Technology of the SZ13 Series 35 kV Three-Phase On-Load Tap-Changing Oil-Immersed Power Transformer

The SZ11 and SZ13 series on‑load tap‑changing power transformers are designed using specialized transformer design software, ensuring an advanced design, a rational structure, and high‑quality material selection. Their performance parameters comply with the GB 1094 standard “Power Transformers” and the GB 6451 standard “Technical Parameters and Requirements for Three‑Phase Oil‑Immersed Power Transformers.” These transformers are suitable for urban and rural industrial and agricultural power grids and play a significant role in energy conservation and environmental protection.

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Oil-Immersed Power Transformer Series

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Product Description

　　Product Overview:

　　　　The SZ11 and SZ13 series on‑load tap‑changing power transformers are designed using specialized transformer design software, ensuring an advanced design, a rational structure, and high‑quality materials. Their performance parameters comply with the GB 1094 standard “Power Transformers” and the GB 6451 standard “Technical Parameters and Requirements for Three‑Phase Oil‑Immersed Power Transformers.” These transformers are suitable for urban and rural industrial and agricultural power grids and play a significant role in energy conservation and environmental protection.

　　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 Data Sheet for SZ13 Series 35 kV Three-Phase On-Load Tap-Changing Oil-Immersed Power Transformers

Rated Capacity (kVA)	Rated voltage		Connection Group	No-load current (%)	No-load loss (W)	Load loss (W)	Impedance Voltage (%)
Rated Capacity (kVA)	High voltage (kV)	Low voltage (kV)	Connection Group	No-load current (%)	No-load loss (W)	Load loss (W)	Impedance Voltage (%)
2000	35 ±3×2.5% or 38.5 ±3×2.5%	6.3 10 10.5	Yd11 YNd11	0.8	1730	19230	6.5
2500				0.8	2040	20640	6.5
3150				0.72	2420	24710	7.0
4000				0.72	2900	29155
5000				0.68	3480	34200
6300				0.68	4220	36765	7.5
8000				0.6	5900	40610
10000				0.6	6960	48050
12500				0.56	8205	56850	8.0
16000				0.54	9120	70320
20000				0.54	10800	82780