|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|
|Packaging Details:||Seaworthy wooden packing|
|Delivery Time:||45-50days ex-work|
|Payment Terms:||T/T, L/C|
|Supply Ability:||2.5 Million KVA/Year|
|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|
three phase power transformers,
step up power transformer
35kV - 31500kVA , 3 phases , Double-column , Power Distribution Transformer , Non-exitation regulating transformer
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 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
35 kV class on-load tap-changing power transformer
35 kV class off-load tap-changing power transformer
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 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.