Submersible Pumps

Submersible pumps are centrifugal pumps installed under water. In fact they should be termed as “submersed motor” pumps because the pump is directly connected to an electric motor sited immediately below it and the motor is capable of running under water. As per modern practice, the windings are surrounded by water from the well or bore-hole so that water can act as a coolant and also as a bearing lubricant. In some models whole motor is sealed off from water. The motor is a squirrel cage. AC motor running at a fixed speed unless a variable speed frequency change is interposed on the line to change the speed. Power to the motor is fed by waterproof cables clipped to the side of the rising main. They can be easily and quickly installed and can be of small diameter.