METHOD OF THE AC VOLTAGE IDENTIFICATION IN THE CONDUCTOR WITH THE HELP OF THE CASTING HERCON Russian patent published in 2017 - IPC G01R19/30 G01R31/00 

FIELD: electricity.

SUBSTANCE: method for identifying alternating current in a conductor with a closing reed switch, which consists in setting the reed switch near the conductor, adjusting it so that it operates and closes the contacts at the I_cp current in the conductor, returns to its original position, and opens the contacts at the I_c current. After adjusting the reed switch, the electrical installation is turned on and when an alternating current appears in the conductor: a) the time interval t_1,2 is measured between the moments of the first and second contacts of the reed switch and the time intervals between the next contacts of the reed switch are continued to be measured until 0.01 sec; b) the time interval between the moment t_CP⁽ⁿ⁾ of the closure and the moment t_B⁽ⁿ⁾ of opening the contacts is measured, the time of the opening moment t_B⁽ⁿ⁾ of the reed switch is fixed and the amplitude of the alternating current is determined: where ω=2πƒ; f is the frequency of the alternating current; c) the time interval t₀₁⁽ⁿ⁾ is determined from the moment t_B⁽ⁿ⁾ of the reed switch contact opening to the instant t₀⁽ⁿ⁾ of the AC sinusoidal transition through zero: d) then the time of the sinusoid transition moment through zero is determined t₀⁽ⁿ⁾=t_B⁽ⁿ⁾+t₀₁⁽ⁿ⁾ and is remembered; e) the duration of the alternating current sinusoid half-wave t_T/2=t₀₁⁽ⁿ⁾-t₀^(n-1) is determined; f) if t_T/2=0.01 s, then the measurement of the time interval t₁⁽ⁿ⁺¹⁾ between closing and opening the reed switch contacts and actions b), c), d), e) is repeated; g) for other values of t_T/2, or when t₁⁽ⁿ⁾≥0.01 s, or t₁⁽ⁿ⁾≥1.2⋅t₁^(n-1), or , the time interval t₁⁽ⁿ⁺¹⁾ between the closure and opening the reed switch contacts is measured, steps b), c), d) are repeated and the duration of the period t_T=t₀⁽ⁿ⁺¹⁾-t₀^(n-1) is determined; h) if t_T=0.02 s, then the measurement of the time interval t₁⁽ⁿ⁺²⁾ between the closure and opening of the reed switch contacts and the actions b), c), d), e) are repeated; i) for other values of t_T, the AC phase shift is determined: .

EFFECT: expansion of the use of a method of the ac voltage identification in the conductor with the help of the casting hercon by defining moments of current sinewave transition through zero.

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