QSG/SG 3 phase dry-type isolation transformer

QSG/SG three-phase dry type isolation transformer is a new generation energy-saving power transformer developed by our factory based on international similar products and combined with China’s national conditions, from 300VA to 1600KVA, in line with international and national standards such as IEC439 and GB5226. The winding adopts the method of winding out the hole row.… Continue reading QSG/SG 3 phase dry-type isolation transformer

Products description

QSG/SG three-phase dry type isolation transformer is a new generation energy-saving power transformer developed by our factory based on international similar products and combined with China’s national conditions, from 300VA to 1600KVA, in line with international and national standards such as IEC439 and GB5226. The winding adopts the method of winding out the hole row. The transformer is vacuum-impregnated, so that the insulation grade of the transformer reaches F class or H class, and the product performance reaches the advanced level at home and abroad. QSG/SG series three phase dry type isolation transformer is widely used in circuits with AC 50Hz to 60Hz and voltage below 2000V. all can be specially customized as per different requirements of the end users.

Type designation

MODEL: □SG□
  
None: lsolation, Q: Autocoupling
SS: three-phase
GDry-type transformer
Power KVA

Normal use condition

● Normal use condition
● The altitude does not exceed 2500M;
● Ambient medium temperature: no lower than -25 ℃, no higher than + 40 ℃;
● The current and voltage waveform is similar to a sine wave;
● Places not subject to rain and snow erosion, and places without significant shaking and shock vibration;
● In the medium without explosion danger, and in the medium, there is no gas and conductive dust sufficient to corrode metals and destroy insulation
● Input and output voltage can be customized according to customer needs

Product analysis

① Input Voltage
② Output Voltage
③ Indicator light
④ Chassis switch trip lock
⑤ Heat sink

Main technical parameter

Dimensions with housing

 Product modelInput voltageOutput voltagesize(mm)L x W x H
QSG-5KVADefault 380V 660V 440V 380V 220V(Customisable voltage)Default 220V 1140V 690V 660V 440V 415V 400V 380V 220V  110V(Customisable voltage)390*300*330
QSG-8KVA450*300*390
QSG-10KVA450*300*390
QSG-15KVA505*350*420
QSG-20KVA505*350*420
QSG-25KVA350*500*520
QSG-30KVA540*380*420
QSG-40KVA570*420*460
QSG-50KVA400*550*570
QSG-60KVA450*600*620
QSG-70KVA450*600*620
QSG-80KVA450*600*620
SG-3KVADefault 380V 660V 440V 380V 220V(Customisable voltage)340*300*330
SG-5KVA420*330*360
SG-10KVA460*350*450
SG-15KVA490*390*450
SG-20KVA520*430*470
SG-25KVA580*460*450
SG-30KVA580*460*540
SG-50KVA750*480*690
SG-80KVA800*500*740
SG-100KVA900*550*840
 Product model  Input voltage Output voltageSize (mm) L x W x H
QSG-0.5KVADefault 380V 660V 440V 380V 220V(Customisable voltage)Default 220V 1140V 690V 660V 440V 415V 400V 380V 220V  110V(Customisable voltage)120*88*120
QSG-1KVA180*120*155
QSG-2KVA180*140*155
QSG-3KVA240*145*205
QSG-5KVA240*155*205

Product specifications

BrandZHENGXI
ModelQSG/SG
PhaseThree phase
Overload Capacity±1%
Voltage Change Rate≤1.5%
Distortion Of Output WaveformNo distortion(compared toinput waveform)
Insulation ClassClass F,high temperature resistance 150℃
Insulation Resistance≥150MQ
Work EfficiencyInductive (isolated)>99%
Dielectric Strength2000VA/1min
Overload Capacitylt is allowed to exceed 1.2 times ofrated load
Design Life30 years
Noise≤35dB (within one meter)
Cooling MethodDryair cooling
Temperare Rise≤60°C
Frequency50/60Hz
Working EnvironmentTemperature:-20~+45°C Humidity:≤95% RH does not condense
WorkplaceNon-corrosive gas and conductive dust
Safety StandardProducts comply with international national standards such as VDE0550. IEC439JB5555,GB226
Connection MethodAnycombination of Y/△
Stocking SituationThe 1~300KVA standard models are available in stock, and all specifications are producedin a standardized manner.

Wiring Diagram

The cold-rolled oriented silicon steel sheet is used which has the advantages of good heat dissipation system, low core loss, and good magnetization characteristics.

Pure copper coil is durableand does not generate heat

The use of pure copper coils has low line loss and is not easy to age

The casing is porous designed,and the cooling fan installed onthe back can effectively dissipateheat and reduce the temperatureof the transforme

Swivel casters
The transformer has four universal wheels, which areeasy to move, and can berotated 360° topromote labor-saving and quick

Security door lock
Safety door lock to prevent misoperation by others

Chassis shell
Rugged shell, effective dustproof, protects theinternal transformer

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