请问当用空气开关，交流接触器、热继电器控制电动机时，空气开关、交流接触器的额定电流如何选择？

Question

热继电器的整定值如何选择，说明具体理由，谢谢！
包括熔断器额定电流的选择多少？

Answer 1

我们现在一般通用的是正泰和施耐德的！
正泰的配置：
电机功率 接触器型号 热继电器型号 空开型号
0.37KW CJX2-0910 NR2-1A DZ47-60-3P/10A
0.55KW CJX2-0910 NR2-1.6A DZ47-60-3P/10A
0.75KW CJX2-0910 NR2-2.5A DZ47-60-3P/10A
1.1KW CJX2-0910 NR2-4A DZ47-60-3P/10A
1.5KW CJX2-0910 NR2-4A DZ47-60-3P/10A
2.2KW CJX2-0910 NR2-6A DZ47-60-3P/10A
3KW CJX2-0910 NR2-10A DZ47-60-3P/10A
4KW cJX2-1210 NR2-13A DZ47-60-3P/16A
5.5KW CJX2-1810 NR2-18A DZ47-60-3P/20A
7.5KW CJX2-2510 NR2-25A DZ47-60-3P/25A
11KW CJX2-3210 NR2-32A DZ47-60-3P/32A
15KW CJX2-4011 NR2-40A DZ47-60-3P/60A
18.5KW CJX2-5011 NR2-50A NM1-100H/3300/100A
22KW CJX2-6510 NR2-65A NM1-100H/3300/100A
30KW CJX2-8011 NR2-80A NM1-100H/3300/100A
37KW CJX2-9511 NR2-93A NM1-100H/3300/125A
45KW CJX2-14011 NR2-120A NM1-100H/3300/160A
55KW CJX2-17011 NR2-150A NM1-100H/3300/180A
75KW CJX2-25011 NR2-250A NM1-100H/3300/225A
90KW CJX2-30011 NR2-315A NM1-100H/3300/315A
施耐德的配置，功率同上：
接触器型号 热继电器型号 空开型号
LC1D0610*7N LRD-05C 1A C65-3P/6A
LC1D0610*7N LRD-05C 1A C65-3P/6A
LC1D0610*7N LRD-06C 1.6A C65-3P/6A
LC1D0610*7N LRD-07C 2.5A C65-3P/6A
LC1D0610*7N LRD-08C 4A C65-3P/6A
LC1D0610*7N LRD-010C 6A C65-3P/6A
LC1D0910*7N LRD-012C 8A C65-3P/10A
LC1D0910*7N LRD-014C 10A C65-3P/16A
LC1D1210*7N LRD-016C 13A C65-3P/16A
LC1D1810*7N LRD-021C 18A C65-3P/25A
LC1D2510*7N LRD-022C 24A C65-3P/25A
LC1D3210*7C LRD-032C 32A C65-3P/40A
LC1D4010*7C LRD-035C 38A C65-3P/60A
LC1D5010*7C LRD-3357C 50A C65-3P/60A
LC1D8010*7C LRD-3361C 70A NSC100S-100A
LC1D9510*7C LRD-3363C 80A NSC100S-100A
LC1DI 1500*7C LRD-4365 104A NSC160S-125A
LC1DI 1700*7C LRD-4365 140A NSC160S-160A
LC1D205*7C R9F5371 220A NSC250S-225A
LC1D245*7C R9F7371 250A NSC250S-250A
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Answer 2

2KW的电机选D5A或C6A的断路器，0910的接触器，4-8A可调的热继电器，这些东西上面都有说明。断路器根据电流选就行D的小点C的大点就行。如果要求不高10KW以下的电机就选C32A就行。本回答被网友采纳

Answer 3

都是电机额定电流的0.95-1.05倍就可以了

Answer 4

热继电器交流接触器熔断器用电机额定电流 空气开关大一点就行