Detail publikace

Change of the thermal profile in the modern MCCB by the different electrical contact resistance

Originální název

Change of the thermal profile in the modern MCCB by the different electrical contact resistance

Anglický název

Change of the thermal profile in the modern MCCB by the different electrical contact resistance

Jazyk

en

Originální abstrakt

The paper deals with the change of temperature rise of the MCCB at the steady state. The critical parts under the study are main contacts and contact lever. The movable contact in focus is modern, rotoactive system which moves contact along a circular path and his material is harder than the fixed one. It causes sequential sag of the movable contact followed by a deformation of the fixed one. Consequently, the contact area between the pair of contacts is increasing, but the contact material is losing during the arc quenching. Rests and dirt layers appear on the contact surfaces and causes increase electric and thermal resistances between contacts. Temperature rise of the device with additive layers after arcing increases against new one at the steady state. The profile of the temperature rises are computed using finite volume method (FVM). The first part of the paper focuses on the calculation of the thermal losses of the electrical current path at rated current with the different electrical contact resistance.

Anglický abstrakt

The paper deals with the change of temperature rise of the MCCB at the steady state. The critical parts under the study are main contacts and contact lever. The movable contact in focus is modern, rotoactive system which moves contact along a circular path and his material is harder than the fixed one. It causes sequential sag of the movable contact followed by a deformation of the fixed one. Consequently, the contact area between the pair of contacts is increasing, but the contact material is losing during the arc quenching. Rests and dirt layers appear on the contact surfaces and causes increase electric and thermal resistances between contacts. Temperature rise of the device with additive layers after arcing increases against new one at the steady state. The profile of the temperature rises are computed using finite volume method (FVM). The first part of the paper focuses on the calculation of the thermal losses of the electrical current path at rated current with the different electrical contact resistance.

BibTex


@article{BUT117837,
  author="Lukáš {Dostál} and Petr {Dohnal} and Jiří {Valenta}",
  title="Change of the thermal profile in the modern MCCB by the different electrical contact resistance",
  annote="The paper deals with the change of temperature rise of the MCCB at the steady state. The critical parts under the study are main contacts and contact lever. The movable contact in focus is modern, rotoactive system which moves contact along a circular path and his material is harder than the fixed one. It causes sequential sag of the movable contact followed by a deformation of the fixed one. Consequently, the contact area between the pair of contacts is increasing, but the contact material is losing during the arc quenching. Rests and dirt layers appear on the contact surfaces and causes increase electric and thermal resistances between contacts. Temperature rise of the device with additive layers after arcing increases against new one at the steady state.
The profile of the temperature rises are computed using finite volume method (FVM). The first part of the paper focuses on the calculation of the thermal losses of the electrical current path at rated current with the different electrical contact resistance.
",
  chapter="117837",
  howpublished="print",
  number="3",
  volume="2",
  year="2015",
  month="september",
  pages="312--315",
  type="journal article in Scopus"
}