The oil immersed power transformer is used for regulating voltage and AC power transmission. The advantages include small dimension, reasonable price, strong weather resistance and so on. It is applicable to power systems, industrial and mining enterprises, transportation, post and telecommunications sector, research institutes, etc.Smart and diverse structures and nice appearance make this product to meet the needs of different users.

‍Models Explanation‍

Features：

Core

High-quality grain-oriented cold-rolled silicon steel sheet are employed, and the whole oblique non-porous banding structure are used here. The core has a multi-level ladder shape, with three joints or five joints, which is of low no-load loss and low noise. Rolled cores are direct rolled by certain special equipment, which gives the advantages including no seam, no corner weight, reluctance reduction, low no-load loss. Amorphous alloy is an advanced core material, which leads to an average reduction of 72% no-load loss and a reduction of 50% no-load current.

Coil

The high-quality QQ acetal enameled round copper wire and oxygen-free copper rod are used to form the coil. The coil type includes cylinder type, continuous type, new type spiral type, split type, etc. It has sufficient electrical strength, mechanical strength and cooling capacity.

In order to increase the capacity of anti-short-circuit of the transformer, self-adhesive transposition wire is used in the 35kV and above windings. The wire is made of self-adhesive acetal enameled flat wire, and after winding into a coil, it is heated so that the flat wire could be bonded between each other to form a rigid coil, which can withstand greater bending stress, thereby enhancing the capacity of anti-short-circuit of the transformer. The most important feature of the self-adhesive transposition wire is that it can reduce the loss of the transformer, and as a result of multi-stranded conductor with transposition, the eddy current loss and circulation loss are greatly reduced, it can also reduce the temperature rise of the partial hot spots of winding, thus the winding temperature distribution is more uniform.

Oil tank 

The oil tank is made of high quality steel plate, and the shape includes elliptical shape, rectangular shape, etc. The type of the radiator includes: corrugated sheet type radiator, expansion type radiator and corrugated type tank. The sealing performance test is conducted on oil tanks. The inside and outside surfaces are pickling and phosphate treated, and then spray priming paint for three times and surface paint for one time, which give its corrosion resistance.

1、S11 35kV Three Phase Oil Immersed Natural Air Cooling Double Winding Off Circuit Tap Changing Distribution Transformer

Model	Rated Capacity (kVA)	Voltage(kV)	Vector Group	Impedance Voltage (%)	Total Weight (t)	Reference Dimensions (mm)L*W*H	No-load Loss (W)	Load Loss           (W)
S11-50/35	50	High Voltage H.V. 35,38.5 ±2×2.5% ±5% Low Voltage L.V. 0.4	Dyn11 Yyn0	6.5	1.28	1400*1000*1800	0.16	1.2/1.14
S11-100/35	100				1.67	1450*1050*1900	0.23	2.01/1.91
S11-125/35	125				1.9	1500*1100*1900	0.27	2.37/2.26
S11-160/35	160				2.2	1550*1150*1950	0.28	2.82/2.68
S11-200/35	200				2.4	1600*1200*2000	0.34	3.32/3.16
S11-250/35	250				2.5	1700*1600*2100	0.4	3.95/3.76
S11-315/35	315				2.6	1900*1700*2200	0.48	4.75/4.53
S11-400/35	400				2.8	2000*1800*2300	0.58	5.74/5.47
S11-500/35	500				3	2100*1900*2400	0.68	6.91/6.58
S11-630/35	630				3.3	2310*2200*2500	0.83	7.86
S11-800/35	800				3.8	2500*2250*2550	0.98	9.4
S11-1000/35	1000				4.2	2550*2300*2600	1.15	11.5
S11-1250/35	1250				4.8	2680*2400*2700	1.4	13.9
S11-1600/35	1600				5.7	2700*2450*2750	1.69	16.6
S11-2000/35	2000				6.2	2800*2500*2900	1.99	19.7
S11-2500/35	2500				7.8	2850*2650*2950	2.36	23.2

2、S(F)11 35kV Three Phase Oil Immersed Natural (Forced) Air Cooling Double Winding Off Circuit Tap Changing Power Transformer

Model	Rated Capacity(kVA)	Voltage (kV)	Vector Group	Impedance Voltage(%)	Total Weight(t)	Reference Dimensions(mm) L*W*H	No-load Loss (W)	Load Loss (W)
S(F)11-6300/35	6300	High Voltage H.V. 35~38.5 ±2×2.5% Low VoltageL.V. 3.15,3.3,6.3, 6.6,10.5	YNd11	8	15	3600*3200*3100	5.24	35
S(F)11-8000/35	8000				18	3800*3300*3300	7.2	38.4
S(F)11-10000/35	10000				20	3900*3300*3500	8.7	45.3
S(F)11-12500/35	12500				24	4000*3400*3700	10	53.8
S(F)11-16000/35	16000				28	4200*3600*3800	12.1	65.8
S(F)11-20000/35	20000				33	4500*3800*4000	14.4	79.5
S(F)11-25000/35	25000			10	37	4700*4000*4100	17	94
S(F)11-31500/35	31500				44	5000*4200*4300	20.2	112

3、35 kV Three Phase Oil Immersed Natural (Forced) Air Cooling Double Winding On Load Tap Changing Power Transformer

Model	Rated Capacity(kVA)	Voltage (kV)	Vector Group	Impedance Voltage(%)	Total Weight(t)	Reference Dimensions(mm) L*W*H	No-load Loss (W)	Load Loss (W)
S(F)Z11-6300/35	6300	High Voltage H.V. 35~38.5 ±2×2.5% Low Voltage L.V. 3.15,3.3,6.3, 6.6,10.5	YNd11	8	18	4000*3300*3100	5.63	36.7
S(F)Z11-8000/35	8000				21	4200*3400*3300	7.87	40.6
S(F)Z11-10000/35	10000				23	4300*3500*3500	9.28	48
S(F)Z11-12500/35	12500				28	4800*3500*3700	10.71	56.8
S(F)Z11-16000/35	16000				33	5000*3800*3800	13.1	70.3
S(F)Z11-20000/35	20000				38	5300*4000*4000	15.5	82.7
S(F)Z11-25000/35	25000			10	43	5500*4200*4100	18.3	97.8
S(F)Z11-31500/35	31500				50	5800*4400*4300	21.8	116