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. A variety of transformers under 110kV are included in the product line: the stacked iron core structure series, the rolled iron core structure series, amorphous alloy series, etc. Smart and diverse structures and nice appearance make this product to meet the needs of different users.

Model Explaination

‍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.

Normal service condition

Ambient air temperature

Maximum temperature: +40℃

Minimum temperature: -45℃

Average temperature of the warmest month: +30℃

The hottest annual average temperature: +20℃

Altitude: ≤ 1000m

Contamination class: III;

Seismic intensity: VIII

Power supply voltage waveform: approximately sinusoidal;

Note: If the above conditions are exceeded, please specify when ordering, for special consideration.

S11 20kV 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)
S11-30/20	30	High Voltage H.V.  20 ±2×2.5%  ±5%  Low VoltageL.V.  0.4	Dyn11 Yyn0‍	4‍	0.9	1200*950*1400	100	690/660
S11-50/20	50				1	1200*950*1500	130	1010/960
S11-63/20	63				1.1	1200*950*1500	150	1200/1150
S11-80/20	80				1.2	1200*950*1600	180	1440/1370
S11-100/20	100				1.4	1300*1000*1750	200	1730/1650
S11-125/20	125				1.6	1400*1100*1800	240	2080/1980
S11-160/20	160				1.7	1450*1200*1850	290	2540/2420
S11-200/20	200				1.8	1500*1300*1900	340	3000/2860
S11-250/20	250				2	1600*1500*2000	400	3520/3350
S11-315/20	315				2.2	1800*1600*2100	480	4210/4010
S11-400/20	400				2.4	1900*1700*2200	570	4970/4730
S11-500/20	500				2.7	2000*1800*2300	680	5940/5660
S11-630/20	630			4.5‍	3	2150*2000*2350	810	6820
S11-800/20	800				3.4	2250*2050*2400	980	8250
S11-1000/20	1000				4	2400*2200*2450	1150	11330
S11-1250/20	1250				4.5	2500*2300*2500	1380	13200
S11-1600/20	1600				5	2600*2400*2600	1660	15950
S11-2000/20	2000				5.6	2700*2450*2700	1950	19140
S11-2500/20	2500				7.1	2850*2650*2800	2340	22220

S13 20kV 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)
S13-30/20	30	High Voltage H.V.  20 ±2×2.5%  ±5%  Low Voltage L.V.  0.4	Dyn11 Yyn0	4‍	0.9	1200*950*1400	80	690/660
S13-50/20	50				1	1200*950*1500	100	1010/960
S13-63/20	63				1.1	1200*950*1500	110	1200/1150
S13-80/20	80				1.2	1200*950*1600	130	1440/1370
S13-100/20	100				1.4	1300*1000*1750	150	1730/1650
S13-125/20	125				1.6	1400*1100*1800	170	2080/1980
S13-160/20	160				1.7	1450*1200*1850	200	2540/2420
S13-200/20	200				1.8	1500*1300*1900	240	3000/2860
S13-250/20	250				2	1600*1500*2000	290	3520/3350
S13-315/20	315				2.2	1800*1600*2100	340	4210/4010
S13-400/20	400				2.4	1900*1700*2200	410	4970/4730
S13-500/20	500				2.7	2000*1800*2300	480	5940/5660
S13-630/20	630			4.5‍‍	3	2150*2000*2350	570	6820
S13-800/20	800				3.4	2250*2050*2400	700	8250
S13-1000/20	1000				4	2400*2200*2450	830	11330
S13-1250/20	1250				4.5	2500*2300*2500	970	13200
S13-1600/20	1600				5	2600*2400*2600	1170	15950
S13-2000/20	2000				5.6	2700*2450*2700	1390	19140
S13-2500/20	2500				7.1	2850*2650*2800	1650	22220

SH15 20kV Three Phase Oil Immersed Natural Air Cooling Double Winding Off Circuit Tap Changing Distribution Transformer With Amorphous Alloy Core

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)
SH15-30/20	30	High Voltage H.V. 20 ±2×2.5% ±5% Low Voltage L.V. 0.4	Dyn11 Yyn0	5.5	0.7	1100*1100*650	40	690/660
SH15-50/20	50				0.8	1200*1100*650	55	1010/960
SH15-63/20	63				0.95	1300*1250*650	65	1200/1150
SH15-80/20	80				1	1400*1300*700	75	1440/1370
SH15-100/20	100				1.25	1450*1300*850	90	1730/1650
SH15-125/20	125				1.3	1450*1300*950	100	2080/1980
SH15-160/20	160				1.4	1450*1300*1000	120	2540/2420
SH15-200/20	200				1.5	1500*1300*1100	145	3000/2860
SH15-250/20	250				1.7	1600*1350*1150	165	3520/3350
SH15-315/20	315				1.9	1700*1350*1200	200	4210/4010
SH15-400/20	400				2.2	1800*1400*1200	240	4970/4730
SH15-500/20	500				2.5	1900*1500*1200	290	5940/5660
SH15-630/20	630			6	3	2000*1600*1300	370	6820
SH15-800/20	800				3.5	2100*1700*1400	450	8250
SH15-1000/20	1000				4	2200*1800*1500	530	11330
SH15-1250/20	1250				5	2300*1900*1600	620	13200
SH15-1600/20	1600				6	2600*2000*1700	750	15950
SH15-2000/20	2000				7.5	2900*2200*1900	900	19140
SH15-2500/20	2500				9.5	3000*2500*2000	1080	22220