Dowei Electric Power Transformer SFZ-33,SFZ-66,SFZ-110,SFZ-220,SFZ-330

Product catalog summary

Overview: This document provides detailed specifications for power transformers manufactured by Ningbo Dowei Electric Co., Ltd. It covers transformers with voltage ratings of 35kV, 66kV, 110kV, 220kV, and 330kV, highlighting their compliance with international standards, design features, and technical specifications.

General Specifications:

Compliance with standards: IEC 60076, ANSI/IEEE Std C57.12, NEMA.
Certifications: ISO 9001, KEMA, CESI, CE, TUV, UL, ASTA.
Design features: Low loss, low partial discharge, low temperature rise, seismic design, and high altitude correction.
Materials: Mineral Oil / Vegetable Oil (FR3), Free PCB.

35kV Power Transformers:

Available in three-phase, two-winding configurations with both NLTC and OLTC options.
Rated power ranges from 630 kVA to 31500 kVA.
Voltage and tapping range: 30±5% to 38.5±5% for NLTC; 30±3×2.5% to 38.5±3×2.5% for OLTC.
Vector groups: Yd11, Dy11, YNd11, Dyn11.

66kV Power Transformers:

Available in three-phase, two-winding configurations with both NLTC and OLTC options.
Rated power ranges from 630 kVA to 63000 kVA.
Voltage and tapping range: 63±5% to 69±5% for NLTC; 63±8×1.25% to 69±8×1.25% for OLTC.
Vector groups: Yd11, Dyn11, YNd11.

110kV Power Transformers:

Available in three-phase, two-winding configurations with both NLTC and OLTC options.
Rated power ranges from 6300 kVA to 120000 kVA.
Voltage and tapping range: 110±2×2.5% to 138±2×2.5% for NLTC; 110±8×1.25% to 138±8×1.25% for OLTC.
Vector group: YNd11.

220kV Power Transformers:

Available in three-phase, three-winding configurations with both NLTC and OLTC options.
Rated power ranges from 31500 kVA to 300000 kVA.
Voltage and tapping range: 220±2×2.5% to 242±2×2.5% for NLTC; 220±8×1.25% to 242±8×1.25% for OLTC.
Vector group: YNyn0d11.

330kV Power Transformers:

Available in three-phase, two-winding and three-winding auto-transformer configurations with OLTC.
Rated power ranges from 90000 kVA to 720000 kVA.
Voltage ratios include 345, 345±2×2.5%, 363, 363±2×2.5%/10.5, 13.8, 15.75, 18, 20kV.
Vector groups: YNd11, YNa0d11.

Key Features:

Seismic design compliant with ETGI-1.020, IEEE Std 693, NCh2369.
Structural design adheres to ASTM A325, ANSI/AISC 360, AWS D1.1.
High altitude correction up to ~5000m as per IEC 60076 & IEEE C57.12.

Catalog excerpts

Dowei Electric Power Transformer SFZ-33,SFZ-66,SFZ-110,SFZ-220,SFZ-330-1

Power Transmission & Distribution One stop equipments solution Power Transformer

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Dowei Electric Power Transformer SFZ-33,SFZ-66,SFZ-110,SFZ-220,SFZ-330-2

35kV Power TransformerGeneral Description: • IEC 60076, ANSI/IEEE Std C57.12, NEMA • ISO 9001, KEMA, CESI, CE, TUV, UL, ASTA • Mineral Oil / Vegetable Oil (FR3), Free PCB • Low loss, Low partial discharge, Low temperature rise • Seismic design, ETGI-1.020, IEEE Std 693, NCh2369 • Structural design, ASTM A325, ANSI/AISC 360, AWS D1.1 • High altitude correction per IEC 60076 & IEEE C57.12, ~ 5000m 35kV Three-phase Two-winding Power Transformer with NLTC Voltage and tapping range(kV) No-load Load loss No-load NINGBO DOWEI ELECTRIC CO., LTD. 608, Lingyun Building No.1, High-tech Zone, Ningbo, Zhejiang,...

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Dowei Electric Power Transformer SFZ-33,SFZ-66,SFZ-110,SFZ-220,SFZ-330-3

35kV Three-phase Two-winding Power Transformer with OLTC Rated Power (kVA) Voltage and tapping range(kV) HV Vector group No-load current (%) NINGBO DOWEI ELECTRIC CO., LTD. 608, Lingyun Building No.1, High-tech Zone, Ningbo, Zhejiang, China. 315048 Tel: +86-15088801930 | [email protected] | www.dowei-electric.com

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Dowei Electric Power Transformer SFZ-33,SFZ-66,SFZ-110,SFZ-220,SFZ-330-4

66kV Power TransformerGeneral Description: • IEC 60076, ANSI/IEEE Std C57.12, NEMA • ISO 9001, KEMA, CESI, CE, TUV, UL, ASTA • Mineral Oil / Vegetable Oil (FR3), Free PCB • Low loss, Low partial discharge, Low temperature rise • Seismic design, ETGI-1.020, IEEE Std 693, NCh2369 • Structural design, ASTM A325, ANSI/AISC 360, AWS D1.1 • High altitude correction per IEC 60076 & IEEE C57.12, ~ 5000m 66kV Three-phase Two-winding Power Transformer with NLTC Voltage and tapping range(kV) No-load Load loss No-load NINGBO DOWEI ELECTRIC CO., LTD. 608, Lingyun Building No.1, High-tech Zone, Ningbo, Zhejiang,...

