Oil Immersed Transformers, Series S11 Manufacturer

Oil Immersed Transformers, Series S11

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Oil immersed transformers use iron roll cores and highly stable winding support, improving operational reliability. Fully sealed corrugated oil tanks are used to ensure the transformer oil will not come into contact with ambient air and will not absorb external moisture that will result in a loss of insulation strength. Compared to common oil immersed transformers, the fully sealed transformers remove the need from oil storage tanks and ensure transformers are isolated from the air, thus preventing and slowing down oil deterioration and aging, and improving the transformer operational reliability. They are suitable for power systems with a 50Hz AC current, related working voltage of 10kV or below, and operate as power distribution transformers in metallurgical, chemical, textile, and light industries.

Technical parameters

Model	Rated capacity	Rated capacity High voltage	Rated capacity Low voltage	No-load losses（W）	Load losses（W）	No-load current（%）	Short circuit impedance（%）	Weight（kg） Oil weight	Weight（kg） Product weight	Weight（kg） Overall weight	Dimensions（mm） L	Dimensions（mm） W	Dimensions（mm） H	Gauge （mm）
S11-M-30/10	30	11 10.5 10 6.3 6 Tapping link range ±5% or ±2 ×2.5%	0.4	95	600	1.3	4	90	200	400	1050	660	1140	400×400
S11-M-50/10	50			130	870	1.1		100	220	460	1070	710	1180
S11-M-63/10	63			150	1040	1		110	250	500	1110	720	1190
S11-M-80/10	80			170	1250	0.9		115	290	550	1120	730	1200
S11-M-100/10	100			200	1500	0.8		120	350	620	1140	740	1220
S11-M-125/10	125			230	1800	0.8		145	390	700	1180	760	1280
S11-M-160/10	160			270	2200	0.7		175	460	830	1210	780	1280	550×550
S11-M-200/10	200			330	2600	0.7		190	520	910	1240	780	1360
S11-M-250/10	250			390	3050	0.6		200	610	1000	1280	800	1380
S11-M-315/10	315			470	3650	0.6		220	730	1190	1330	860	1390
S11-M-400/10	400			560	4300	0.5		260	900	1430	1360	860	1440	660×660
S11-M-500/10	500			670	5100	0.5		280	1000	1600	1439	920	1480
S11-M-630/10	630			800	6200	0.5	4.5	330	1100	1830	1540	1010	1510
S11-M-800/10	800			980	7500	0.4		450	1280	2300	1610	1030	1660	820×820
S11-M-1000/10	1000			1150	10300	0.4		550	1450	2700	1750	1160	1750
S11-M-1250/10	1250			1360	12000	0.3		630	1800	3200	1800	1260	1810
S11-M-1600/10	1600			1640	14500	0.3		800	2100	3700	1930	1300	1890
S11-M-2000/10	2000			1940	18300	0.3	5	1050	2600	4500	2030	1340	2000	920×920
S11-M-2500/10	2500			2290	21200	0.3		1200	3100	5500	2410	1610	2400
S11-M-3150/10	3150			2730	24300	0.3		1400	4100	7200	2750	1810	2600

Features

The coils feature a low axial short circuit force structure. When short circuiting occurs, this structure will reduce the axial short circuit force, thus improving the bearing’s short circuit ability.
Transformer bodies feature a highly reliable supporting structure, ensuring the compaction of both upper and lower coil parts. The full body ensures transformers have an exceptional short circuit bearing capability.
Relatively low magnetic flux density is part of the design, needed to lower no-load losses and will ensure an unsaturated core flux and small third harmonic when the transformers run under voltage.
Transformer tank nuts and bolts are made of 304 stainless steel for a rust resistant performance.
The best sealing rings in the country are used, thus improving transformer service life.

Service conditions

The highest temperature: +40℃
The lowest temperature: -25℃
Altitude: ＜1000m
The highest monthly average relative humidity: 90% (20℃)
Installation site: Locations without risk of fire or explosion, serious pollution, chemical corrosion, vibration. They can be installed either indoors or outdoors.