Protection of telecommunication equipment from nearby lightning magnetic field

Barbosa, Célio Fonseca; Nallin, F.E.

doi:10.1109/sipda.2011.6088418

Cited by 3 publications

(5 citation statements)

References 2 publications

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“…For high frequencies, the apparent permeability of steel drops significantly [14], so that it is considered that the steel core is absent. As described in [15], the presence of a metallic chassis will significantly attenuate the magnetic field and the induced voltage. As the body and cover of the chassis make electric contact only through the screws located at its corners, the attenuation has to be evaluated experimentally.…”

Section: Protection Of the Current Transducermentioning

confidence: 99%

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Lightning protection of a smart grid sensor

Barbosa

Nallin

2015

Electric Power Systems Research

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Section: Protection Of the Current Transducermentioning

confidence: 99%

“…The attenuation of the magnetic field by the sensor chassis is calculated with the procedure described in [15], using the data shown in Fig. 11 and considering that the distance between the conductor and the MFA is 0.26 m. Neglecting the inter-winding capacitance, the voltage induced in the MFA can be obtained by:…”

Section: Protection Of the Current Transducermentioning

confidence: 99%

Lightning protection of a smart grid sensor

Barbosa

Nallin

2015

Electric Power Systems Research

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“…This paper is dedicated to the lightning protection of the sensor, as it has sensitive electromagnetic field interfaces and it is also placed in close proximity to the power conductor. The concentrator falls in a more general category of electronic equipment that has been treated elsewhere, e.g., [2] and [3].…”

Section: A General Overviewmentioning

confidence: 99%

“…As described in [2], the presence of a metallic cabinet will significantly attenuate the magnetic field and the induced voltage. However, due to the relatively high mutual inductance between the line conductor and the MFA, additional protective measures are necessary.…”

Section: Protection Of the Rf Circuitrymentioning

confidence: 99%

Lightning protection of a smart grid sensor

Barbosa

Nallin

2013

2013 International Symposium on Lightning Protection (XII SIPDA)

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This paper presents the design procedures implemented in a power line sensor in order to make it compatible with the electromagnetic environment, especially to the stresses imposed by lightning flashes. The paper includes the sensor description and simulation results of lightning surges coupled to the device by its external interfaces. It is shown that the protection of the radiofrequency circuitry requires the installation of a high-pass filter at the antenna port and that the protection of the voltage-measuring circuit can be accomplished by using a voltage divider combined with low-pass filter. By its turn, the protection of the current-measuring circuit is achieved by the installation of surge protective components.

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“…Estos dispositivos, al ser sometidos a campos electromagnéticos, se ven afectados por corrientes parásitas cuyo origen se debe a la inducción de ondas electromagnéticas producidas por señales eléctricas de radio y telecomunicaciones; los dispositivos electrónicos más susceptibles ante la presencia de campos electromagnéticos son aquellos utilizados en sistemas de información, debido a que estos campos afectan la fiabilidad de transferencia de datos entre los diferentes sistemas [1].…”

Section: Introductionunclassified

Estudio de blindaje magnético en materiales conductores en función de la frecuencia.

2016

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Se describe el efecto de un campo magnético uniforme en materiales conductores, y cómo estos apantallan el campo que los atraviesa. Con el fin de crear dicho campo,se energiza una bobina que encierra el material apantallador y la bobina sensor de campo magnético, mediante una señal sinusoidal producida por un generador de señales con una tensión de 10 [Vp]. La medida del campo magnético se realiza de manera indirecta ubicando una bobina como sensor en el centro de una bobina de diámetro mayor, realizando la medida de tensión en el sensor, de tal manera que al colocar un material apantallador que encierre la bobina se reduzca el campo magnético en su interior y, por ende, la tensión inducida en la bobina. Los materiales apantalladores que se emplearon fueron: acero, aluminio, hierro y cobre, la eficiencia de estos materiales fue estudiada en un rango de frecuencias de 60-100.000 Hz, obteniendo como resultado que el material más eficiente desde 60- 12.000 Hz es el hierro, y para 32.000-100.000 es el cobre.

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Protection of telecommunication equipment from nearby lightning magnetic field

Cited by 3 publications

References 2 publications

Lightning protection of a smart grid sensor

Lightning protection of a smart grid sensor

Lightning protection of a smart grid sensor

Estudio de blindaje magnético en materiales conductores en función de la frecuencia.

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