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|Core:||Silicon Steel Sheet||Cooling:||AN Or Customized|
|Capacity:||315KVA Or Customized||Rated H. V.:||20Kv Or Customized|
|Rated L. V.:||0.433kv Or Customized||Impedance:||4% Or Customized|
20kV - 315kVA Cast Resin Dry Type Transformer , Three Phases , Two Winding , Power Distribution
With excellent performers, it can overcome those harsh operation conditions: high altitude, high humidity, high temperature and large temperature difference.
In daily life, it is exactly suitable for the places like government offices and bureau residential area and other areas that strictly demand of special require for fire proof.
Rising the challenge of large load fluctuation or long time overload places, it can be widely used in some places, for instance, urban rail, metallurgical industries, power plants, shopping mall and so on.
It has effect of cooling capacity and high performance such as moisture proof and light shock resistance.
It meets the needs of environmental adaptability and lighting shocks, strong resistance to thermal shock, anti-cracking and recycling.
It adopts NOMEX insulation systems in the main insulation, inflaming retarding, explosion proof and so on.
Vacuum pressure impregnation curing process, high mechanical strength, withstand short-circuit, safe and reliable.
Cast Resin Dry Type Transformer, Low Noise, Low Loss and Low Partial Discharge.
|I Basic Information|
|1||Rated Voltage ratio||kV||20kV / 0.433 kV|
|1.02||Applicable Standards||IEC 60076|
|1.04||Country of Origin||China|
|II Electric Performance|
|2.06||Insullation Class||Class H|
|2.07||Temperature Rise (@40℃ ambient temperature)||K||125K|
|2.14||Load Loss (@120℃)||W||3670|
|2.15||Local Partial discharge||pC||<10PC|
|2.16||Impulse Withstand Voltage (HV/LV)||kV||75/0|
|2.17||Power Frequency Withstand Voltage
|2.18||Rated Duration of Short Circuit||s||2|
|III Materials & Accessories|
|3.01||Core Materials||Silicon Steel Sheet|
|3.02||Winding Materials||Copper conductor/foil|
|3.03||Insulation methods||HV vacuum cast / LV impregnant|
|3.04||Main Insulation Materials||Epoxy Resin|
|3.06||Sensor for Temperature Alarm and Trip||pcs||Yes, contact provided|
Likewise, if no high over currents occur due to short-circuits in the power system, the
transformer may operate well in spite of degraded mechanical properties.
In Figure A.2 the four dots indicate the time in hours needed to reach the defined end-point at
the four different temperatures 170 ºC, 160 ºC, 150 ºC and 140 °C according to the thermal
endurance test. A regression line is drawn between the four points and extended to intersect
the 20 000 h ordinate. The intersection takes place at a temperature of 130 °C.
Consequently the material TI for this particular property is 130. Further the regression line
shows that the estimated temperature increase that would bring the material to the endpoint
after 10 000 h is about 5 ºC. The halving interval HIC is then 5.
Because different material properties may decline at different rates, it may be necessary to
assign several temperature indexes and halving intervals to one and the same material.
Detailed descriptions regarding the experimental procedures are given in IEC 60216-1 to
IEC 60216-6. Figure A.2 shows a simplified and idealised picture that just demonstrates the
principle. In reality there will be dispersion in the results from the material samples, partly due
to real variations in the material, partly due to measurement uncertainty.
Detailed instructions for calculating thermal endurance characteristics from large bodies of
experimental data are provided in IEC 60216-3, including statistical test to verify the validity
of using Arrhenius’ law. Materials containing substantial quantities of inorganic components
may deviate considerably from Arrhenius’ law.
GB/T10228 , GB1094.11 , IEC60076-11 , DIN42523
Contact Person: Sandy