DG and SG series single - phase and three - phase dry type transformer adopts high

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.

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.

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