This part of IEC 60076 applies to high-voltage/low-voltage self-protected liquid-filled and
naturally cooled transformers for rated power 50 kVA to 1 000 kVA for indoor or outdoor use
having a
– primary winding (high-voltage) with highest voltage for equipment up to 24 kV;
– secondary winding (low-voltage) with highest voltage for equipment of 1,1 kV.
These transformers are equipped with a self-protection and disconnection device to protect
the environment, property and people and prevent any disturbance of the high-voltage
network from the consequences of an internal transformer fault.
Transformers covered by this standard comply with the relevant requirements prescribed in
the IEC 60076 series.
The self-protected transformer may be used in conjunction with other devices to provide
system coordination and sensitive system protection. The protection system is not designed
to be functional when the power supply is from the low-voltage side. The self-protected
transformer is not intended to function in parallel with another transformer.
NOTE This standard may be applied to transformers with a higher voltage than 24 kV or other rated power by
agreement between the manufacturer and the purchaser. Validation tests should be carried out at the appropriate
level.
IEC 60076-13:2006 history
2006IEC 60076-13:2006 Power transformers - Part 13: Self-protected liquid-filled transformers