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Power transformer​​

 S9 series oil-immersed power transformer of class 35kV with dual-winding off-circuit-tap-changing


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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℃
Rated capacity Installation dimension（mm）
kVA L W H C1 C2
800 2140 1320 2120 820 820
1000 2400 1330 2170 820 820
1250 2470 1350 2190 820 820
1600 2550 1375 2250 820 820
2000 2700 1400 2300 1070 1070
2500 2520 2300 2365 1070 1070
3150 2600 2350 2410 1070 1070
4000 2680 2560 2490 1070 1070
5000 2730 2750 2550 1070 1070
6300 2960 2800 3080 1475 1475
8000 3170 2610 3210 1475 1475
10000 3250 3220 3400 1475 1475
12500 3370 3260 3540 1475 1475
16000 3470 3280 3580 1475 1475
20000 3950 3450 3850 1475 1475
25000 4570 3800 3900 1475 1475
31500 5000 4150 4000 1475 1475

S9-800 ~ 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 		±5%
±2×2.5% 		3.15
6.3
10.5 		Yd11 1.23 9.90 1.0 6.5 790 3040
1000 1.44 12.15 1.0 850 3410
1250 1.76 14.67 0.9 950 3890
1600 2.12 17.55 0.8 1060 4620
2000 2.72 19.35 0.7 1195 5345
2500 3.20 20.70 0.6 1285 5960
3150 3.80 24.30 0.56 7 1470 6695
4000 4.52 28.80 0.56 1760 8350
5000 5.40 33.03 0.48 1850 9400
6300 6.56 36.90 0.48 7.5 2200 11300
8000 YNd11 9.00 40.50 0.42 2450 13240
10000 10.88 47.70 0.42 3230 16600
12500 12.60 56.70 0.40 8 3585 19400
16000 15.20 69.30 0.40 4420 23100
20000 18.00 83.70 0.40 6060 29700
25000 21.28 99.00 0.32 6490 38200
31500 25.28 118.80 0.32 6890 40300

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.

 适用于交流50Hz、额定工作电压35kV的电力系统中，作为35kV型变电站变电设备。

型号含义


铁心
铁心选用高导磁晶粒取向冷轧硅铜片。铁心为心式铁心，全斜接缝迭积式铁心，其铁心柱为多级阶梯的圆截面，铁轭与铁心为等截面。

绕组
绕组采用瓦楞油道，不浸漆工艺，紧缩带绑扎；绕组均为同心式线圈；高压绕组具有对应分接电压要求的抽头，引至分接开关上，开关安装在箱盖上，且需切断电源后方可变换分接电压。

安全保护装置
● 所有容量段的变压器均装有压力释放阀；
● 根据用户需求可安装具有报警和跳闸端子的气体继电器。

油温测量装置
● 变压器均装有玻璃温度计的管座，管座设在油箱顶部，伸入油内120±10mm；
● 1000～2000kVA变压器装有户外式信号温度计。

变压器油箱
● 变压器油箱由波纹壁构成，表面采用粉尘喷涂、漆膜牢固。波纹散热片不但具有冷却功能，而且具有“呼吸”功能，波纹散热片的弹性可补偿因温度升降而引起的变压器油体积的变化。因此全密封变压器没有储油柜，降低了变压器整体高度；
● 变压器在封装时采用真空注油工艺，完全去除了变压器中的潮气，变压器油不与空气接触。有效地防止氧气和水分侵入变压器而导致变压器绝缘性能下降和变压器油老化的问题，提高了变压器运行的可靠性。
● 安装高度：海拔不超过1000m
● 环境温度：-40℃～40℃ 
额定容量 安装尺寸（mm）
kVA L W H C1 C2
800 2140 1320 2120 820 820
1000 2400 1330 2170 820 820
1250 2470 1350 2190 820 820
1600 2550 1375 2250 820 820
2000 2700 1400 2300 1070 1070
2500 2520 2300 2365 1070 1070
3150 2600 2350 2410 1070 1070
4000 2680 2560 2490 1070 1070
5000 2730 2750 2550 1070 1070
6300 2960 2800 3080 1475 1475
8000 3170 2610 3210 1475 1475
10000 3250 3220 3400 1475 1475
12500 3370 3260 3540 1475 1475
16000 3470 3280 3580 1475 1475
20000 3950 3450 3850 1475 1475
25000 4570 3800 3900 1475 1475
31500 5000 4150 4000 1475 1475

S9-800~31500/35变压器
额定容量 电压组合 联结组 损耗（KW） 空载电流 短路阻抗 重量kg
kVA 高压kV 高压分接范围 低压kV 标号 空载 负载 % % 油重 总重
800 35
38.5 		±5%
±2×2.5% 		3.15
6.3
10.5 		Yd11 1.23 9.90 1.0 6.5 790 3040
1000 1.44 12.15 1.0 850 3410
1250 1.76 14.67 0.9 950 3890
1600 2.12 17.55 0.8 1060 4620
2000 2.72 19.35 0.7 1195 5345
2500 3.20 20.70 0.6 1285 5960
3150 3.80 24.30 0.56 7 1470 6695
4000 4.52 28.80 0.56 1760 8350
5000 5.40 33.03 0.48 1850 9400
6300 6.56 36.90 0.48 7.5 2200 11300
8000 YNd11 9.00 40.50 0.42 2450 13240
10000 10.88 47.70 0.42 3230 16600
12500 12.60 56.70 0.40 8 3585 19400
16000 15.20 69.30 0.40 4420 23100
20000 18.00 83.70 0.40 6060 29700
25000 21.28 99.00 0.32 6490 38200
31500 25.28 118.80 0.32 6890 40300

订货须知
订货时应提供产品型号、额定容量、高低压额定电压及高压分接范围、相数、频率、联结组标号。