DEVICE FOR MEASUREMENT OF COEFFICIENTS OF ZERO AND NEGATIVE PHASE-SEQUENCES OF VOLTAGE OF THREE-PHASE CIRCUIT

摘要

FIELD: digital measuring equipment; can be used for measurement of coefficients of zero and negative phase-sequences of three-phase circuit. SUBSTANCE: the device for measurement of components of positive and negative phase- sequences of voltages of three-phase generators uses two analog-to-digital converters, voltage divider consisting of two similar resistors, angle encoder, interface unit and a microcomputer. Introduction of an additional analog-to-digital converter, elimination of the voltage divider provides for measurement of asymmetry coefficients of zero and negative phase-sequences; the interface unit has three input-output ports, local line, data bus buffer and a control system. EFFECT: improved design.