Distribution Power Transformer 35kV - 31500kVA Reducing No - Load Current

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: 4000~31500kVA Or Customized Rated H. V.: 33kv Or Customized
Rated L. V.: 11kV Or Customized Vector Group: Dyn11 Or Customized
Impedence: 8-11% Or Customized Cooling: ONAN / ONAF Or Customized
High Light:

three phase power transformers


step up power transformer


35kV - 31500kVA , 3 phases , Double-column , Power Distribution Transformer , Non-exitation regulating transformer​


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


35 kV class 3-phase two-winding power transformer


By tap-changing


35 kV class on-load tap-changing power transformer



35 kV 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:


Insulation levels and creepage distances


All bushings shall be able to withstand 10 % more test voltages than those specified in Table 4. The specific creepage for all terminals shall be 31 mm/kV minimum. 


The protected creepage distance to be given in schedule A of an enquiry document, is the value of creepage distance in the rain shadow at an angle of precipitation of 90º to the bushing axis. This value shall not exceed 50 % of the total creepage.


* Bushing types that we might provide(As per IEC )


 Outdoor immersed bushings


Unless otherwise stated in schedule A of an enquiry document, all open bushings shall be outdoor immersed bushings.


 Completely immersed bushings


Connections from winding leads into cable boxes or oil filled disconnecting chambers shall be effected using completely immersed bushings.


Capacitance graded bushings


Only capacitance graded bushings shall be supplied for all applications with nominal voltages of 44 kV

and above in accordance with this specification.



 Non-fluid bushings


Non-fluid filled capacitance graded bushings will only be accepted with specific approval.


 Tertiary bushings — minimum voltage ratings, stems and spacing


For three winding auto transformers the low-voltage (tertiary) bushings shall, despite their actual operating voltage, have at least an insulation level corresponding to a nominal system voltage of

33 kV. These bushings shall be equipped with a terminal stem of 38 mm diameter and 125 mm length, have a minimum metal-to-metal phase spacing of 580 mm and a centre-to-centre spacing of not less than 700 mm.


Distribution Power Transformer 35kV - 31500kVA Reducing No - Load Current


Contact Details

Phone Number : 86-020-22626603

WhatsApp : +008618826241798