Product Introduction

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Robust, reliable and field-proven, our 10-35 kV oil-immersed distribution transformers cover 50 kVA – 3 150 kVA with mineral oil or optional natural ester fluid. The wound-core or mitered lap-core built from high-grade, low-loss CRGO steel reduces no-load losses by 15 % compared to IEC 60076 limits, saving over 8 MWh per year on a 1 MVA unit and cutting operating costs for utilities and industrial plants.

High-density kraft paper and diamond-pattern transposed conductors create a compact winding block that withstands 75 kA short-circuit for 3 seconds; vacuum oil-filling at 1 mPa removes moisture and air, guaranteeing partial-discharge levels < 5 pC at 1.5 Um. Hermetically sealed corrugated tank or conservator design accommodates oil expansion from – 40 °C to + 40 °C without nitrogen padding, while an optional on-load tap-changer (OLTC) keeps output voltage within ± 1 % for fluctuating renewable or motor loads.

Sound pressure is trimmed to ≤ 54 dB(A) at 1 m through step-lap joints, vibration-damping pads and optimized tank geometry, allowing rooftop or street-level installation without costly acoustic screens. Off-circuit taps ± 2 × 2.5 % are accessed through a lockable IP54 lift-cover; HV and LV bushings can be front, top or side-mounted to match existing switch-gear footprints and shorten on-site cabling.

Built-in RTDs or magnetically coupled oil-level/temperature gauges feed SCADA or IoT gateways for real-time hotspot tracking, enabling 10 % emergency overload and predictive maintenance. Units comply with IEC 60076, IEEE C57, GB/T 6451, are seismic-qualified to 0.3 g and altitude-rated to 3 000 m. Delivered fully assembled, tested and witnessed, ready for energization within 24 hours of arrival.

Parameters Table

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Rated Capacity (KVA)	Rated Voltage (KV)		Vector Group	I0 (%)	Loss (W)		Uk (%)	Size (mm)			Weight (Kg)
Rated Capacity (KVA)	HV	LV	Vector Group	I0 (%)	PO	PK	Uk (%)	L	W	H	Oil	Total
30	6.0 6.3 10.0 10.5	0.4	Yyn0 Dyn11	1.20	80	630	4.0	960	630	880	70	350
50				1.04	100	910		1000	660	970	80	450
63				0.96	110	1090		1030	670	1000	90	500
80				0.96	130	1310		1050	680	1050	95	530
100				0.88	150	1580		1070	700	1100	105	600
125				0.88	170	1890		1080	700	1120	110	660
160				0.80	200	2310		1100	710	1150	120	780
200				0.80	240	2730		1120	720	1250	160	950
250				0.72	290	3200		1140	740	1270	180	1100
315				0.72	340	3830		1180	760	1290	210	1300
400				0.64	410	4520		1300	820	1310	220	1490
500				0.64	480	5410		1430	920	1350	260	1760
630				0.48	570	6200	4.5	1580	960	1360	310	2050
800				0.48	700	7500		1640	1060	1390	340	2400
1000				0.48	830	10300		1920	1270	1410	430	2900
1250				0.40	970	12000		1940	1290	1460	490	3110
1600				0.40	1170	14500		2100	1400	1520	620	3600
2000				0.32	1360	18300	5.0	2150	1430	1670	740	4600
2500				0.32	1600	21200	5.0	2280	1530	1720	780	5600

Rated Capacity (KVA)	Rated Voltage (KV)			Vector Group	I0 (%)	Loss (W)			Uk (%)	Size (mm)					Weight (Kg)
Rated Capacity (KVA)	HV		LV	Vector Group	I0 (%)	PO	PK		Uk (%)	L		W		H	Oil	Total
30	20 22 24	0.4		Yyn0 Dyn11	1.70	80		660	5.5	1060	730		1080		85	500
50					1.60	100		960		1100	760		1170		95	550
63					1.50	120		1140		1130	770		1200		110	710
80					1.40	140		1370		1150	780		1250		120	790
100					1.30	160		1640		1170	800		1300		140	820
125					1.20	190		1980		1280	800		1320		150	950
160					1.10	230		2410		1300	810		1450		160	1150
200					1.0	270		2850		1320	820		1650		170	1270
250					0..96	320		3340		1340	940		1670		190	1370
315					0.88	380		4000		1380	960		1690		220	1580
400					0.80	460		4720		1500	1020		1710		240	1810
500					0.80	540		5640		1630	1120		1750		320	2360
630					0.72	650		6480	6.0	1680	1160		1760		370	2850
800					0.64	780		7840		1740	1210		1790		400	2960
1000					0.56	920		10700		2020	1420		1810		450	3500
1250					0.56	1100		12500		2040	1440		1860		550	3970
1600					0.48	1330		15100		2300	1550		1920		640	4720
2000					0.48	1560		19100		2350	1690		1970		770	5520
2500					0.40	1870		22220		2480	1780		2020		960	6480
3150					0.40	2220		26400		2680	1880		12120		1000	7080

Rated Capacity (KVA)	Rated Voltage (KV)			Vector Group	I0 (%)	Loss (W)		Uk (%)	Size (mm)			Weight (Kg)
Rated Capacity (KVA)	HV	LV		Vector Group	I0 (%)	PO	PK	Uk (%)	L	W	H	Oil	Total
50	35~ 38.5	±5% ±2×2.5%	0.4	Yyn0 Dyn11	1.0	0.13	1.14	6.5	1600	1100	1900	230	380	1060
100					0.88	0.185	1.91		1650	1150	1950	350	450	1200
125					0.88	0.215	2.25		1700	1200	2000	450	520	1450
160					0.80	0.225	2.68		1750	1250	2050	600	580	1650
200					0.80	0.27	3.15		1800	1300	2100	700	620	1850
250					0.76	0.32	3.75		1850	1350	2150	850	680	2070
315					0.76	0.385	4.51		1900	1400	2200	900	750	2350
400					0.68	0.465	5.45		1950	1450	2250	1100	860	2600
500					0.68	0.545	6.56		2000	1500	2300	1300	980	3080
630					0.52	0.665	7.47		2100	1600	2350	1500	1050	3600
800					0.52	0.785	8.93		2200	1700	2400	1800	1160	4150
1000					0.52	0.92	10.9		2300	1800	2450	2200	1250	4800
1250					0.48	1.12	13.2		2400	1900	2500	2500	1400	5500
1600					0.48	1.35	15.8		2500	2000	2600	2800	1550	6100
2000					0.44	1.59	19.7		2600	2100	2700	3100	1700	6700
2500					0.44	1.89	23.2		2700	2200	2800	3400	1810	7300

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10-35KV Oil Immersed Distribution Transformer

Product Introduction

Parameters Table

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