35kV - 20000 KVA Power Distribution Transformer Double Column Power​ Transformer Safety

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


electrical power transformer


35kV - 20000kVA , 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:


Gas relay


Contact action case Reason Solution
Alarm No color change of gas Lower oil-level Infuse transformer oil
Transformer or gas device has not been deflated completely


Air will vanishes when temperature rises.

Gas will generate when temperature or pressure falls heavy.


Gas will decrease or vanishes when temperature rises.

The secondary circuitry failure Check the secondary circuitry and resolve.
Color of the gas changes Transformer failure The following solutions are recommended:
--Measure the insulation resistance
--Measure the winding resistance
--Do no-load measurement
--Do chromatogram analysis of oil
To contact with the transformer manufacturer.

Lower oil-level

Can not see the oil-level through the view window

Find out the leaking place and repair
  Great transformer failure:
--Insulator crack
--Arc discharge
--Short circuit.

Do not electrify before complete checking!

To contact with the transformer manufacturer.

Notice: Using gas measure device to do an aerometry to the gas in air relay, and the gas measure is used for sampling and chemolysis.

35kV - 20000 KVA Power Distribution Transformer Double Column Power​ Transformer Safety





Contact Details

Phone Number : 86-020-22626603

WhatsApp : +008618826241798