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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 conveninent maintance,it can be applied to such power transmission and distribution places like underground railway, high building, airport, station, wharf,enterprise,tunel,etc.
It is mainly used in power supply occasions of AC50-60Hz and voltage, connection group and capacity of trapped winding can be designed and produced according to users' requirements.
Main Technical Data
| Input Voltage | Rated voltage±10% |
| Output voltage | Rated voltage 2-5% |
| Efficency | >95%(power grade 50KVA above ) |
| Frequency | 50-60Hz |
| Waveform distoration | Non additional waveform distortion |
| Funcation | Current, input voltage and output voltage indicators and input switch are available at request. |
| Long-term unattended operation is allowable. | |
| Insulation resistance | Normally more than 10MΩ |
| Electricity-resistance stength | single:Power frequency sinusoidal voltage 1500v for 1min. without breakdown or flashover |
| Three:Power frequency sinusoidal voltage 2000v for 1min. without breakdown or flashover | |
SG Dry type transformer