This Standard specifies the steady state voltage limits in low voltage and medium voltage public electricity systems at the customer connection point.Electricity customers and equipment manufacturers can use limits of steady state supply voltages in combination with knowledge of voltage drop in customer installations to assess that range of steady state voltage levels that can be expected to be applied to electrical and electronic equipment under normal operating conditions.This Standard also recommends threshold limits for the detection of voltage dips and voltage swells. Although recommended voltage thresholds for voltage dips and voltage swells are contained in this Standard, no limits are set on voltage dip or voltage swell performance.