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Dowei Electric Power Transformer SFZ-33,SFZ-66,SFZ-110,SFZ-220,SFZ-330-5

66kV Three-phase Two-winding Power Transformer with OLTC Rated Power (kVA) Voltage and tapping range(kV) No-load current (%) Vector group NINGBO DOWEI ELECTRIC CO., LTD. 608, Lingyun Building No.1, High-tech Zone, Ningbo, Zhejiang, China. 315048 Tel: +86-15088801930 | [email protected] | www.dowei-electric.com

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Dowei Electric Power Transformer SFZ-33,SFZ-66,SFZ-110,SFZ-220,SFZ-330-6

110kV Power TransformerGeneral Description: • IEC 60076, ANSI/IEEE Std C57.12, NEMA • ISO 9001, KEMA, CESI, CE, TUV, UL, ASTA • Mineral Oil / Vegetable Oil (FR3), Free PCB • Low loss, Low partial discharge, Low temperature rise • Seismic design, ETGI-1.020, IEEE Std 693, NCh2369 • Structural design, ASTM A325, ANSI/AISC 360, AWS D1.1 • High altitude correction per IEC 60076 & IEEE C57.12, ~ 5000m 110kV Three-phase Two-winding Power Transformer with NLTC Voltage and tapping range(kV) No-load Load loss No-load NINGBO DOWEI ELECTRIC CO., LTD. 608, Lingyun Building No.1, High-tech Zone, Ningbo, Zhejiang,...

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Dowei Electric Power Transformer SFZ-33,SFZ-66,SFZ-110,SFZ-220,SFZ-330-7

110kV Three-phase Two-winding Power Transformer with OLTC Voltage and tapping range(kV) No-load current (%) 608, Lingyun Building No.1, High-tech Zone, Ningbo, Zhejiang, China. 315048 Tel: +86-15088801930 | [email protected] | www.dowei-electric.com

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Dowei Electric Power Transformer SFZ-33,SFZ-66,SFZ-110,SFZ-220,SFZ-330-8

220kV Power TransformerGeneral Description: • IEC 60076, ANSI/IEEE Std C57.12, NEMA • ISO 9001, KEMA, CESI, CE, TUV, UL, ASTA • Mineral Oil / Vegetable Oil (FR3), Free PCB • Low loss, Low partial discharge, Low temperature rise • Seismic design, ETGI-1.020, IEEE Std 693, NCh2369 • Structural design, ASTM A325, ANSI/AISC 360, AWS D1.1 • High altitude correction per IEC 60076 & IEEE C57.12, ~ 5000m 220kV Three-phase Three-winding Power Transformer with NLTC Voltage and tapping range(kV) No-load current (%) Step Down 220kV Three-phase Three-winding Power Transformer with OLTC NINGBO DOWEI ELECTRIC...

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Dowei Electric Power Transformer SFZ-33,SFZ-66,SFZ-110,SFZ-220,SFZ-330-9

330kV Power Transformer General Description: • IEC 60076, ANSI/IEEE Std C57.12, NEMA • ISO 9001, KEMA, CESI, CE, TUV, UL, ASTA • Mineral Oil / Vegetable Oil (FR3), Free PCB • Low loss, Low partial discharge, Low temperature rise • Seismic design, ETGI-1.020, IEEE Std 693, NCh2369 • Structural design, ASTM A325, ANSI/AISC 360, AWS D1.1 • High altitude correction per IEC 60076 & IEEE C57.12, ~ 5000m 330kV Three-phase Two-winding Power Transformer with NLTC Impedance No-load (%) loss (kW) No-load current (%) Overall Dimension (mm) Center 330kV Three-phase Three-winding Auto-Transformer with OLTC...

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Dowei Electric Power Transformer SFZ-33,SFZ-66,SFZ-110,SFZ-220,SFZ-330-10

Impedance No-load (%) loss (kW) No-load current (%) DOM/El Overall Dimension (mm) Center NINGBO DOWEI ELECTRIC CO., LTD.608, Lingyun Building No.1, High-tech Zone, Ningbo, Zhejiang, China. 315048 Tel: +86-15088801930 | [email protected] | www.dowei-electric.com

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