Medium Voltage

From the know-how acquired in more than 30 years of work in the field of medium voltage, the range of current and voltage transformers for electrical measurements and protections is born.

The COL Group offer ranges from the production of classic voltage and current transformers, based on the CEI EN 60044-1 and CEI EN 60044 standards, to the more modern one of detection units compliant with the new standards for combined dictated by the CEI standard. EN 60044-3 (sensors).

• The company’s flagship products include:
  Self-protected voltage transformer (capable of self-disconnecting from the grid following a fault on itself) for auxiliary services compliant with Enel DY558 specification for both internal and external applications. It is an armored transformer that is applied to supply auxiliary voltage in secondary substations, or applied in overhead lines to power the motorization of pole equipment (GSCM003).
• Voltage transformer for auxiliary services compliant with the Enel GSCT003 specification for external applications. It is an armored transformer that is applied to power the motorization of the pole equipment (GSCM003).
• Voltage transformer compliant with Enel DMI031015 specification for user measurements. It is a voltage transformer that is applied to carry out voltage measurements on the user side.
• Current transformer compliant with Enel DMI031052 specification for user measurements. It is a transformer for user-side current measurements. COMBICOL combined sensors compliant with CEI EN 60044-3 standards for protection. These combined sensors for voltage and current detection are widely used with RGDAT units for short circuit current detection
• COMBICOL combined sensors compliant with CEI EN 60044-3 standards for protection. These combined sensors for voltage and current detection are widely used with RGDAT units for short circuit current detection