
Submersible Motors

Submersible motors are a type of motor designed specifically for underwater applications. They are designed to operate in the presence of water, and are typically used to power pumps, fans, and other underwater equipment. Submersible motors are usually constructed out of corrosion-resistant materials, such as stainless steel or other non-ferrous alloys, to ensure longevity and operation in saltwater or highly corrosive environments. Submersible motors also have an open-wound design, which allows them to handle high-pressure liquids and gases, as well as deep-water applications. They are also more efficient than traditional motors, and can operate at much higher speeds than conventional motors. In addition, submersible motors are available in a variety of sizes and power capacities, allowing for the efficient powering of a wide range of underwater equipment.
Baldor-Reliance Submersible motors are designed for both wet and dry pit applications. Wet pit motors use the effluent for cooling and can run 15 minutes in air. Dry pit motors are designed to run continuously in air or submerged. These motors are ideally suited for the municipal and industrial waste water industries and can be found powering slurry pumps, aerators and mixers.
Products
Motor starters safely start and stop a motor in industrial applications. They are designed with a contactor, overload and circuit protection. They are used when basic motor control is required, where torque on the motor is not a concern and speed control is not needed. Theadvantages of motor starters include: lower cost, allows for remote operation, allows for monitoring of motor state (with the use of auxiliary contacts) and they are safe and efficient. The disadvantages include: high inrush current that can cause fuses to blow and breakers to trip if the inrush is too high, and the starter will allow a full torque to start the motor which can cause the motor to ramp up to full speed very quickly potentially causing the motor to wear and degrade prematurely.
Soft starters protect motors from inrush current by gently ramping up the motor to full speed. They provide all of the same functions as a traditional motor starter. The advantages of soft starters include: they are less expensive than a VFD when only startup control is needed, they are a smaller system than a VFD where space is a concern and they prevent unwanted torque upon startup, prolonging the life of the motor. The disadvantages include: they are more expensive than a traditional motor starter and they do not allow for full speed control.
Variable Frequency Drives (VFDs) allow for the slow ramp up of a motor during startup and the slowing down of the motor during shutdown. They also allow for full speed control during the entire run cycle of the motor. VFDs provide the same functions as both the traditional motor starters and soft starters. The advantages of VFDs include: full speed control (start, stop and in-between), more custom control and monitoring, energy savings due to efficient motor usage and less wear and tear on the motors. The disadvantages include: they are more expensive and larger than other motor control options and they generate heat that may require fans or AC units.