According to the recommendations of the IEC 60871-1 standard of 1997, Lifasa’s AT capacitors are able to withstand:
10% overvoltage (1.10 x Un) over the rated voltage 12 hours of every 24 hours.
30% current overload (1.3 x In) over the rated current in continuous operation.
The impregnating liquid used is SAS-40E / M/DBT (JARYLEC C101), a non-chlorinated biodegradable oil (without PCB’s), which has a high resistance to partial discharges and excellent working conditions as a dielectric, in addition to not presenting any type of risk to the environment in the event of failure.
The capacitors are equipped with internal discharge resistors in order to reduce the voltage, after being put out of service, from an initial peak voltage of 1,414 times the nominal voltage to a residual voltage of 75 V 10 minutes according to IEC 60871, or 50 V in 5 minutes according to RAT.