132-Kv. Shielded Potentiometer for Determining the Accuracy of Potential Transformers

Weller, Cornell

doi:10.1109/t-aiee.1929.5055293

Cited by 6 publications

(1 citation statement)

References 2 publications

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“… 4 Similar arrangements applied to high voltage transformer testing have been described by Silsbee [ 10 ] and Weiler [ 11 ]. …”

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confidence: 99%

Evaluation of the NBS unit of resistance based on a computable capacitor

Cutkosky¹

1961

J. RES. NATL. BUR. STAN. SECT. A.

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An e valuat ion of t he uni t of resistance ma in tain ed at t he Natio na l Burea u of Stan da rds, based on t he prototype stand a rds of le ngt h and t ime, is d escribed. The evalu at ion is based o n a no min ally one-picofa ra d ca p a~i tor whose valu e m ay be calc ul a ted fro m its mec ha nical dimen. lio ns to hig h acc uracy. This capac ito r is used to calibrate a n O.Ol-micl"Ofar ad capacito r. A fr equency-dep enden t bridge in volving t his ca pac itor e~tab li s h es t he value of a lO'-ohm resisto r. Co mpa rison of t hat re.;istor wi t h t he ba nk of o ne-o hm res isto rs maintaining t he NBS uni t of resista nce es ta blis hes t hat t his unit is flB U= l.000002 3 ohms ± 2.1 ppm.Th e in d ica ted un certa in ty is an est imated 50 percent error of t he repo rted value based on t he s tat io t ica l uJl certain ty o f t he meas urements a nd a ll owin g for kn own so urces of p ossible sys te mat ic errors ot her t han in t he sp eed of li g ht , a ss uming t ha t t he speed o f li g ht c = 2.997925 X J QIO c m/sec.

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“… 4 Similar arrangements applied to high voltage transformer testing have been described by Silsbee [ 10 ] and Weiler [ 11 ]. …”

mentioning

confidence: 99%

Evaluation of the NBS unit of resistance based on a computable capacitor

Cutkosky¹

1961

J. RES. NATL. BUR. STAN. SECT. A.

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IEEE Standard Requirements for Instrument Transformers

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IEEE Standard Requirements for Instrument Transformers

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Electrical, dimensional, and mechanical characteristics are covered, taking into consideration certain safety features, for current and inductively coupled voltage transformers of types generally used in the measuremtn of electricity and the control of equipment assoicated with the generation, transmission, and distribution of alternating current. The aim is to provide a basis for performance, interchangeability, and safety of equipment covered and to assist in the proper selection of such equipment. Accuracy classes for metering service are provided. The test code covers measurment and calculation of radio and phase angle, demagnetization, impedance and excitation measurements, polarity determination, resistance measurements, short-time characteristics, temperature rise tests, dielectric tests, and measurment of open-circuit voltage of current transformers.

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132-Kv. Shielded Potentiometer for Determining the Accuracy of Potential Transformers

Cited by 6 publications

References 2 publications

Evaluation of the NBS unit of resistance based on a computable capacitor

Evaluation of the NBS unit of resistance based on a computable capacitor

IEEE Standard Requirements for Instrument Transformers

IEEE Standard Requirements for Instrument Transformers

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