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High voltage capacitance bridge can be calibrated at fixed ratios using traceable standard capacitors. Typical ratios to be calibrated are 10 to 1 and 100 to 1. Substitution method can be used to reduce bridge related errors and uncertainties. When a capacitor under calibration deviates significantly from the reference capacitor, substitution method is not any more applicable and linearity of a capacitance...
This paper describes the performance of a wideband HVDC reference divider. The divider concept is a shielded modular divider and it is intended for traceable calibration of HVDC measuring systems up to 1000 kV in customers' laboratories. The first priority in the design was the accuracy of HVDC measurements. In addition, the divider was designed to have wide bandwidth, both to enable measurement of...
Comparison of loss angle measurements and measurement techniques at power frequency up to 10 kV are presented. The loss angle standards developed by VNIIM are based on low loss ceramic capacitors with a detachable loss resistor in series with it. The tand values of the studied standards ranged from − 1·10−4 to 1000·10−4. The loss angle standards were characterized using established references at VNIIM...
This paper describes design principles of a wideband HVDC reference divider. The modular divider will be used for traceable calibration of HVDC measuring systems up to 1000 kV in customers' laboratories. The first priority in the design was the accuracy of HVDC measurements. In addition the divider was designed to have wide bandwidth, both to enable measurement of ripple voltages and to prevent damage...
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