文件编号
Doc.No.
海拔高度
Altitude
污染等级
Pollution degree
(6)温度降容 Temperature derating
壳架等级额定电流
Frame size
rated current
降容系数
Derating
Coefficient
1250A
1600A
注:当使用环境温度低于 50℃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 derating
(7)海拔降容 Altitude derating
当海拔高度高于 2000m 需要降容。
Altitude of service conditions more than 2000m, derating is necessary.
海拔高度 H
额定工作电流 Rated
Altitude (km)
working current
2
2.5
3
3.5
4
4.5
5
5、接线 Wiring Method
NDT2920002
表 8-1:NDM3E 温度降容系数表
Table8-1: NDM3E temperature derating coefficient table
40℃
125A
1
250A
1
400A
1
630A
1
800A
1
1
1
表 8-2:NDM3E 海拔降容系数表
Table 8-2: Altitude derating coefficient table of NDM3E
In
In
0.980In
0.972In
0.963In
0.951In
0.938In
版次
第 5 版
Edition
V ersion5
consideration.
不超过 2000m
Lower than 2000m
3 级
Level 3
温度 temperature
45℃
50℃
1
1
1
1
1
1
1
1
1
1
1
1
1
1
最大工作电压
额定工频耐压 Rated
Ultimate
working frequency
working voltage
withstand voltage
Ue
Ue
0. 870Ue
0.846Ue
0.813Ue
0.781Ue
0.743Ue
26
实施日期
Implementation date
55℃
60℃
65℃
0.973
0.945
0.918
0.976
0.952
0.927
0.978
0.957
0.934
1
1
0.979
0.980
0.958
0.936
0.976
0.952
0.928
0.976
0.952
0.928
U
U
0.909U
0.858U
0.820U
0.784U
0.752U
20181213
70℃
0.891
0.902
0.911
0.957
0.913
0.903
0.903
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