A commercial capacitance bridge is used with two standard capacitors to determine the ratio error and phase displacement of a 10 kV and 30 kV reference voltage transformers. The bridge is
AI Customer Serviceservices: high-voltage capacitors and voltage transformers. At NIST these two services are per- formed using the same equipment. In fact, in order to caUbrate a voltage transformer, one of
AI Customer ServicePerformance specifications for high voltage capacitors include capacitance range and capacitance tolerance, a percentage of total capacitance. Working DC voltage,
AI Customer ServiceIn this paper, high on/off capacitance ratio radio frequency micro-electro-mechanical-systems (RF MEMS) switches are designed, fabricated, measured and analyzed.
AI Customer ServicePressurized gas capacitors can be used in high-voltage tests as: standards in bridge circuits for capacitance and loss factor measurement; part of potential dividers for high-
AI Customer ServiceIn the case of high accuracy requirements, in particular when measuring other high-voltage standard capacitors, Recent developments in 50 c/s bridge networks with
AI Customer ServiceANY calibrations of high-voltage power equipment depend on standard capacitors. This is the case of volt-age transformers, high-voltage dividers [1], and tangent delta bridges, among
AI Customer ServiceA commercial capacitance bridge is used with two standard capacitors to determine the ratio error and phase displacement of a 10 kV and 30 kV reference voltage transformers. The bridge is
AI Customer ServicePerformance specifications for high voltage capacitors include capacitance range and capacitance tolerance, a percentage of total capacitance. IEEE C37.43 —
AI Customer Servicecapacitors (SC series) are designed to be high precision and stable high voltage reference capacitors with a very low loss factor. With these characteristics, the SC series capacitors are
AI Customer ServiceA commercially available transformer-ratio-arm capacitance bridge is used in two different circuits to measure the voltage dependence of a capacitor by comparing it with a
AI Customer Servicewhich the transformer under calibration is the standard voltage transformer 4820. C 1 is the capacitor under evaluation, C 2 is composed of low voltage standard capacitors. The
AI Customer ServiceThis TechNote has been written as a guide to the operation of and applications for the NIST Capacitor Ratio Bridge (CRB). The theory, design, and operating principles of the
AI Customer ServiceHow much charge is stored in this capacitor if a voltage of (3.00 times 10^3 V) is applied to it? The main advantage of an electrolytic capacitor is its high capacitance
AI Customer ServiceThe schematic diagram of the High Voltage Schering Bridge is shown in Fig. 9.11. The lossy capacitor or capacitor with the dielectric between electrodes is represented as an imperfect
AI Customer ServiceThe high-voltage supply is then used to feed both the voltage transformer and the two high-voltage standard capacitors. During the calibration of the voltage transformer, the two high-voltage capacitors are interchanged and the voltage
AI Customer ServiceMode 1 (V o = 1V dc): In Fig. 2a, both of the capacitors (C 1 and C 2) are in parallel with the DC source through the power switch S 2 and S 3, respectively addition,
AI Customer ServiceThe best low-voltage standard capacitors with 10 pF and 100 pF have a quartz or nitrogen insulation whose dissipation factors are in the range of (2–4) × 10 −6. The Schering
AI Customer ServiceVarious factors affecting the value and voltage dependence of the capacitance of high-voltage compressed-gas capacitors, used as high-voltage measurement standards, are considered.
AI Customer Service4. Voltage Ratio Measurement The voltage ratio of a generalized divider is indi cated primarily by the capacitan<?e balance ~f the bridge. The reduced voltage applIed to capaCItor 0 is
AI Customer ServiceANY calibrations of high-voltage power equipment depend on standard capacitors. This is the case of volt-age transformers, high-voltage dividers [1], and tangent delta bridges, among
AI Customer ServicePressurized gas capacitors can be used in high-voltage tests as: standards in bridge circuits for capacitance and loss factor measurement; part of potential dividers for high-
AI Customer ServiceThe service for high-voltage capacitors provides measurements of capacitance and dissipation factor at applied voltages ranging from 100 V to 170 kV at 60 Hz depending on
AI Customer ServiceThe service for high-voltage capacitors provides measurements of capacitance and dissipation factor at applied voltages ranging from 100 V to 170 kV at 60 Hz depending on the nominal...
AI Customer ServicePerformance specifications for high voltage capacitors include capacitance range and capacitance tolerance, a percentage of total capacitance. Working DC voltage, insulation resistance, dissipation factor, and temperature coefficient are additional considerations.
Calibrations at frequencies from 50-400 Hz are avail- able over a more limited voltage range. The service for high-voltage capacitors provides measurements of capacitance and dissipation factor at applied voltages ranging from 100 V to 170 kV at 60 Hz depending on the nominal capacitance.
The ratio of the two capacitors in eq (2) can be measured using the circuit of figure 2. The measurement of a voltage transformer or a capacitor both involve the measurement of the ra- tio of two standard capacitors. The measurement of capacitors will be discussed below followed by a discussion on the measurement of voltage trans- formers.
The best low-voltage standard capacitors with 10 pF and 100 pF have a quartz or nitrogen insulation whose dissipation factors are in the range of (2–4) × 10 −6. The Schering and Vieweg compressed-gas capacitors (see Sect. 11.5), which are used as CN at high voltages of up to 1.5 MV, have about twice the dissipation factor.
The accuracy of capacitance and dissipation factor measurements depends on the quality of both the standard capacitor CN and the measuring bridge. The best low-voltage standard capacitors with 10 pF and 100 pF have a quartz or nitrogen insulation whose dissipation factors are in the range of (2–4) × 10 −6.
The development of very precise current comparators with high permeability core and electromagnetic shielding has resulted in a new type of high-voltage bridge for capacitance and dissipation factor measurements.
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