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Dowei Electric Earthing Transformer DKS

Dowei Electric Earthing Transformer DKS

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Dowei Electric Earthing Transformer DKS

Product catalog summary

General Description:

The document outlines specifications for earthing transformers, specifically Zig Zag transformers, which are used to create a neutral point in a network and limit line-to-earth current during system earth faults.
Compliance with standards such as IEC 60076-6, ANSI/IEEE Std C57.12, and NEMA is highlighted, along with certifications like ISO 9001, KEMA, CESI, CE, TUV, UL, and ASTA.
The transformers are designed for seismic conditions and high altitudes, with structural design adhering to ASTM A325, ANSI/AISC 360, and AWS D1.1.
They use mineral or vegetable oil (FR3) and are free of PCBs.

Typical Specifications:

35kV Earthing Transformer:
- Rated Voltage: 30-36 kV with a tapping range of ±5% or ±2x2.5%.
- Vector Group: ZN / Zig-Zag.
- Zero Phase Impedance ranges from 22.9 to 95.3 Ω.
- Rated Short-time Neutral Current varies from 200 to 1100 A with durations of 10 to 30 seconds.
10kV Earthing Transformer:
- Rated Voltage: 6-11 kV with a tapping range of ±5% or ±2x2.5%.
- Vector Group: ZN / Zig-Zag.
- Zero Phase Impedance ranges from 10 to 190.5 Ω.
- Rated Short-time Neutral Current varies from 100 to 1050 A with durations of 10 to 30 seconds.

Catalog excerpts

Dowei Electric Earthing Transformer DKS-1

Power Transmission & Distribution One stop equipments solution Earthing Transformer

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Dowei Electric Earthing Transformer DKS-2

General Description: • IEC 60076-6, ANSI/IEEE Std C57.12, NEMA • ISO 9001, KEMA, CESI, CE, TUV, UL, ASTA • Mineral Oil / Vegetable Oil (FR3), Free PCB • 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 • Earthing transformer creates a neutral point for a network • Limit the line to earth current under system earth fault condition • Z connection provides linear and specified zero sequence impedance Rated Voltage (kV) Tapping range Vector Group Zero Phase Rated Short-time Duration...

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Dowei Electric Earthing Transformer DKS

Dowei Electric Earthing Transformer DKS

Catalog excerpts

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