Built-in Low-temperature Startup Protection Module Eliminates Startup Obstacles for Pumps Serving Regions with Obvious Seasonal Temperature Differences Worldwide

Places with temperate continental climates and subtropical highland climates have obvious temperature gaps between winter and summer. Corrosive liquids such as inorganic salt solution and waste acid will rise in viscosity when the temperature drops, increasing the rotation load of pump impellers during startup. Uncontrolled instantaneous startup current will trigger power supply overload protection, and long-term forced cold startup will lead to motor coil overheating aging and magnetic torque overload damage of magnetic transmission components.

The supporting low-temperature startup protection module has two core functions of delayed soft startup and auxiliary liquid preheating. Before the pump formal startup, the module supplies low-power heating to the liquid retention area inside the pump cavity to reduce medium viscosity; during the startup phase, the system adopts soft current rise mode to avoid instantaneous peak current impact on the motor. After the pump runs stably with normal load, the preheating function automatically stops working to avoid unnecessary electric energy consumption in the formal operation stage.

The protection module is designed in an external plug-and-play control box structure, which can be directly matched with existing fixed-speed and variable-frequency pump units without modifying the internal structure of pumps and motors. It is widely suitable for outdoor wastewater treatment pumps, open-air chemical liquid transfer pumps and skid-mounted mobile fluid equipment deployed in global seasonal climate changing zones. This auxiliary electrical protection configuration reduces the failure rate of pump startup in low-temperature seasons, extends the service life of electrical and transmission components, and reduces seasonal equipment maintenance workload for global factory operation departments.