1.0Nishihttps://nishi.com.br/novo/en/adminhttps://nishi.com.br/novo/en/author/admin/INSULATION SYSTEM - COILS - Nishirich600338<blockquote class="wp-embedded-content" data-secret="gCUKHCZwjO"><a href="https://nishi.com.br/novo/en/insulation-system-coils/">INSULATION SYSTEM – COILS</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://nishi.com.br/novo/en/insulation-system-coils/embed/#?secret=gCUKHCZwjO" width="600" height="338" title="“INSULATION SYSTEM – COILS” — Nishi" data-secret="gCUKHCZwjO" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript">
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https://nishi.com.br/novo/wp-content/uploads/2021/06/sistema-isolacao-bobinas.jpg887541This subject is very important for users of large motors and generators. In machines with voltage higher than 6 kV, operating at the frequency of the electrical system (50 or 60 Hz), the coils (market standard) have a semi-conductive material (tape or paint) on the straight side in order to avoid partial discharges that deteriorate the insulating system. The fit between coil and slot is never perfect and we always have small voids in this contact. In this situation, we have electrically a circuit with 2 (two) capacitors connected in series of different dielectric constants (air and insulating).