Instrument Voltage Transformers (VT) are well known for their critical behavior when subjected to fast impulse voltages. Furthermore, the accuracy of VT is defined by IEC Standards only at power frequency and doesn't consider fast impulse response. Under these conditions the VT may introduce errors in voltage measurements and the transmitted signals may create overvoltages in correspondence of the secondary circuitry and by nominal withstand. The paper reports experimental analysis on Instrument Voltage Transformers response, in time domain, to a fast voltage impulse (1.2/50 μs). The main experimental results on three commercial Instrument Voltage Transformers, having similar features but manufactured by different Producers, are presented and discussed. Also some considerations are reported considering the shielding effects of such components.

Instrument Voltage Transformer time-response to fast impulse / Lamedica, Regina; Pompili, Massimo; Cauzillo, B. A.; Sangiovanni, Silvia; Calcara, Luigi; Ruvio, Alessandro. - ELETTRONICO. - 2016:(2016), pp. 400-405. (Intervento presentato al convegno 17th International Conference on Harmonics and Quality of Power, ICHQP 2016 tenutosi a Ouro Minas Palace Hotel, bra nel 2016) [10.1109/ICHQP.2016.7783305].

Instrument Voltage Transformer time-response to fast impulse

LAMEDICA, Regina;POMPILI, Massimo;SANGIOVANNI, Silvia;CALCARA, Luigi;RUVIO, ALESSANDRO
2016

Abstract

Instrument Voltage Transformers (VT) are well known for their critical behavior when subjected to fast impulse voltages. Furthermore, the accuracy of VT is defined by IEC Standards only at power frequency and doesn't consider fast impulse response. Under these conditions the VT may introduce errors in voltage measurements and the transmitted signals may create overvoltages in correspondence of the secondary circuitry and by nominal withstand. The paper reports experimental analysis on Instrument Voltage Transformers response, in time domain, to a fast voltage impulse (1.2/50 μs). The main experimental results on three commercial Instrument Voltage Transformers, having similar features but manufactured by different Producers, are presented and discussed. Also some considerations are reported considering the shielding effects of such components.
2016
17th International Conference on Harmonics and Quality of Power, ICHQP 2016
fast transient; instrument voltage transformers; lighting impulse; power quality; computer networks and communications; signal processing; energy engineering and power technology; fuel technology; electrical and electronic engineering
04 Pubblicazione in atti di convegno::04b Atto di convegno in volume
Instrument Voltage Transformer time-response to fast impulse / Lamedica, Regina; Pompili, Massimo; Cauzillo, B. A.; Sangiovanni, Silvia; Calcara, Luigi; Ruvio, Alessandro. - ELETTRONICO. - 2016:(2016), pp. 400-405. (Intervento presentato al convegno 17th International Conference on Harmonics and Quality of Power, ICHQP 2016 tenutosi a Ouro Minas Palace Hotel, bra nel 2016) [10.1109/ICHQP.2016.7783305].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/927391
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