I. Product Description

35kV S11,SZ11 series of oil-immersed power transformers are more advanced in design.The material, the structure and process has been improved greatly. Having beautiful appearance, reliable operation, low loss and low noise, the transformers reach the advanced level compared with similar foreign products. The SZ11 series can adjust voltage manually, electrically or automatically in a side with the help of OLTC on the voltage regulating range, so as to ensure the stability of the output voltage.

II. Product Features

◆Iron core is made of high quality cold-rolled steel, using steel belt to tight and forming the solid frame structure with clamp, which strengthened the core clamping force, effectively reduce the no-load loss and no-load current of transformer and noise.

◆Transformer coil using oxygen free copper with high purity effectively reduce the copper loss. Block, stay fillet made the electric field uniform and increase the reliability.The inner winding support is strengthened, which improves its stability and prevents buckling deformation, improves the resistance of sudden short-circuit capacity of transformer.

◆Capsule or corrugated type of oil conservator can be adopted by the customer’s requirements, which effectively slow down the aging of transformer’s oil. Gas relay with gas collecting device is convenient to operate and improve the effect of heat dissipation by adopting chip radiator.

III. Scope of Application

This product is mainly used for urban and rural power grid in industry and agriculture, or the transmission and distribution engineering industrial and mining enterprises.

IV. Technical Parameters

1. 35KV SZ11 Series Oil-immersed Power Transformer

Rated Capacity(KVA)	Rated Voltage(KV)		Short-Circuit Impedance (%)	Connection Symbol	No-Load Losses(W)	Load Losses (W)	No-Load Current(%)	Weight(Kg)			Outline Dimension (L×W×H，mm)	Installation Dimensions (mm)
	High-Voltage	Low-Voltage						Oil	Body	Outline
2000	35 38.5	6.5 10.5	6.5	Yd11	2.31	19.24	0.80	1850	3450	6500	3150×2110×2810	1070
2500					2.72	20.65	0.80	2110	3950	7500	3170×2200×2770
3150			7		3.24	24.71	0.72	2455	4770	8950	3200×2320×2820
4000					3.88	29.16	0.72	2480	5250	9870	3360×2680×3190
5000					4.64	34.20	0.68	3060	6300	12270	3500×2540×3200
6300			7.5		5.64	36.77	0.68	3230	7150	12800	3950×2720×3200	1475
8000				YNd11	7.88	40.62	0.60	3300	8900	15200	4180×3220×3400
10000					9.28	48.05	0.60	4035	9400	17735	4250×3400×3500
12500			8		10.95	56.86	0.56	4500	12740	20710	4450×3300×3755
16000					13.17	70.32	0.54	5100	14400	24500	4550×3000×3920
20000					15.57	82.79	0.54	6200	18200	30900	4750×3800×4200

Note: The outline dimensions are for reference only. Please refer to our appearance drawings when you order it.

2. 35KV S11 Series Oil-immersed Power Transformer

Rated Capacity (kVA)	Rated Voltage (kV)		Short- Circuit Impedance (%)	Connection Symbol	No-Load Loss (W)	Load Loss(W)	No-Load Current (%)	Weight(kg)			Outline Dimension (L×W×H,mm)	Installation Dimensions (mm)
	High-Voltage	Low-Voltage						Oil	Body	Outline
50	35	0.4	6.5	Dyn11/Nyn0	0.17	1.21/1.15	2.0	345	250	800	1090×940×1870	660
100					0.23	2.02/1.92	1.8	400	540	1150	1130×1140×1980	660
125					0.27	2.38/2.26	1.7	450	570	1300	1250×1270×2010	660
160					0.29	2.83/2.69	1.6	530	620	1555	1290×1300×2030	660
200					0.35	3.33/3.17	1.5	550	780	1650	1350×1320×1990	660
250					0.41	3.96/3.77	1.4	580	830	1720	1750×1150×2020	820
315					0.49	4.76/4.54	1.4	610	920	1850	1850×1210×2090	820
400					0.58	5.75/5.48	1.3	645	1015	2160	2060×1200×2260	820
500					0.69	6.92/6.59	1.2	750	1320	2620	2180×1250×2320	820
630					0.83	7.87	1.1	760	1550	2790	2200×1260×2430	820
800					0.98	9.41	1.0	980	1800	3800	2220×1350×2550	820
1000					1.15	11.55	1.0	1150	2300	4230	2450×1380×2580	820
1250					1.41	13.94	0.9	1230	2380	4480	2480×1600×2500	820
1600					1.70	16.68	0.8	1540	3050	5720	2650×1810×2850	1070
800	35	10.5 6.3 3.15	6.5	Yd11	0.98	9.41	1.0	980	1800	3800	2220×1350×2550	820
1000					1.15	11.55	1.0	1150	2300	4230	2450×1380×2580	820
1250					1.41	13.94	0.9	1230	2380	4480	2480×1600×2500	820
1600					1.70	16.68	0.8	1400	2950	5540	2650×1810×2850	1070
2000					2.18	18.39	0.7	1600	3150	6200	2700×1900×2880	1070
2500					2.56	19.67	0.6	1780	3670	7100	2830×2370×2850	1070
3150	35 38.5	10.5 6.3 3.15	7		3.04	23.09	0.56	1960	4930	8630	2905×2370×2960	1070
4000					3.62	27.36	0.56	2200	5100	9430	2900×2680×3190	1070
5000					4.32	31.38	0.48	3100	6300	11750	3000×2540×3200	1070
6300			7.5		5.25	35.06	0.48	2930	6900	12200	3350×2720×3200	1475
8000	35 38.5	11 10.5 6.6 6.3	7.5	YNd11	7.20	38.48	0.42	3000	8650	14600	3580×3220×3400	1475
10000					8.71	45.32	0.42	3750	9150	17050	3650×3400×3500	1475
12500			8		10.08	53.87	0.4	4200	12300	20050	3850×3300×3750	1475
16000					12.16	65.84	0.4	4800	14000	23900	3950×3400×3850	1475
20000					14.40	79.52	0.4	5850	17850	30250	4150×3800×4200	1475

Notes:

• 1.For transformers with a rated capacity below 500 KVA, the load loss value on the left side of the forward slash in the table applies to the Dyn11 connection group, while the value on the right side applies to the Yyn0 connection group.
• 2.Outline dimensions are for reference only; please refer to the outline drawing provided at the time of order.