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1. (WO2018176868) THREE-DIMENSIONAL WOUND CORE TRANSFORMER HIGH-VOLTAGE LEAD STRUCTURE

Pub. No.:    WO/2018/176868    International Application No.:    PCT/CN2017/112732
Publication Date: Fri Oct 05 01:59:59 CEST 2018 International Filing Date: Sat Nov 25 00:59:59 CET 2017
IPC: H01F 27/40
H01F 27/29
Applicants: HAIHONG ELECTRIC CO., LTD.
海鸿电气有限公司
Inventors: XU, Kaixuan
许凯旋
ZHAI, Lizhen
翟丽珍
LIANG, Qingning
梁庆宁
LUO, Jingtao
罗景桃
ZHOU, Libo
周利波
Title: THREE-DIMENSIONAL WOUND CORE TRANSFORMER HIGH-VOLTAGE LEAD STRUCTURE
Abstract:
Disclosed is a three-dimensional wound core transformer high-voltage lead structure, comprising a three-dimensional wound core (1) formed by three rectangular single frames, and A-phase, B-phase and C-phase windings (2), wherein the three-dimensional wound core comprises three core posts and an upper yoke and a lower yoke, the upper yoke and lower yoke of the three-dimensional wound core are respectively triangular structures, the A-phase, B-phase and C-phase windings are correspondingly arranged on the three core posts, each winding comprises an internal low-voltage winding and an external high-voltage winding, and the A-phase, B-phase and C-phase high-voltage windings are jointly connected via a lead-out line (3) to a tap changer (4); and characterised in that the tap changer is located outside the triangular structure of the upper yoke, and on a vertical extension line at a mid-point between the A-phase and the C-phase windings. The high-voltage lead structure means that the lead length is greatly shortened, few lead clamps are needed, and lead to ground discharge points are significantly reduced, improving the reliability of transformer products.