Scope of application
800-31500/35 type oil immersed transformers are suitable for power systems with AC 50Hz and rated working voltage of 35KV,and are used as transformation equipment in smalland medium-sized substations

Model meaning

Working conditions
Installation height:altitude not exceeding 1000m;
Environmental temperature:-40℃~+40℃

Structural features
*Iron core
The iron core is suitable for cold rlled silicon steel sheet with high permeability magnetic crystal drawing orientation.The iron core is a core type iron core,the all-inclined joint type iron core,the iron core column is a multi-step round cutting surface,and the yoke and the iron core are equal cutting surface.
*Winding
The windings are concentric coils,and the high voltage windings have taps required for the tapping voltage,which are led to the tap changer.The switch is installed on the box cover,and the tap voltage can be changed after the power supply is cut off.
*Safety protection device
The transformer is equipped with gas relay;
The transformer is equipped with a pressure relief valve;
*Oil protection device
The transformer is equipped with an oil storage tank,one end of which is equipped with an oil level gauge;
A moisture absorber with oil seal should be installed on the transformer olstorage cabinet;
*Oil temperature measuring device
The transformer is equipped with a glass thermometer tube base,which is located on the top of the fuel tank.Reach 120±10mm into the oil; 1000kVA and above transformers are equipped with outdoor signal thermometers;
*Transformer tank and accessories
The transformer is generally not supplied to the car,and the welding position of the bottom bracket should meet the requirements of GB6451-1999.The lower wall of the fuel tank is equipped with an oilsample valve,and the lower part of the transformer oil tank is equipped with an oil discharge valve large enough.


Main technical parameters
35KV class 50kV·A~2500kV·A Three-phase double-winding non-excitation voltage regulation distribution transformer

Note 1:For transformers with A rated capacity of 500KV-A and below,the negative loss value above the feed line in the table applies to the Dyn11 connection group and the negative loss value below the slash line applies to the Yyn0 connection group.
Note 2:When the transformer annual average load rate is between 30%and 36%,the loss value in the table can be used to obtain the highest operating efficiency.

Oil-immersed 35KV class 630KV·A~31500kV·A three-phase double-winding power transformer without excitation voltage regulation

Note 1:For transformers with a low voltage of 10.5KV,products with connection group designation Dyn11 are available.
Note 2:For transformers with a rated capacity of 3150KV-A and above,the-5%tap position is the maximum current tap position.
Note 3:When the transformer annual average load rate is between 35%and 45%,the loss value in the table can be used to obtain the highest operating efficiency.

35KV class 2000KV·A~31500kV·A three-phase double-winding power transformer without excitation voltage regulation

Note 1:For a transformer with a low voltage of 10.5kv,the unconnected group label Dyn11 is available.
Note 2:The maximum current tap is -7.5%tap position.
Note 3:When the transformer annual average load rate is between 35%and 45%,the loss value in the table can be used to obtain thee highest operating efficiency