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DG and SG series single-phase and three-phase dry type transformerClass: TRANSFORMER
5
General
DG and SG series single - phase and three - phase dry type transformer adopts high quality material and advanced technology , it has advantages of damp - proof and convenient maintenance, it can be applied to such power transmission and distribution places like underground railway , high building, airport, station, wharf, enterprise, tunnel, etc. It is mainly used in power supply occasions of AC 50~60Hz and voltage less than 500V. All the input and output voltage , connection group and capacity of tapped winding can be designed and produced according to users’ requirements.
Working conditions (DG and SG series single-phase and three-phase dry type transformer)
1.Ambient temperature: -15℃~+40℃ 
2.Altitude: <1000m 
3.Relative humidity: <90% 
4.Environment exists without gas, steam, chemical deposition, dust or dirt that will affect transformer’s insulation seriously, also explosive or corrosive medium is not allowed. 
5.If any special working conditions that are not in line with the above stipulations, user shall negotiate with us.
Model and its meaning (DG and SG series single-phase and three-phase dry type transformer)
Main technical characters (DG and SG series single-phase and three-phase dry type transformer)
1.Input voltage: rated voltage ±10% 
2.Output voltage: rated voltage +5% (no load) 
3.Efficiency: ≥95% 
4.Waveform distortion: no additional waveform distortion 
5.Function: indication of input voltage, output voltage and current. 
6.Protection: over-current protection 
7.Can operate itself without anybody attending for a long term 
8.Insulation resistance: ≥50MΩ 
9.Electric strength: no breakdown or flashover phenomenon under power frequency sine voltage of 2000V for 1min 
10.Overload capability: for 1min under two times of rated current
Overall size (DG and SG series single-phase and three-phase dry type transformer)
Model 
(KVA)
Overall size 
L×W×H
(cm)
Installation 
size 
(cm)
Enclosure size 
L×W×H
(cm)
Transformer 
weight
(kg)
SG-0.5 17×9×15 11×7.8 32×15×22 10
SG-1 25×10×20 14×9 40×20×32 19
SG-1.5 25×11×20 14×10 40×20×32 24
SG-2 25×12×20 14× 11 40×20×32 27
SG-2.5 25 13 20 14 ×12 40×20×32 30
SG-3 30 13 25 20× 12 45×25×37 40
SG-4 30 14 25 20×13 45×25×37 45
SG-5 30 15 25 20×14 45×25×37 50
SG-6 30 16 25 20×15 45×25×37 54
SG-7 35 15.5 30 20×13.5 50×25×42 63
SG-8 35 16 30 20×14 50×25×42 66
SG-10 42 21 42 13.5×31 70×35×77 90
SG-20 52 24 52 15.5×40 70×35×77 180
SG-30 55 28 65 16.5×40 80×40×87 220
SG-40 61 30 65 17×40 80×40×87 265
SG-50 61 30 65 17.5×40 100×50 ×104.5 295
SG-60 70 32 66 19×45 100×50 ×104.5 370
SG-70 70 32 66 19×45 100×50 ×104.5 400
SG-80 70×32 ×67 19.5×45 100×50 ×104.5 450
SG-100 75×35 ×68 21×45 100×50 ×104.5 490
SG-120 75×35 ×68 21.5×45 100×50 ×104.5 520
SG-150 85×37 ×68 23×45 120×65 ×114.5 650
SG-200 95×45 ×68 29×45 120×65 ×114.5 850
SG-250 94×45 ×83 29×45 120×70 ×124.5 1080
SG-300 105×45 ×95 29×45 120×70 ×124.5 1350
SG Auto -0.5 17× 7 ×15 11×6 32×15×22 6.5
SG Auto -1 17× 8 ×15 11×7 32×15×22 8.5
SG Auto -1.5 17×10 ×15 11×9 32×15×22 11.5
SG Auto -2 17×10.5 ×15 11×9.5 32×15×22 13
SG Auto -3 25×10 ×20 14×9 40×20×32 20
SG Auto -5 25×12 ×20 14×11 40×20×32 26
SG Auto -6 30×13 ×25 20×12 45×25×37 39
SG Auto -7 30×13.5 ×25 20×12.5 45×25×37 41
SG Auto -8 30×14 ×25 20×13 45×25×37 45
SG Auto -10 30×15 ×25 20×14 45×25×37 49
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