The following information was submitted:
Transactions: WSEAS TRANSACTIONS ON SYSTEMS AND CONTROL
Transactions ID Number: 89-643
Full Name: Eduardo Mario Dias
Position: Professor
Age: ON
Sex: Male
Address: Av. Prof. Luciano Gualberto, travessa 3, nº 158, Cep. 05507-010 – Cidade Universitária, São Paulo/SP
Country: BRAZIL
Tel: 3091 5113
Tel prefix: +55 11
Fax:
E-mail address: emdias@pea.usp.br
Other E-mails: wellington.usp@gmail.com
Title of the Paper: Inductive Voltage Transformers Calibration by Parameters Measured in the Field
Authors as they appear in the Paper: Augusto F Brandão Jr, Izael P Silva, Antonio C Silos, Dimetri Ivanov, Eduardo Mario Dias
Email addresses of all the authors: brandao@pea.usp.br, idasilva@tech.mak.ac.ug, acsilos@iee.usp.br, dimetri@uol.com.br, emdias@pea.usp.br
Number of paper pages: 10
Abstract: The accuracy class of an IVT – Inductive Voltage Transformer – is typically assessed in laboratory installations either by comparing with another IVT presenting greater accuracy and traceable to a national laboratory or by using a capacitive divider. Calibration in the field (electrical substation) using internal parameters is considered herein, using results obtained from typical open and short circuit tests and winding resistances, performed with common meters. A Möllinger & Gewecke graphic diagram is employed together with the results of an accuracy test previously carried out to determine the exact value of the winding turn relation and of the primary winding dispersion reactance. These values are used to calculate the phase and ratio errors, which must lie between definite limits, defined by the accuracy class of the instrument. Four commercial IVTs were tested to determine the validity of the procedure. The errors are compared with those obtained with the Sch!
ering-Alberti method (AC Bridge and comparison with standard IVT).
Keywords: Instrument transformers, Inductive voltage transformer, Voltage transducers, Measurement errors
EXTENSION of the file: .pdf
Special (Invited) Session: On Site Calibration of Inductive Voltage Transformers
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