... installations against fire hazard due to insulation faults.Residual current circuit breakers are used in housing,tertiary sector and ... according to the formula IΔn <50/R,to provide protection against indirect contacts;300mA-protection against indirect contacts,as ... ,40,63,80ALeakage acting Current30mA,100mA,300mARated leskage nonoperating current(mA)15mA,50mA,150mA,250mABreaking time≤0.1SInm shell ...