TH-N系列热继电器热继电器主要用于交流频率50Hz和60Hz，额定电压至690V，额定电流至800A的电力系统中，作为三相交流电动机的过载保护和断相保护。延迟型（带饱和电抗器）特别适用于起动时间长的电动机负载。热过载继电器与上级保护的塑壳断路器可以轻松实现协调保护。产品型号电流等级标准（2热动元件）3热动元件延迟型（带饱和电抗器）过载保护过载、断相保护过载保护过载、断相保护起动器用单独安装起动器用单独安装起动器用单独安装起动器用单独安装N12TH-N12注1TH-N12KP注1TH-N12SR注1－－N18TH-N18－TH-N18KP－－－－－N20TH-N20TH-N20KPTH-N20SRTH-N20KPSRN20TATH-N20TA－TH-N20TAKP－TH-N20TASR－TH-N20TAKPSR－N60TH-N60TH-N60KPTH-N60SRTH-N60KPSRN60TATH-N60TA－TH-N60TAKP－TH-N60TASR－TH-N60TAKPSR－N120TH-N120TH-N120KPTH-N120SRTH-N120KPSRN120TATH-N120TATH-N120TAHZTH-N120TAKPTH-N120TAHZKPTH-N120TASR－TH-N120TAKPSR－N220TH-N220RHTH-N220HZTH-N220RHKPTH-N220HZKPTH-N220RHSRTH-N220HZSRTH-N220RHKPSRTH-N220HZKPSRN400TH-N400RHTH-N400HZTH-N400RHKPTH-N400HZKPTH-N400RHSRTH-N400HZSRTH-N400RHKPSRTH-N400HZKPSRN600TH-N600TH-N600KPTH-N600SRTH-N600KPSR工作条件1.环境温度：标准为20℃,-10~+40℃(无凝露、无结冰)2.海拔高度：不超过2000m；3.相对湿度：45%~85%RH；4.大气情况：应无会引起爆炸危险的介质，也无会腐蚀金属和破坏绝缘的有害气体和导电尘埃；5.冲击：10~55Hz19.6m/s2以下；6.振动：49.0m/s2以下；7.保管温度:-30~+65℃。