Transformers for tubular discharge lamps having a no-load output voltage exceeding 1000 V (generally called neon-transformers). General and safety requirements
Test methods specific to filling compounds of electric cables. Drop-point. Separation of oil. Lower temperature brittleness. Total acid number. Absence of corrosive components. Permittivity at temperature 23 C. D.c. resistivity at temperature 23 C and 100 C