A Three-Dimensional Wound Core Leading Wire Structure That Can Balance Resistivity

Abstract

The invention discloses a three-dimensional wound core lead structure capable of balancing resistivity. An x end is connected with a z end through a copper bar IV and is connected a 0-phase leading-out copper bar III through a copper bar II, the z end is connected with the 0-phase leading-out copper bar III through a copper bar VI, the 0-phase leading-out copper bar III is connected between the copper bar II and the copper bar VI, a neutral point 0 is lead out from a middle position of the leading-out copper bar III, a b-phase tail end outlet head y end is connected with a middle part of the copper bar IV through a copper bar VII, an a-phase initial end is led to an a-phase initial end outlet wiring terminal a' through an a-phase initial end outlet lead, a b-phase initial end is lead to a b-phase initial end outlet wiring terminal b' through a b-phase initial end outlet lead, and a c-phase initial end is lead to a c-phase initial end outlet wiring terminal c' through a c-phase initial end outlet lead. By appropriately increasing the length of a relatively short phase lead and shortening the length of a relatively long phase lead, and the purpose that the unbalance rate of three-phase resistance is far lower than the national standard can be achieved only by adjusting the lengths of the leads.

Description

technical field [0001] The invention relates to a lead wire structure of a three-dimensional wound iron core, which belongs to the field of electrical equipment, in particular to a lead wire structure of a three-dimensional wound iron core that can balance resistivity. Background technique [0002] As an emerging technology in the current silicon steel core transformer, the three-dimensional wound core has low no-load loss, energy saving, material saving, three-phase magnetic circuit balance and other advantages, which make this product widely used. [0003] But at present, the low-voltage side of the three-dimensional wound core distribution transformer is not on the same plane because the relative positions of the windings are not on the same plane. In order to facilitate the customer's wiring, it is necessary to lead the outlet terminals at different positions to the same side with current-carrying copper bars, which results in Low-voltage abc three-phase lead wires have ...

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Problems solved by technology

[0003] But at present, the low-voltage side of the three-dimensional wound core distribution transformer is not on the same plane because the relative positions of the windings are not on the same plane. In order to facilitate the customer's wiring, it is necessary to lead the outlet terminals at different positions to the same side with current-carrying copper bars, which results in Low-voltage abc three-phase lead wires have different lengths, so there is a common problem of unbalanced three-phase resistance. In order to solve this problem, a simple method of increasing the cross-section of longer lead wires is currently used. The cross-section is deliberately increased beyond the flow requirements, resulting in a certain degree of material waste, but even so, its three-phase resistance unbalance rate can only be slightly lower than the phase 4% line 2% required by the national standard, such as the technological level If it is unstable, the three-phase resistance unbalance rate may still exceed the standard

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