This standard specifies the allowable deviation of the supply voltage. This standard is applicable to the deviation of the power supply voltage from the nominal system voltage of the AC 50Hz power system under normal operating conditions. This standard does not apply to transient and abnormal operating conditions.
GB/T 12325-2003 history
2008GB/T 12325-2008 Power quality.Deviation of supply voltage
2003GB/T 12325-2003 Power quality-Admissible deviation of supply voltage
1990GB 12325-1990 Quality of electric energy supply--Admissible deviation of supply voltage