Environment-friendly Dry-type Transformer

◆Core of SGB10 type Environment-friendly Dry-type Transformer

The iron core is made of imported grain oriented high-quality high magnetic conductivity silicon steel sheets stacked together. The45 ° fully inclined joint structure adopts an elastic fixing device between the winding and the iron core, which enables the transformer to have low no-load loss and noise.The surface of the iron core is treated with special technology, which not only reduces the noise of the transformer but also prevents the iron core from rusting during operation.The iron core is moderately clamped by a pull screw, and the upper and lower clamping parts are connected by a pull plate and fixed to the base as a whole. The winding is fixed by elastic pads, and the buffering structure can reduce the vibration level and noise of the winding.

◆ High and low voltage coils

The high and low voltage coils are made of Nomex insulation material and are repeatedly impregnated with solvent-free impregnating paint using VPl vacuum pressurization equipment, and then baked and cured at high temperatures multiple times. The high-voltage coil adopts a continuous structure with high mechanical strength and good heat dissipation conditions, avoiding the disadvantages of high interlayer voltage, poor heat dissipation ability, easy thermal breakdown, and low mechanical strength of multi.layer cylindrical coils, thereby improving the reliability of product operation; The low-voltage coil adopts a foil or longitudinal airway high current spiral structure. The impregnated coil has excellent moisture resistance and can withstand impacts more effectively, it has no cracks or partial discharge, and is easy to dry, decompose, and recycle after its service life, protecting the environment.

◆ Shell

If needed, Kexun Electric can provide shells with protection levels of IP20 or IP23.The meaning of the enclosure protection level lP20 is that solid foreign objects with a diameter of 12mm are not allowed to enter.To ensure the circulation of cooling air, the bottom and top of the shell are made of mesh plates

◆  Overheat protection

To take protective measures against coil overheating, SGB10 type Environment-friendly Dry-type Transformer of 315KVA and above are equipped with a temperature display protection device. This device uses temperature sensing elements embedded in the low-voltage winding as the signal source for the digital display instrument. When the temperature inside the low-voltage winding changes, the temperature sensing digital display instrument displays a new temperature value and performs control and alarm functions based on this temperature value to protect the transformer.

◆ Overload capacity

The SGB10 type Environment-friendly Dry-type Transformer adopts a new structure, new materials, and new processes, with good heat dissipation conditions, long thermal life, and extremely strong overload capacity, It can work safely and reliably for a long time under 120%overload. in the old 23 environment, there is no need for fan cooling and it can still operate at full load for a long time.

◆Security

The SGB10 type Environment-friendly Dry-type Transformer is the highest safety performance dry-type transformer available today, All insulation materials are noncombustible, self extinguishing, non-toxic, and contain less than 10% of flammable substances compared to epoxy cast products.They burn for a long time at a high temperature of 800 'c without producing toxic smoke, thus overcoming the defect of toxic gases produced during the combustion of epoxy cast transformers. The SG (B) 10 new product demonstrates superior performance in applications with high safety requirements, humid and hot conditions, and poor ventilation, such as power, subway, ship, chemical.and metallurgical industries.

◆ Excellent moisture resistance

The Nomex " insulation system of The SGB10 type Environment-friendly Dry-type Transformer is capable of withstanding the invasion of moisture.Adopting advanced VPl equipment and vacuum impregnation technology.The high-quality impregnating paint recognized by U can operate continuously for a long time at temperatures of 180 'c and above Nomex®paper is completely impregnated with impregnating varnish.

◆Smaller volume and lighter weight

The  SGB10 type Environment-friendly Dry-type Transformer uses DuPont Nomex@ paper as the main insulation material and uses it as a hybrid insulation system at the hottest point of the transformer, reducing its size and weight compared to epoxy resin cast in transformers of the same capacity.

◆Environmental Protection

The  SGB10 type Environment-friendly Dry-type Transformer can be decomposed and recycled after its service life, overcoming the defect of epoxy resin cast dry-type transformers that cannot be decomposed and pollute the environment dye to the solidification and fusion of resin and glass fiber into a whole after its service life.

◆Lead wire

The high-voltage output terminal is fixed on the upper part of the winding, and the tap is located in the middle of the winding. in the event of a power outage, the tap is changed through a connecting piece to adjust the output voltage.The low-voltage outgoing terminal is a plate type conductive strip, which is reliably connected to the outgoing strip through bolts.

◆Relevant standards

GB1094.11-2007 "Dry type Transformers"

GB/T10228-1997 "Technical Parameters and

Requirements for Dry type Power Transformers"

GB/T17211-1998 "Load Guide for Dry type Power Transformers"

JB/T10088-2004 "Sound Level of 6-220kV Power Transformers"

GB4208-1993 "Degrees of Protection Provided by Enclosures (lP Code)"

◆ Appearance and installation dimensions of The SGB10 type Environment-friendly Dry-type Transformer

◆Technical parameters of 10KV  SGB10 type Environment-friendly Dry-type Transformer