| 摘要 |
FIELD: electrical engineering. SUBSTANCE: gear for uninterrupted control of electric conductance includes at least one measuring module connected between two conductors of power supply system. Measurement cycle is divided into two periods. In the course of first period module makes measurements F1, F2 of first constant component of voltage V1 which presents parasitic components of direct current supplied to leads-out of module. During second period module inputs constant component of current into power supply system and carries out measurements F3, F4 of second constant component of voltage V2 supplied to leads-out of module. Difference Vc between second and first components is used to determine break of conductance. In this case resistance of line upwards from measuring module is proportional to this difference Vc. First and second components V1, V2 are obtained by calculation of values of selects of constant voltage measured during measurement periods Tm1, Tm2 having length lesser or equal to duration of mentioned first and second periods. EFFECT: improved authenticity of control. |
