The Zez Silko CT and VT series are high-voltage instrument transformers that are suitable for use in measuring and protecting high-voltage distribution systems of 3.6kV up to 40.5kV. In addition, these transformers strictly complies in accordance with IEC 60044-1, IEC 60044-2, ČSN EN 60044-1, ČSN EN 60044-2, GOST 1983-89 and DIN 42600/1983 directives.