FIELD: measuring equipment.
SUBSTANCE: invention relates to devices for measuring phase-to-phase voltage. Technical result is achieved by the fact that the interphase voltage sensor module comprises a spacer for holding two current-conducting conductors at a predetermined distance from each other and at least one voltage sensor, located on the spacer between the current-conducting cores, wherein at least one voltage sensor comprises a fiber Bragg grating in contact with the piezoelectric element, which expands and contracts depending on interphase voltage between current conductors.
EFFECT: measurement of interphase voltages of a multiphase power cable without a power supply source at the measurement point, including in underwater or underground media.
20 cl, 2 tbl, 10 dwg
