110kV - 40000 KVA Low Noise Power Transformer Dyn11 ONAN / ONAF Cooling

Basic Information
Place of Origin: China
Brand Name: Pearl Electric
Certification: KEMA, CE, CCC, ISO9001
Model Number: PEO-S, S9~13,SZ11-M,SZ11
Minimum Order Quantity: 1 unit
Price: USD/RMB
Packaging Details: Seaworthy wooden packing
Delivery Time: 45-50days ex-work
Payment Terms: T/T, L/C
Supply Ability: 2.5 Million KVA/Year
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Capacity: 6300~63000kVA Or Customized Rated H. V.: 110kv Or Customized
Rated L. V.: 33kV/11kV Or Customized Vector Group: Dyn11 Or Customized
Impedence: 8-10% Or Customized Cooling: ONAN / ONAF Or Customized
High Light:

three phase power transformers


electrical power transformer


110kV - 40000kVA , Power Distribution Transformer , Three Phases , Power Transformer , Hight Capacity​


Product Advantages


The core is manufactured with high quality cold rolled grain-oriented silicon steel of high magnetic conductivity, and 45° mitring and steps overlapping structure is used for core production, enable the effectiveness of reducing no-load loss and no-load current.

HV winding:

HV winding is manufactured with high quality copper conductor, adopting optimized structure to improve electric distribution. Lightning impulse wave process is carried out for calculation and analysis, thus to improve transformer's anti-lightning impulse capability.


LV winding is manufactured with high quality foil conductor, so the ampere-turn balance is excellent and the transverse magnetic flux leakage is low. The anti-short circuit capability is thus greatly improved. Oil conduit is rationally designed in the windings to increase winding's heat dispersion surface, effectively reduce temperature and improve transformer's overload capability.




By winding number


110kV class 3-phase two-winding power transformer


By tap-changing


110kV class on-load tap-changing power transformer



110kV class off-load tap-changing power transformer



Insulation Structure:

The transformer adopts class-A insulation. The HV and LV windings are arranged in concentric way. Between the windings are oil-clapboard insulation structure built with paper cylinder and small oil conduit.


The tank conservator tank type with radiator fins. 

Executed Standards:



Accessories installation


a) Bushing

 According to “Bushing Installation & Instruction Manual”!

Unpack the bushing, do cleaning to remove the scraps from packaging.

Remove bushing panels and install the bushing following the instruction.


b) Install the test pipe for hydraulic seal. According to the needs of test, pre-install a 2-meter high hydraulic tube on teh cover, in order to make the final hydraulic seal test.

c) Protector connection.


Fill oil to the main body


After the installation of the transformer’s accessories, it needs oil filling. First open the lower valve of the radiator when fill the tanks, and the radiators are gradually filled with oil at the same time. When the radiators are full of oil, in order to exhaust the air at the tope completely, it needs to open the upper air plug to exhaust the air.


The action must be quick, lightly open the oil plug and closed it and spin tightly as soon as the oil begins to spill. Then open the upper valve of the radiator. When the oil is full, use the above-mentioned method to open deflate plug at the top of the bushing, ascending base, observing windows and other places one by one, deflate air and then close them.


110kV - 40000 KVA Low Noise Power Transformer Dyn11 ONAN / ONAF Cooling





Contact Details

Phone Number : 86-020-22626603

WhatsApp : +008618826241798