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EN 60742 (CLASSIFICAZIONE CEI 96-2)

The norm is applied to isolating transformers and air cooling safety transformers single-phase and multiple-phase, with nominal voltage not superior to 1000V in alternate current, of nominal frequency not superior to 500Hz and nominal power not superior to:

for isolating transformers
  • 25 kVA if single -phase
  • 40 kVA if multiple- phase
per trasformatori di sicurezza:
  • 10 kVA if single -phase
  • 16 kVA if multiple- phase
Nominal secondary voltage and vacuum secondary voltage must not be superior to:
 
for safety transformers:
  • 1000V in alternate current
  • 1000V √2V in not plate direct current
for isolating transformers:
  • 50V in alternate current
  • 120V in plate direct current among conductors or among a whatever conductor and the earth.
CLASSIFICAZIONE   APPLICAZIONE
EN 61558-2-2
EN 61558-2-4
EN 61558-2-6
EN 61558-2-13
EN 61558-2-15
Control Transformers for the working of apparels
Isolating Transformers
Safety Transformers
Autotransformers
Electromedical Transformer
 
BELELLI di Belelli G. & Co. 60020 Castelferretti (AN) – Tel. 071 9188626 – Fax 071 9188163 Partita IVA 02046120420