FIELD: electricity.
SUBSTANCE: directional power relay comprises a transformer reactor, a transformer, the first and the second single-phase rectifiers, a barrier filter, a smoothing capacitor and a zero indicator, at the same time the input of the first single-phase rectifier is connected to the transformer reactor outlet, the input of the second single-phase rectifier is connected to the transformer outlet, the inlet of the barrier filter is connected to the outlet of the first single-phase rectifier, the zero indicator is connected to the outlet of the barrier filter and to the outlet of the second single-phase rectifier, the smoothing capacitor is connected in parallel to the zero indicator, the transformer reactor is made with a rotary magnetic field and comprises two groups of multi-phase secondary windings, the transformer is also made with a rotary magnetic field and comprises two groups of multiphase secondary windings, at the same time the first and the second single-phase rectifiers are made as multi-phased.
EFFECT: increased efficiency and accuracy of relay operation.
2 dwg
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Authors
Dates
2011-11-27—Published
2009-05-27—Filed