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Users' Guide to the NIST-High-Voltage Capacitance Ratio Bridge



Eric D. Simmon, Gerald FitzPatrick, O. Petersons


This 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 CRB, sources of measurement error, and principal applications are discussed in Part I. This part includes a description of magnetic, capacitive, microphonic, grounding, and other error sources, current comparator theory, and principles of the error correction circuitry of the bridge. Also discussed are the principal uses of the CRB for measurement of capacitance, resistance, inductance, and the ratios of voltage transformers and dividers. Part II is written as an operating manual describing the step-by-step procedures for setting up and performing the measurements described in Part I. It also includes tests to verify accurate operation of the bridge and a Troubleshooting Guide to provide guidance in overcoming measurement problems. Uncertainty analyses are provided for the principal measurement applications.
Technical Note (NIST TN) - 1442
Report Number


high voltage capacitance ration bridge, voltage dividers, voltage transformers


Simmon, E. , FitzPatrick, G. and Petersons, O. (2001), Users' Guide to the NIST-High-Voltage Capacitance Ratio Bridge, Technical Note (NIST TN), National Institute of Standards and Technology, Gaithersburg, MD (Accessed May 30, 2024)


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Created March 27, 2001, Updated October 12, 2021