Coil lead structure for increasing wiring electrical distance

Abstract

The invention discloses a coil lead structure for increasing a wiring electrical distance. The coil lead structure for increasing the wiring electrical distance comprises an A phase coil, a B phase coil and a C phase coil, wherein an X connection wire is led out of the bottom of a high voltage side of the A phase coil, a Y connection wire and a Y' connection wire are respectively led out of the bottom of a high voltage side of the B phase coil, a Z connection wire is led out of the bottom of a high voltage side of the C phase coil, the X connection wire is connected with the Y connection wire, and the Y' connection wire is connected with the Z connection wire. The coil lead structure for increasing the wiring electrical distance uses the design that lead heads of the B phase coil are respectively used as the Y connection wire and the Y' connection wire, and thereby achieves the purpose that a connection between the X connection wire and the Z connection wire are not achieved through the B phase coil when Yyn0 is wired, and further can achieve the purpose that the size of an oil tank does not need to be increased on the premise of guaranteeing an insulation distance. Additionally, the branch connection wires of the B phase coil and the C phase coil are led from the high voltage sides, the branch connection wire of the A phase coil is led from a low voltage side of the A phase coil, and therefore the enough insulation distance among the branch connection wires is guaranteed on the premise that the number of lead heads of the branch connection wires is large.

Description

technical field [0001] The invention relates to a coil lead wire structure for increasing the electrical distance of the wiring, and belongs to the technical field of transformer coil wiring. Background technique [0002] Nowadays, distribution transformers and power transformer products require safe and reliable operation and low cost. Therefore, under the premise of satisfying sufficient insulation distance, it is one of the key contents of transformer design to ensure low cost of products. To achieve Yyn0, the conventional wiring is: connect X, Y, Z, but for high-voltage transformers (such as 35KV, 110KV level), the XYZ connection needs to have a certain insulation distance from the coil, and the XZ connection is insulated when passing through the B-phase coil If the distance is small, if you want to ensure the insulation distance, you need to increase the fuel tank, and the cost will increase; secondly, when the branch line is ±4×2.5 or ±8×2.5 and above, when the branch ...

AI Technical Summary

Problems solved by technology

To achieve Yyn0, the conventional wiring is: connect X, Y, Z, but for high-voltage transformers (such as 35KV, 110KV level), the XYZ connection needs to have a certain insulation distance from the coil, and the XZ connection is insulated when passing through the B-phase coil If the distance is small, if you want to ensure the insulation distance, you need to increase the fuel tank, and the cost will increase; secondly, when the branch line is ±4×2.5 or ±8×2.5 and above, when the branch line exits from one side, that is, the high-voltage branch line comes from one side. When routing wires on the side, due to the large number of branch wires and high voltage level, the insulation distance will become very tight, or even insufficient. Simply adding insulation can no longer guarantee the reliability of the transformer.

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