GE SR469-P1-HI-A20-E 继电器模块 进口电气

GE SR469-P1-HI-A20-E 继电器模块 进口电气

GE SR469-P1-HI-A20-E 继电器模块 进口电气

电机冷却时间常数当469检测到电机正在运行时,在低于过载拾取设定点的负载下，或者电机停止，它将开始减速存储的TCU值，模拟实际电机冷却过程。

TCU呈指数衰减以冷却时间常数规定的速率设定值。通常是冷却过程停止的电机的速度比这慢得多运行中的电机，从而运行和停止提供了冷却时间常数设定值在继电器中反映差异。运行冷却的TCU下限曲线由热/冷安全失速比定义以及电机负载水平。

TCU下部停止冷却曲线的极限为0%，并且对应于环境温度下的电机。启动禁止和紧急重启启动抑制功能可防止热容量不足时的电动机可用或电机启动监控功能指令启动禁止。紧急情况下使用的热容量和电机启动可以重置监督计时器以允许热电机启动。

GE SR469-P1-HI-A20-E 继电器模块 进口电气

Motor cooling time constant When 469 detects that the motor is running, at a load below the overload pick set point, or the motor stops, it will start slowing down the stored TCU value, simulating the actual motor cooling process.

The TCU decays exponentially at a rate set by the cooling time constant. It is usually the cooling process that stops the motor at a much slower speed than this in the operation of the motor, thus running and stopping provides a cooling time constant set value that reflects the difference in the relay. The TCU lower limit curve for operating cooling is defined by the hot/cold safe stall ratio and the motor load level.

The limit of the lower TCU stop cooling curve is 0% and corresponds to the motor at ambient temperature. Start disable and emergency restart Start suppress functions prevent the motor from being available when the heat capacity is insufficient or the motor start monitoring function commands start disable. The heat capacity and motor start used in an emergency can reset the supervisory timer to allow the hot motor to start.