nader NDM3EU-400 Operating Instructions Manual page 9

文件编号
Doc. No.
to insulation.
（6）温度降容。
(6) Temperature de-rating.
断路器安装场所的环境要求如下表 4：
Environmental requirements for installation location of breaker are shown as follow Table 4:
Table 4 Environmental requirements for installation location of breaker
项目
Item
周围空气温度
Ambient air
temperature
相对湿度
Relative
humidity
海拔高度
Altitude
污染等级
Pollution
degree
温度降容系数见下表 5：
Temperature de-rating coefficient is shown as follow Table 5:
温度
Temperature
降容系数
De-rating
Coefficient
注：当使用环境温度低于 40℃时，产品可正常使用，不存在降容。
Notes：When ambient temperature is less than 40℃, breaker can be used normally without any
de-rating.
NDT2920257
Edition
表 4 断路器安装场所的环境要求
(在+40℃时)不超过 50%，最低温度湿月最不超过+25℃，且该月平均最大相
对湿度不超过 90%,并考虑因温度变化发生在产品表面上的凝露。
The relative humidity of the air does not exceed 50% (at +40℃), the lowest
temperature in the most humid month should not exceed +25℃, and the
highest humidity in this month should not exceed 90% while condensation
on breaker surface caused by temperature change should be taken into
表 5 温度降容系数
Table 5 Temperature de-rating coefficient
+40℃ +45℃
1 1
第 2 版
版次
Version 2
规范
Specifications
-35℃ ～ +70℃
consideration.
不超过 2000m
Lower than 2000m
3 级
Level 3
+50℃ +55℃
1 0.978
8
实施日期
Implementation date
+60℃ +65℃
2019.12.31
0.957 0.934
文件控制
2019-08-19
+70℃
0.911