S11-M Series 10 kV Class Low-Loss Fully Sealed Power Transformer

Fully sealed power transformers eliminate the oil conservator and instead utilize the finned walls of the corrugated tank as heat‑dissipating cooling elements. As the transformer oil level rises or falls, the tank expands and contracts, isolating the interior from the atmosphere and thereby preventing oil degradation, insulation moisture ingress, and aging, thus enhancing operational reliability. The core is fabricated from high‑quality cold‑rolled silicon steel sheets, which effectively optimize the magnetic flux density distribution within the core, reduce noise, and lower losses. The windings are wound with high‑strength enameled wire (or paper‑wrapped wire) in a cylindrical (or disc‑type) configuration, featuring uniform ampere‑turn distribution and a well‑designed insulation system, providing excellent short‑circuit withstand capability. All fasteners inside the tank are equipped with locknuts to ensure they remain securely tightened during operation even after long‑distance transportation. Following phosphating, the tank surface is coated with a three‑proof paint—resistant to moisture, mold, and salt spray—making it ideally suited for demanding environments such as metallurgy, mining, and petrochemical industries.

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Oil-Immersed Power Transformer Series

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Product Description

　　Overview

　　Fully sealed power transformers eliminate the oil conservator and instead use the corrugated tank’s finned walls as heat‑dissipating cooling elements. These fins expand and contract with changes in the oil level, isolating the transformer interior from the atmosphere and thereby preventing oil degradation, insulation moisture ingress, and aging, thus enhancing operational reliability. The core is fabricated from high‑quality cold‑rolled silicon steel, which effectively improves the distribution of magnetic flux density within the core, reduces noise, and lowers losses. The windings are wound with high‑strength enameled wire (or paper‑wrapped wire), featuring a cylindrical or disc‑type construction, uniform ampere‑turn distribution, and a well‑designed insulation system, providing excellent short‑circuit withstand capability. All fasteners inside the tank are equipped with locknuts to ensure they remain securely tightened during operation even after long‑distance transportation. Following phosphating, the tank surface is coated with a three‑proof paint—resistant to moisture, mold, and salt spray—making it ideally suited for demanding environments such as metallurgy, mining, and petrochemical industries.

　　Ordering Instructions

　　When placing your order, please provide the following parameters:

　　1. Product Model

　　2. Rated Capacity

　　3. Voltage Combination

　　4. Scope of Adjustment

　　5. Frequency

　　6. Connection Group Designation

　　7. Short-circuit impedance

　　8. For products with special requirements, specify the technical specifications.

　　Technical Performance Parameters

Rated Capacity (kVA)	Rated voltage (kV)		Connection Group	No-load Electric current (%)	Loss (W)		Impedance Voltage (%)	Reference external dimensions (mm)			Reference weight (kg)			Track gauge Horizontal × Vertical (mm)
Rated Capacity (kVA)	High pressure	Low pressure	Connection Group	No-load Electric current (%)	No-load	Load	Impedance Voltage (%)	long	wide	High	Body of the vessel	Heavy oil	Total weight	Track gauge Horizontal × Vertical (mm)
30	6 ±2×2.5% or 6.3 ±2×2.5% or 10 ±2×2.5%	0.4	Yyn0 Dyn11	1.5	100	630/600	4.0	750	450	950	150	67	300	400×350
50				1.3	130	910/870		800	500	990	210	90	350	400×350
63				1.2	150	1090/1040		850	580	1000	240	100	400	400×400
80				1.2	180	1310/1250		1050	700	1000	280	110	510	400×400
100				1.0	200	1580/1500		1050	770	1020	350	120	550	400×400
125				1.0	240	1890/1800		1100	770	1050	390	140	630	550×550
160				1.0	280	2310/2200		1100	780	1080	470	150	700	550×550
200				1.0	340	2730/2600		1250	880	1100	580	160	880	550×550
250				0.9	400	3200/3050		1250	900	1150	650	170	930	550×550
315				0.9	480	3830/3650		1300	900	1150	720	180	1080	550×550
400				0.8	570	4520/4300		1300	900	1250	850	200	1200	550×550
500				0.8	680	5410/5150		1450	1030	1250	1150	240	1600	660×660
630				0.6	810	6200	4.5	1550	1100	1250	1250	260	1750	660×660
800				0.6	980	7500		1750	1250	1350	1450	350	2200	820×820
1000				0.6	1150	10300		1750	1300	1400	1700	400	2600	820×820
1250				0.5	1360	12000		1900	1350	1750	1850	580	3050	820×820
1600				0.5	1640	14500		1980	1400	1850	2500	810	3800	820×820
2000				0.4	1940	18300	5.0	2150	1450	1900	3000	850	4200	820×820(1070)
2500				0.4	2290	21200	5.0	2250	1450	1980	3800	930	5200	820×820(1070)
Note: For three-phase transformers with a rated capacity of 500 kVA or less, the load loss values above the diagonal line in the table apply to the Dyn11 connection group, while those below the diagonal line apply to the Yyn0 connection group.