As a clean energy production method, photovoltaic power generation has been developed rapidly at home and abroad. The ZGS-ZT series combined transformers are precisely to meet the increasing power supply requirements of photovoltaic power generation. Our company produces 10KV and 35KV combined transformers. On the basis of the transformer, a series of products developed by ourselves by digesting and absorbing domestic and foreign advanced technology combined with domestic demand. The product is to install the transformer, load switch, and high-voltage fuse in the box of the transformer, and use the insulating liquid of the transformer as the insulation of the entire product. And the heat dissipation medium, using a fully sealed structure, the shell is divided, shot blasting, pickling, phosphating, respectively spraying primer, intermediate paint, and top coat to achieve the surface anti-corrosion, weather resistance, and UV resistance are all over ordinary spraying It has the advantages of small size, light weight and convenient installation.
Model and its meaning
Normal use environmental conditions
The altitude does not exceed 3000m;
The ambient temperature range is: -40℃-+45℃;
Outdoor wind speed should not exceed 300m/s;
Relative humidity: The average value is not more than 95%. , The monthly average is not more than 90%. ；
The waveform of the power supply voltage is approximately sine wave, and the three-phase power supply voltage is approximately symmetrical;
Installation location: Install in a place free from fire, explosion, serious pollution, chemical corrosion and severe vibration.
*The user can negotiate with the factory to solve the above normal use environmental conditions.
Product structure characteristics
The transformer body is closely matched with the oil tank and has a fixing device. All the high and low leads adopt soft connections. The tap leads and the no-load tap changer are cold-welded and fastened with bolts. All connections (including coils and backup fuses, plug-in fuses, load switches, etc.) are used Cold pressure welding, the fastening part is equipped with self-locking and anti-loosening measures. The transformer can withstand the vibration and bumps of long-distance power transmission. After sending it to the user's installation site, there is no need to carry out the conventional lifting core inspection.
The transformer is a sealed structure as a whole, and there is no oil conservator.
The vacuum oil injection process is used when the transformer is packaged to remove the moisture in the transformer. The transformer oil does not contact the atmosphere during operation, which effectively prevents oxygen and moisture from entering the transformer and causing the transformer insulation performance to drop and the transformer oil to age.
The box body is treated with a special process, has good anti-corrosion ability, and can effectively prevent the erosion of sand and coastal salt spray.
Fuse protection
10KV grade combination change
The high-voltage backup current-limiting protection fuse is used in series with the plug-in overload protection fuse to provide full range protection for the transformer. The high-voltage current-limiting protection fuse is used as short-circuit protection of the transformer, and the plug-in overload protection fuse is used as the protection of the overload and small fault short-circuit current of American power transformers and other power equipment.
35KV class combination change
A new type of high-voltage current-limiting fuse for full-range protection is used, which can reliably break any fault current between the current that causes the melt to melt and the rated breaking current. It uses a current-limiting fuse with higher The breaking capacity, not the current-limiting fuse, has better low-current protection characteristics. Combining the different characteristics of the two fuses, the combination is integrated to obtain good characteristics of full range breaking.
