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    Honle Group Co. ,Ltd., located in Yueqing Economic Development Zone, Wenzhou city, Zhejiang Province, is a national high-tech enterprise dedicated to the r&d, manufacturing and marketing of industrial electrical appliances.

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    Honle Group Co. ,Ltd., located in Yueqing Economic Development Zone, Wenzhou city, Zhejiang Province, is a national high-tech enterprise dedicated to the r&d, manufacturing and marketing of industrial electrical appliances.

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    Honle Group Co. ,Ltd., located in Yueqing Economic Development Zone, Wenzhou city, Zhejiang Province, is a national high-tech enterprise dedicated to the r&d, manufacturing and marketing of industrial electrical appliances.

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    Honle Group Co. ,Ltd., located in Yueqing Economic Development Zone, Wenzhou city, Zhejiang Province, is a national high-tech enterprise dedicated to the r&d, manufacturing and marketing of industrial electrical appliances.

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    Honle Group Co. ,Ltd., located in Yueqing Economic Development Zone, Wenzhou city, Zhejiang Province, is a national high-tech enterprise dedicated to the r&d, manufacturing and marketing of industrial electrical appliances.

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    Honle Group Co. ,Ltd., located in Yueqing Economic Development Zone, Wenzhou city, Zhejiang Province, is a national high-tech enterprise dedicated to the r&d, manufacturing and marketing of industrial electrical appliances.

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    Honle Group Co. ,Ltd., located in Yueqing Economic Development Zone, Wenzhou city, Zhejiang Province, is a national high-tech enterprise dedicated to the r&d, manufacturing and marketing of industrial electrical appliances.

BackHome > Products > Power transformer
Power transformerSZ9 series oil-immersed power transformer of class 35kV with dual-winding on-load tap-changing
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  • Technical

It is applicable for power systems of AC50Hz and rated working voltage 35kV, used as transformation equipment for substations of 35kV.

Iron

The iron core is made of cold-rolled grain-oriented silicon steel sheets with high magnetic conductivity, with inclined joint laminated structure. Section of the core limbs is of multi-class ladder round, with uniform section with that of yoke. 

Winding 
The winding adopts corrugated oil duct with non-dipping process, bound by shrinkable tape; all windings are of concentric coils; taps of HV winding with corresponding tapping voltage shall be led to the tap switch, and the switch shall be installed on the box cover. Power supply must be cut off first when changing the tapping voltage.

Installation of protection device 
●Transformers of all capacity specifications have been equipped with pressure relief valve; 
●Gas relay with alarm and tripping terminals is available on request. 

Oil-temperature measurement device 
●All the transformers are equipped with tube holder for glass-stem thermometer that is set on the top of oil tank, and immersed in oil for about 120±10mm;
●1000~2000kVA transformer is equipped with outdoor signal thermometer;

Transformer oil tank 
●Transformer oil tank is composed of corrugated walls with powder painted surface and reinforced with film. Corrugated cooling fin not only has cooling function, but also has “breathing” function, the elasticity of corrugated cooling fin make it adapt to the change of oil volume due to change of temperature. So this hermetically sealed transformer does not have oil conservator, which decreases the height of transformer. 
●The transformer adopts vacuum oil-injection technology during encapsulation that thoroughly removes the moisture from transformer, and keeps the transformer oil from contacting the air. This technology also avoid insulation performance reduction or oil aging due to entering of oxygen or moisture, it improves operation reliability of transformer. 
●Installation height: altitude shall not exceed 1000m
●Ambient temperature: -40℃~40℃
額定容量 安裝尺寸（mm）
kVA L W H C1 C2
800 2740 970 2120 820 820
1000 3000 990 2170 820 820
1250 3070 1020 2190 820 820
1600 3150 1060 2250 820 820
2000 2700 1100 2300 1070 1070
2500 3120 2300 2365 1070 1070
3150 3220 2350 2410 1070 1070
4000 3300 2560 2490 1070 1070
5000 3350 2750 2550 1070 1070
6300 3580 2800 3080 1475 1475
8000 3790 2610 3210 1475 1475
10000 3870 3220 3400 1475 1475
12500 3990 3260 3540 1475 1475
16000 4370 3480 3680 1475 1475
20000 4850 3050 3970 1475 1475
25000 5470 4000 4010 1475 1475
31500 5900 4450 4100 1475 1475

SZ9-800 ~ 31500/35 transformers

Rated capacity Voltage combination Connection group  Loss (KW) No-load current  Short-circuit impedance  Weight (kg)
kVA HV kV High-voltage tapping range LV kV symbol No-load On-load % % Oil weight Gross weight 
800 35
38.5 		±3×2.5%
±4×2.5% 		3.15
6.3
10.5
10.0
11.0 		Yd11 1.35 10.40 1.3 6.5 1010 3360
1000 1.60 12.80 1.2 1080 3800
1250 1.90 15.50 1.1 1170 4250
1600 2.30 18.50 1.1 1400 5010
2000 2.88 20.25 0.8 1590 5820
2500 3.40 21.73 0.8 1700 6350
3150 4.04 36.01 0.75 7 1950 7950
4000 4.84 30.69 0.75 2165 9065
5000 5.80 36.00 0.68 2250 9810
6300 7.04 38.70 0.68 7.5 2610 12010
8000 YNd11 9.84 42.75 0.6 2890 14790
10000 11.60 50.58 0.6 3830 18750
12500 13.68 59.85 0.56 8 4270 23530
16000 16.46 74.02 0.54 6200 25600
20000 19.46 87.14 0.54 7500 32670
25000 23.70 107.00 0.5 7800 42020
31500 27.50 126.00 0.4 8960 44330

Order guide
Please specify the product model, rated capacity, HV/LV rated voltage and high-voltage tapping range, phase number, frequency, connection group symbol and so on in the order.
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