content_image/499875.jpg
## 8.5.3.1 Dry type transformers 

 Three-phase, two coil 

 Dry type that has epoxy resin covered coils 

 Indoor 

 Protection level IP31 

 Voltage adjusted at idle 

It will be 34.5 kV/0.4 kV voltage level in accordance with the facility energy input. (As per Local Energy Supplier’s Instructions.). 

Unless it is stated otherwise in this specification and appendices, transformers will be manufactured and tested according to Turkish Standards (TS) and International Electrotechnical Commission (IEC) standards latest versions given below: 

<img src='content_image/499875.jpg'>

## 8.5.3.2 Testing and commissioning 

Power transformers shall be routine tested at the manufacturer's works in accordance with BS EN 60076 The Engineer will require witnessing the following tests: 

 Measurement of winding resistance. 

 Ratio, polarity and phase relationship. 

 Impedance voltage. 

 Load losses. 

 No-load losses and no-load current. 

 Insulation resistance. 

 Induced over-voltage withstand. 

 Separate source voltage withstand. 

Further witness tests shall also be carried out in accordance with the following: 

 Impulse voltage withstand. If the manufacturer can provide evidence covering impulse voltage withstand tests for transformers of similar type and design, Type Test certificates will be acceptable. 

