Product introduction
It is safe, non-pollute,and flame proof, which can be installed directly on the load center with the merits of free maintenance, easy installation, low combined operationcost, low loss and excellent humidity resistance. The transformer can be operated normally under 100% humidity and put into motion without dry in advance when out of use It shares the properties of low partial electricity local discharge, low noise and large heat dispel capability, it can be operated with the rated load of 120% under the forced air cooling conditions. With perfect temperature protectcontrol system to ensure safty operation of the transformer Referring to the operation research of10 thousand transformers have been putto use, their reliability norm have reached advanced international standard.
Product features
Low Loss, Low Operating Cost, Energy-saving Effect Is Obvious;
Flame, Fire, Explosion, Pollution-free;
Moisture Performance, Heat Dissipation Ability;
Board Lowered, Noise, Maintenance-free;
High Mechanical Strength, Resistance To Short-circuit Capability, Long Life
Range of application
This product should be and in high-rise buildings, commercial centers, hospitals, laboratories, schools, theaters, offshore drilling platforms, ships and oil chemical plant, railway stations, airports, subway, mine, water conservancy coal-fired power plants, substations, etc.
Core
Core material for cold rolled silicon-steel sheet is made of high quality orientation, 45 degrees of inclined seam structure, column with insulation tape binding, the surfaces of the core insulation resin paint seal in moisture from the rust, clamp parts and fasteners by surface treatment to prevent corrosion.
Low pressure foil coil
For low voltage, high current coil, the short circuit when the stress is larger, the short circuit of low pressure with less number of turns at the same time, low voltage electric current, the greater the ampere turns not smooth problem by using the line around the type of the more prominent, heat dissipation problems, also need to be considered as low pressure the foil type winding can better solve the above problems, first of all, foil products no axial axial spiral Angle, number of turns and balance of ampere turns, high and low voltage winding short circuit of transformer when axial stress is lesser, secondly because of its thin insulation, craft and easy to set up multiple air duct, the heat dissipation problem is better also.
Hv casted winding
Class F coil insulated copper wire as conductor, glass fiber and epoxy resin composite materials for insulation, its coefficient of expansion similar to the copper conductor, with good impact resistance, temperature changes, crack resistance. Glass fiber and epoxy resin constituent all have self-extinguishing, it does not continue to burn, it does not produce toxic gases and pollute the environment. Epoxy resin has good insulating properties, particularly suitable for the production of high-voltage coil level.
Temperature control
Transformer are installed with temperature overheating protection device, overheating protection device mainly through embedded within the low voltage winding of Pt thermistor transformer temperature detection and control. The device provides the following functions:
1, the operation process of transformer circuit three-phase winding temperature value;
2, a phase winding of the hottest temperature value;
3, acousto-optic alarm, fan start;
4, fan overload protection and computer interface.
Cooling way
The cooling system of dry type transformer is divided into natural air cooling (AN) and forced air (AF), natural air cooling (AN), can be continuous output rated capacity, to the forced air cooling (AF), transformer output can be super famous 40% of the rated load, suitable for all kinds of emergency load or intermittent load operation. Due to large load loss and impedance voltage amplitude, forced air cooling is not recommended (AF) long time continuous load operation.
When the transformer is installed in the basement or in the environment with poor ventilation capacity, the ventilation and ventilation equipment shall be added. The ventilation capacity shall be selected according to the air consumption per 1kW loss of 2-4m / min.
Protect shell and line bus
Dry type transformer generally no shell protection, namely IP00, according to user requirements can be mounted IP20, IP23 and other protection grade requirements of shell.
IP20 shell can prevent greater than 12 mm diameter solid foreign body into the shell, to provide security for the live part.
IP23 more and have prevent and heavy straight into droplets of water inflow within 60 degree Angle, can be comfortable and in outdoor running.
IP23 shell can reduce transformer cooling capacity, capacity of small fell about 5%, large capacity fell about 10%.
Shell material with steel, steel plastic, aluminum alloy and stainless steel. The shell made of steel plate, shell users can choose the color.
Low voltage line with standard bus exhaust line, lateral line and top line, can also be designed according to user needs special way.
Using the environment
Ambient temperature: - 5 ℃ ~ + 40 ℃
The most thermidor average temperature + 30 ℃
The hottest year average temperature 20 ℃ +
The altitude does not exceed 1000 m
The power supply voltage waveform similar to sine wave
Three-phase power supply voltage should be roughly symmetric
No obvious the filth of the installation environment
Indoor use
The way into the line diagram
Distribution transformer according to different forms of interface with conventional qualification, standard enclosed bus line and side line, also can also be designed according to user requirements special way.
Product parameter
Types of meaning
Product standards
GB/T10228-2015 GB1094.11-2007
High pressure rating: 10 (10.5, 11, 6, 6.3, 6.6) kV
Low pressure rating: 0.4 kV
Tapping range: no excitation voltage regulation (±5%,±2 x2.5%)
Link category: Dyn11 or Yyn0
Insulation level: LI75AC35 / AC5
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