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CEI EN 62535

CEI Classification: 10-46

Liquidi isolanti - Metodo per la determinazione dello zolfo potenzialmente corrosivo in oli isolanti nuovi e usati
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CEI
CEI
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Publication Date: 2009-08
ValidFrom: 2009-10
Language: EN
Pages: 24
Issue Num.:  9929 E
Commitee: CEI-CT10
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La presente Norma fornisce un metodo per la determinazione dello zolfo potenzialmente corrosivo eventualmente presente in oli dielettrici usati e nuovi.

Guasti recenti verificatisi a carico di trasformatori e reattori elettrici a causa della presenza di zolfo corrosivo negli oli isolanti sono stati causati dalla formazione di un deposito di solfuro di rame sulla superficie della carta che avvolge i conduttori di rame. La crescita di solfuro di rame sui conduttori di rame metallico può causare la formazione di particolato all’interno dell’olio, che agisce come punto di innesco per scariche elettriche conducendo quindi a guasti.

Il metodo proposto fa pertanto uso di un conduttore di rame avvolto da uno strato di carta immerso in olio riscaldato, del quale si valuta la capacità di produrre solfuro di rame e trasferirlo allo strato di carta.
Questa Norma viene pubblicata dal CEI nella sola lingua inglese in quanto particolarmente mirata a settori specialistici.
La presente Norma recepisce il testo originale inglese della Pubblicazione IEC.

See also

IEC 62535:2008
EN 62535:2009

International Coding Standard (ICS)

29.040.10
Insulating oils

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International Classification for Standards (ICS) is an international classification system for technical standards.

The ICS is a hierarchical classification organized on three levels.

Level 1 covers the main fields of activity in standardization, e.g. road vehicle engineering, agriculture, metallurgy.

Each field has a two-digit notation, e.g.

  43    Road Vehicle Engineering

The main fields are subdivided into groups (level 2). The notation of a group consists of the field notation and a three-digit group number, separated by a point, e.g.

  43.040    Road vehicle systems

Some groups are further divided into sub-groups (level 3). The notation of a sub-group consists of the group notation and a two-digit number, separated by a point, e.g.

  43.040.20 Lighting, signaling and warning devices

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