ChinaAutoRegs｜GB/T 156-2017 英文版/English/翻译/标准电压Standard Voltages
1 SCOPE
This Standard specifies standard voltage values which are intended to serve
as preferred values for the nominal voltage of power supply systems;
as reference values for equipment and system design.
This Standard applies to
AC transmission, distribution and utilization systems and equipment for use in such systems with a standard frequency of 50 Hz having a nominal voltage above 220 V;
AC and DC traction systems;
Equipment having a rated voltage below 120V and a standard frequency of 50Hz (but not exclusively), and equipment having a DC voltage below 1,500V; such equipment covers batteries (from primary or secondary cells), other power supply devices (AC or DC), electrical equipment (including industrial and communication), and appliances;
High voltage DC transmission system.
This Standard does not apply to voltages representing or transmitting signals or measured values.
This Standard does not apply to voltages of elements, components or parts used within electrical equipment.
Note 1: In this standard, AC voltage means the root mean square value (r.m.s.), while DC voltage is non-ripple direct voltage value.
Note 2: Test voltages, test conditions and acceptance criteria are required to be defined in the system and product standards.
2 TERMS AND DEFINITIONS
For the purpose of this standard, the following terms and definitions apply.
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