1 Protection and control devices to normal operation. UF - Under frequency protection This frequency protection detects the reduction of network frequency above the adjustable threshold, generating an alarm or opening the circuit. OF - Overfrequency protection This frequency protection detects the increase of network frequency above the adjustable threshold, generating an alarm or opening the circuit. M - Thermal memory Thanks to this function, it is possible to take into account the heating of a component so that the tripping is the quicker the less time has elapsed since the last one. R - Protection against rotor blockage Function intervening as soon as conditions are detected, which could lead to the block of the rotor of the protected motor during operation. Iinst - Very fast instantaneous protection against short-circuit This particular protection function has the aim of maintaining the integrity of the circuit-breaker and of the plant in case of high currents requiring delays lower than those guaranteed by the protection against instantaneous short-circuit. This protection must be set exclusively by ABB SACE and cannot be excluded. Dual setting With this function it is possible to program two different sets of parameters (LSIG) and, through an external command, to switch from one set to the other. K - Load control Thanks to this function, it is possible to engage/disengage individual loads on the load side before the overload protection L trips.

1.保护和控制装置
恢复正常运行。
UF-欠频保护
该频率保护可检测网络频率低于
可调阈值，产生警报或打开电路。
过频保护
此频率保护检测网络频率高于
可调阈值，产生警报或打开电路。
M-热存储器
多亏了这个功能，才有可能考虑到空调的加热
使跳闸速度越快，此后经过的时间越短
后一个。
R-防止转子堵塞
一旦检测到情况，功能就会介入，这可能导致
运行期间受保护电机转子的阻塞。
Iinst-非常快速的瞬时短路保护
这种特殊的保护功能的目的是维护系统的完整性
断路器和装置，以防高电流要求更低延迟
而不是瞬时短路保护所保证的。这
保护必须由ABB SACE专门设置，不能排除。
双重设置
使用此功能，可以编程两组不同的参数（LSIG）
并通过外部命令从一组切换到另一组。
K-负载控制
由于该功能，可以接合/分离机器上的单个负载
过载保护L跳闸前的负载侧。