S13-M Series 10 kV Class Low-Loss Fully Sealed Power Transformer

The S13-M series fully sealed distribution transformers eliminate the oil conservator, instead using 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 preventing oil degradation, insulation moisture ingress, and aging, thereby enhancing operational reliability. The tank welds are full, smooth, even in thickness, and free of leaks. The core is constructed from 0.23 mm high‑permeability laser‑grooved laminations arranged in a stepped five‑step joint structure, which helps reduce no‑load losses and no‑load current, making this a new‑generation environmentally friendly product. Anti‑looseness nuts are used to secure and clamp the core. The high‑voltage windings are multi‑layered, with interlayer insulation provided by adhesive‑coated paper to enhance mechanical strength. The low‑voltage windings are either layered or of a novel helical design; interlayer insulation also employs adhesive‑coated paper, and the low‑voltage windings feature formed end rings that provide gapless, complete support, ensuring excellent mechanical strength. For pressure protection, a pressure relief valve is installed; for gas protection, QJ4‑type gas relays are used for units above 800 kVA. Units of 1,000 kVA and above are equipped with remote‑readout temperature gauges for monitoring oil temperature at a distance.

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Oil-Immersed Power Transformer Series

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Product Description

　　Overview:

　　The S13-M series fully sealed distribution transformers eliminate the oil conservator, instead using 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 preventing oil degradation, insulation moisture ingress, and aging, thereby enhancing operational reliability. The tank welds are full, smooth, even in thickness, and free of leaks. The core is constructed from 0.23 mm high‑permeability laser‑grooved laminations arranged in a stepped, five‑tier lap joint configuration, which effectively reduces no‑load losses and no‑load current, making this a new‑generation environmentally friendly product. Anti‑loosening nuts are used to secure and clamp the core. The high‑voltage windings are multi‑layered, with interlayer insulation provided by adhesive‑coated paper to enhance mechanical strength. The low‑voltage windings are either layered or of a novel helical design; interlayer insulation also employs adhesive‑coated paper, and the low‑voltage windings feature formed end rings that provide gapless, complete support, ensuring excellent mechanical integrity. For pressure protection, a pressure relief valve is installed; for gas‑related protection, QJ4‑type gas relays are specified for units above 800 kVA. Units of 1,000 kVA and larger are equipped with remote‑readout temperature gauges, enabling long‑distance monitoring of oil temperature.

　　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 Table

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 Width × Height (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 Width × Height (mm)
30	6 ±2×2.5% or 6.3 ±2×2.5% or 10 ±2×2.5%	0.4	Yyn0 Dyn11	1.5	80	630/600	4.0	850	500	900	200	80	350	400×400
50				1.3	100	910/870		920	550	980	275	110	450	400×400
63				1.2	110	1090/1040		950	700	1050	315	150	550	400×400
80				1.2	130	1310/1250		1000	750	1050	360	180	600	400×400
100				1.0	150	1580/1500		1000	750	1080	400	180	650	400×400
125				1.0	170	1890/1800		1050	750	1180	500	190	750	550×550
160				1.0	200	2310/2200		1200	800	1200	550	200	880	550×550
200				1.0	240	2730/2600		1250	850	1200	600	210	1000	660×660
250				0.9	290	3200/3050		1250	850	1250	680	250	1100	660×660
315				0.9	340	3830/3650		1300	900	1300	880	300	1300	660×660
400				0.8	410	4520/4300		1350	900	1350	1050	320	1500	660×660
500				0.8	480	5410/5150		1400	1000	1350	1200	350	1800	820×820
630				0.6	570	6200	4.5	1550	1050	1400	1450	380	2200	820×820
800				0.6	700	7500		1750	1150	1500	1700	450	2500	820×820
1000				0.6	830	10300		1800	1250	1600	1800	500	2700	820×820
1250				0.5	970	12000		1850	1350	1700	2100	550	3200	820×820
1600				0.5	1170	14500		1950	1400	1800	2600	650	3800	820×820
2000				0.4	1360	18300	5.0	2150	1400	2050	3000	700	4400	820×820(1070)
2500				0.4	1600	21200	5.0	2250	1400	2250	4100	800	5700	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 the values below the diagonal line apply to other connection groups. Applicable to the Yyn0 connection group