| Brand | ROCKWILL |
| Model NO. | Photovoltaic inverter grid-connected transformers |
| Rated frequency | 50/60Hz |
| Rated capacity | 100kVA |
| Series | SGG |
Product Overview：
An isolated transformer is a double-winding transformer that not only achieves voltage transformation in the power grid but also provides electrical safety isolation between input and output windings. This feature effectively prevents electric shock hazards when the human body comes into simultaneous contact with live components (or metal parts that may become charged due to insulation damage) and the ground. Additionally, it can isolate the third harmonics in the power grid, reduce heat generation during equipment operation, and extend the service life of insulating materials. It also functions to suppress and eliminate interferences such as noise, clutter, high voltage, and surges in the power grid, providing a pure power environment for equipment.
The dry-type photovoltaic transformers produced by our company are special transformers designed for photovoltaic grid-connected inverters. Adopting a foil winding process, the transformer core features a full-joint structure, and the core laminations are made of low-loss oriented silicon steel sheets, offering significant advantages of low loss, high efficiency, and low temperature rise. This series of transformers is suitable for circuits with an AC frequency of 50Hz/60Hz and a rated voltage below 690V, and can be custom-designed and manufactured according to specific user requirements.
Product features
Energy-saving and low-noise：High-quality cold-rolled silicon steel sheets are used for stacking; The special dipping process is used to effectively reduce the vibration and noise during operation; As well as the introduction of new processes and technologies such as the design of high-temperature resistant insulation materials, the transformer is more energy-saving and quieter. The coil has a ventilation groove to allow for smooth air flow, effectively reducing the coil temperature.
High reliability：The structure is reasonable, the efficiency is high, the waveform is not distorted, it is convenient and reliable to use, it can run for a long time, and the performance indicators fully meet the standard requirements of GB/6450 dry-type power transformer. It can isolate the power supply of the main power grid, anti-shock, anti-interference, and anti-lightning.
Eco-friendly features：It has heat resistance, moisture resistance, stability, chemical compatibility, low temperature resistance, radiation resistance and non-toxicity.
Versatility：From a single transformer to a multi-functional combined transformer with air cooling, protective housing, transformer and so on.
Model specifications：
Note：The dimensions and technical indicators of the above products can be customized according to customer requirements.
Application scenarios：
SGG/SD series photovoltaic inverter grid-connected transformer is a supporting product of solar photovoltaic, its rated input voltage is AC three-phase 270V, rated output voltage is AC three-phase 400V, rated working frequency is 50/60HZ, it will be the direct current in the solar energy through the photovoltaic inverter inverter out of the three-phase AC 270V voltage isolation and step-up into three-phase AC 400V voltage, in order to be integrated into the grid or directly supply the single-phase 220V and three-phase 380V AC power supply required by users.
