The horizontal centre break disconnectors has a rated voltage that goes up to 420 kV. Minimum rated current is 200 up to 3150 amps. Manual and mechanized working systems could be given. Mechanical interlocks between principle circuits and earthing cutting edges are standard. All disconnectors are completely sort tested at labs like CPRI and ERDA in compliance to IEC 60129 and IEC 62271-102 norms.