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。
电流 | 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 |
N12 | TH-N12 | 注1 | TH-N12KP | 注1 | TH-N12SR | 注1 | - | - |
N18 | TH-N18 | - | TH-N18KP | - | - | - | - | - |
N20 | TH-N20 | TH-N20KP | TH-N20SR | TH-N20KPSR | ||||
N20TA | TH-N20TA | - | TH-N20 | - | TH-N20 | - | TH-N20 | - |
N60 | TH-N60 | TH-N60KP | TH-N60SR | TH-N60KPSR | ||||
N60TA | TH-N60TA | - | TH-N60 | - | TH-N60 | - | TH-N60 | - |
N120 | TH-N120 | TH-N120KP | TH-N120SR | TH-N120KPSR | ||||
N120TA | TH-N120TA | TH-N120 | TH-N120 | TH-N120 | TH-N120 | - | TH-N120 | - |
N220 | TH-N220RH | TH-N220HZ | TH-N220 | TH-N220 | TH-N220 | TH-N220 | TH-N220 | TH-N220 |
N400 | TH-N400RH | TH-N400HZ | TH-N400 | TH-N400 | TH-N400RHSR | TH-N400HZSR | TH-N400 | TH-N400 |
N600 | TH-N600 | TH-N600KP | TH-N600SR | TH-N600KPSR |