| 摘要 |
FIELD: electric engineering. ^ SUBSTANCE: voltage divided has high-voltage arm made of R-C-r units connected in series. Each unit has capacitor and low-ohmic damping resistor connected in series with and high-value resistor to shunt the connection. Low-voltage arm of the divided is split to two parts: low-voltage unit and companion unit, both connected together by coaxial cable. Low-voltage unit ha capacitor C2 and low-ohmic resistor r2; capacitor and resistor are both shunted by high-value resistor R2. Companion unit has capacitor C3 connected in parallel high-value resistor R3. Resistor r3 being equal to wave resistance of cable is connected in series with R3. Capacitor C3 is composed of two capacitors connected in parallel to meet the condition of C3=C30+DeltaC3. C30 has constant value and DeltaC3 has to be adjustable capacitor. Method of compensation of influence of divider capacitance on division factor of divider is based on tuning of division ratio after the final position of diver among rest members of high-voltage testing circuit was found. Calibration voltage U1 of any frequency is applied to divider, output voltage U2 is calculated, division ratios are calculated and values of tuned capacitance are reduced till getting value at which value the division ration would correspond to its nominal meaning. ^ EFFECT: higher possibility of compensation of capacitance. ^ 4 cl, 3 dwg |
