The thermal nonreciprocity in sensingcoil is one of sources induced temperature drift in FOG , so the fiber loop is usually wound by quadrupole(QAD) symmetrical technique.
The protective relay is a sensing device, which senses the fault, determines its location and then send command to the proper circuit breaker by closing its trip coil.
保护继电器是一个传感装置，感官的过错，确定其位置，然后发送命令关闭其旅行线圈到正确的断路器。
3
The magnetizing mode in the step (2) is circumferential closed magnet yoke magnetization and coil magnetization full sensing.