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自动转换开关电器的正常使用环境条件—人民电器为您讲解

2013/12/3 11:16:47      点击:
1 周围空气温度:+ 40℃ ~ -5℃(UL在其它标准内有规定)。
2 海拔院不超过2 000m。
3大气条件:
①湿度。最高温度为+40℃时,空气的相对湿度不超过50%,在较低的温度下可以允许有较高的相对湿度,例如20℃时达90%(日;肪常。
②污染等级:污染等级2 (家用及类似用);
污染等级3 (工业级)。
工业用电器一般适用于污染等级3的环境。
4 过电压类别(安装类别):IV——电源水平(进线端),III——配电水平,II——负载水平(控制电器)。
5 电磁环境:环境A (非公共电网,有较高骚扰源),环境B(公共电网,无较高骚扰源)。
选用的基本原则如下[1]
1 选型时需特别注意的指标有:CB 级ATSE 的额定短路接通与分断能力。
2 原则上ATS 自动转换开关电器不作为短路;さ缙魇褂,只作为电源自动转换开关使用。
3 ATSE 的额定电流应大于或等于其上级空气断路器的整定电流。
4 根据每路电源的性质及不同用途确定投切方式:自投自复、自投不自复。
5 根据每路电源的性质指定优先电源、不指定优先电源;并确定相关功能如过欠电压检测、频率检测、缺相检测、通讯接口、电气机械互锁、连续可调的延时转换等,可实现自动、远程、紧急手动控制等。
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