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December 12, 2016

We are pleased to announce that Power Equipment Sales has been named as the exclusive Sales Representative Firm for Harmonics Limited Inc. in New England.

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September 19, 2016

Harmonics Limited featured in High-Profile Magazine

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Glossary Of Terms


A method of connecting three phase transformer windings so that one end of each of the three phase coils is connected together to a common point. The other ends of the three phase windings are connected to the phase conductors. The common point is connected to a fourth line or load wire, called the “neutral” wire. With this configuration, single-phase loads can be connected from each phase wire to the neutral wire (aka phase-to-neutral, line-to-neutral). The current in each phase wire returns to the transformer through the neutral wire. When only balanced fundamental currents are flowing in the phase wires, this configuration has the advantage that no current flows in the neutral, due to phase cancellation. If triplen harmonic currents are present in the phase wires, however, the triplen harmonic currents do not cancel in the neutral, but are additive. Thus the neutral can carry more harmonic or rms current than any of the phase wires. Schematically the three phase windings take the form of the letter “Y,” hence the name wye connection. Some transformers are described as a “Delta-Wye” transformer, indicating that the primary side of the transformer has a Delta and the secondary has a Wye configuration. (see: Conductor; Delta Connection; Load Balance; Phase; Transformer; Neutral)

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