the high efficiency of the transformer is especially required. The photovoltaic isolation transformer is equipped with a microcomputer intelligent time controller, which can be set to work during the day and stop at night to reduce no-load power loss; the temperature controller monitors the operating temperature of the transformer in real time, and controls the start and stop of the cooling fan. When the operating temperature of the transformer is too high, the set value is reached. When the critical temperature is reached, it will automatically stop disconnecting the transformer to protect the safety of the transformer body; it is equipped with a self-resetting overvoltage and undervoltage protector to prevent orphaned operation; a surge protector is installed to effectively prevent lightning damage to the equipment and improve the The safety factor of the power generation system is improved; a knife switch is installed on the grid-connected side to facilitate the effective operation and maintenance of the equipment. Weihao photovoltaic power generation grid-connected isolation transformers have various models and specifications for customers to choose, and can also be combined with one for two, one for three, or more combinations for customers to choose.

Weihao three-phase photovoltaic transformer parameters for reference!

Conditions of use: Working environment temperature: -15~+50°C;

Working environment humidity: 20~90%RH;

Working environment atmospheric pressure: 860 hPa～1060 hPa;

Storage/transportation temperature: -20°C～+55°C.

Main technical features:

Rated capacity: 5-300KVA

Input voltage: 380V/400V

Input current: according to actual capacity

Output voltage: 380V /400V

Output current: according to actual capacity

Connection method: Dyn11(△ /Y) Yny0 DZN0

Efficiency: ≥96%;

Frequency: 50Hz/60Hz

Insulation resistance: 25mA less than 500MΩ;

Induction withstand voltage: 125HZ/800V/ 60″

Insulation class: H class (temperature resistance 155 degrees)

Noise: ≤30dB);

Temperature rise: ≤ allowable temperature rise 115K;

Impedance drop: ≤4.5%;

Junction Structure: forced air cooling; be a temperature controller, automatically turn on the fan reaches a certain temperature according to customer requirements.

Protection class: IP54

Anti-interference method: copper foil layer isolation, shielding grounding;

Waveform distortion: no additional waveform distortion;

Electric strength: no breakdown and flashover phenomenon for one minute with a power frequency sinusoidal voltage of 5000V;

Insulation resistance: (input and output to ground): the test voltage is at least 1000VDC, and the insulation resistance is greater than 200MΩ;

Overload capacity: twice the rated current for one minute.