Open construction and ventilation ports allow cooling air to circulate freely around the windings. The ports are designed to prevent liquid drops or airborne solid particles from entering the housing when introduced at angles from 0° to 15° from vertical.
Guarded motor construction includes structural components including but not limited to screens, baffles, grills, expanded metal, or other means that prevents accidental contact with hazardous parts the likes of live metal or rotating parts. Semi-Guarded motors provide guarded motor construction, as described above, but limited usually to the top half of the motor. In Continental horizontal motors, the minimum motor enclosure provided is Drip Proof Guarded. In Continental vertical motors, the minimum motor enclosure provided is Weather Protected Type I.
Open construction and ventilation ports allow cooling air to circulate freely around the windings. The ports are designed to prevent liquid drops or airborne solid particles from entering the housing when introduced at any angle greater than 60 degrees downward from vertical. The motor is protected against solid objects greater than 1.968 inches, (50 mm).
Weather Protected Type I motors are identical to drip proof motors. In addition, a 3/4″ mesh screen completely covers the ventilators. This protects the motor by preventing the entry of rodents and reptiles, twigs, leaves and other potentially harmful material, while also minimizing the entry of snow and rain. All parts of the motor, both external and internal, are treated with corrosion inhibitors, and insulated with moisture-resistant CECO-Seal.
Improved ventilation, insulation and sealing systems allow Weather-Protected II motors to be used in areas previously reserved for totally enclosed, fan cooled motors. Ambient air, drawn into the motor by a circumferentially-screened frame opening, is directed upward at velocities of 600 ft/min or lower. When specified, the air is filtered to remove any particulates.
A portion of the air passes the shaft and cools the thrust bearing, then turns downward to cool the top half of the motor. The remaining air is directed to the bottom of the assembly, and is used to cool the motor’s lower half. Heated air exits through baffled openings in the lower frame.
Both air passages – for the upper portions of the motor and for the lower – contain at least three abrupt changes in direction. This reduces the possibility of dirt or moisture from entering the fans and windings. Storm winds pass through the external air passages, and are prevented from entering the motor’s active area. WPI is standard for Continental Vertical Ratings. WP I & II is additional for Continental Horizontal Ratings. WPII is additional for Continental Vertical Ratings.
Totally Enclosed construction prevents the exchange of air between the inside and outside of the motor case, yet is not air-tight and dust does not enter in sufficient quantity to interfere with satisfactory operation of the motor.
Totally Enclosed Fan-Cooled construction includes internal and external fans integral to the motor.
A Totally Enclosed Non-Ventilated motor is constructed and equipped for cooling by free convection.
Totally Enclosed Air-to-Air Cooled (TEAAC) construction utilizes an external air-to-air heat exchanger to provide cooling. Typically, separate fixed speed fans are used to circulate internal motor air through the heat exchanger and force external ambient air through the heat exchanger. This approach provides maximum cooling efficiency particularly on slow speed ratings and also reduces the rotating mass allowing for improved balance and longer motor life.
Totally Enclosed Air-to-Water Cooled (TEAWC) construction utilizes an external air-to-water heat exchanger to provide cooling. Typically a separate fan is used to circulate internal motor air through the heat exchanger. Water is supplied to the heat exchanger through separate customer controlled systems. This approach provides maximum cooling efficiency particularly on slow speed ratings and also reduces the rotating mass allowing for improved balance and longer motor life.
For more than 40 years, Continental Electric has been the world’s foremost manufacturer of Stirrer Motors (Reactor Motors) for the Low Density Polyethylene (LDPE) market.With motors ranging from 75HP to 500HP in a wide range of custom speeds, Continental offers a flexible solution for replacements motors,expansions of existing facilities and also new LDPE projects.
Although each environment is unique, our motors last for decades with minimal down-time.
For years, Continental Electric Motors has designed and manufactured motors for US Navy “Service A” applications. The motors conform to the latest version of Mil-M-17060. Continental’s, superior engineering, attention to detail, and outstanding quality have consistently proven Continental as a leader in electric motor manufacturing.
Continental Fire Pump Motors come with all the standard features that make Continental motors the choice for those whose lives depend on the reliability of the motor. All cast iron construction, Class B rise, 1.15 Service Factor, VPI insulation, NEMA 4 conduit boxes, superior corrosion resistant protective coatings, and an industry leading 36 month in service warranty.
Continental in conjunction with our partners wanted a unique motor that could service the waste-water industry without having the need to be submerged 100% of the time. These motors are designed to be used in dry-pit applications where there is a possibility of flooding.
At it’s core an Immersible Motor is a modified TEFC motor using a blower fan for air cooling. While in the flooded condition the blower motor is disengaged and the motor takes advantage of the vastly superior heat transfer characteristics of the surrounding media.
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