Cooler water leakage fault alarm device and main motor

The invention discloses a cooler water leakage fault alarm device and a main motor. The cooler water leakage fault alarm device comprises a water leakage detection cup and a water leakage detector. Afirst connecting flange is fixed at the inlet of the water leakage detection cup. A second connecting flange is fixed at the outlet of the water leakage detection cup. The first connecting flange is detachably connected to the cooling water leakage receiving tank of the main motor, and the second connecting flange is detachably connected with a drainage pipe. The water leakage detector is installed in the water leakage detection cup. The first connecting flange and the second connecting flange are arranged at the inlet and the outlet of the water leakage detection cup respectively so that thedetachable connection with the cooling water circulation pipeline is realized, and replacing of the water leakage detector is convenient. The inconvenience of replacing the water leakage detector caused by directly welding the