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20 级产品脱扣曲线 Tripping characteristic curve of the class 20
4. 工作环境/ Working conditions
4.1 运行温度：-25℃~60℃。极限运行温度：-40℃~70℃,存储温度：-60℃~+80℃
Operating temperature: -25℃~60℃, extreme operating temperature: -40℃~70℃，Storage
temperature: -60℃~80℃
4.2 海拔条件：3000m, 5000m 需与制造厂协商
Altitude: The altitude of the installation site is under 3,000m. Negotiate with the manufacture
when the altitude is up to from 3000m to 5000m
4.3 污染等级
III 级Pollution level: 3
4.4 防护等级：
IP20 Protection grade: IP20
4.5 安装类别为 III
Installation Category: III
4.6 抗振性能： 5…300 Hz ,2gn
Anti-vibration performance: 5…300 Hz , 2gn
4.7 抗冲击性能： 1/2 正弦波 = 11ms，15gn
Shock t resistance: 1/2 sine wave = 11ms，15gn
