GB/T 156
ChinaAutoRegs｜GB/T 156-2017英文版/English/翻译/标准电压Standard Voltages
GB/T 156-2017英文版/English/翻译
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.
2.1
系统标称电压nominal system voltage
用以标志或识别系统电压的给定值。
注： 改写GB/T 2900.50-2008，定义601-01-21。
2.2
系统最高电压highest voltage of a system
系统正常运行的任何时间，系统中任何一点上所出现的最高运行电压值。
注： 瞬态过电压（例如由开关操作引起的）及不正常的暂态电压变化均不包括在内。
[GB/T 2900.50-2008，定义601-01-23 ]
2.3
系统最低电压lowest voltage of a system
系统正常运行的任何时间，系统中任何一点上所出现的最低运行电压值。
注： 瞬态过电压（例如由开关操作引起的）及不正常的暂态电压变化均不包括在内。
[GB/ T 2900.50-2008，定义601-01-24 ]
2.4
设备额定电压rated voltage( for equipment)
由制造商对一电气设备在规定的工作条件下所规定的电压。
注： 改写GB/T 2900.1- 2008，定义3.5.86 。
2.5
设备最高电压highest voltage for equipment
规定设备的最高电压是用以表示：
a) 绝缘；
b) 与设备最高电压相关联的其他性能。
注： 设备只能用于系统最高电压不高于其设备最高电压的系统中。