Description
This is a description of a W Series Motor, which is an eco-friendly wet type, water filled rewindable motor. The stator windings are of water proof synthetic film insulated copper winding wires. It features water lubricated thrust and journal bearings. The motor is pre-filled with clear, cold, pure, fresh, filtered water. However, on request motors can be pre-filled with water and propylene glycol (Anti-freeze agent) for places where the temperature is below the freezing conditions. Before commissioning, ensure the pre-filled level of water inside the motor. If any loss of volume is noticed, refill with clear, cold, pure, fresh, filtered water, through water filling plugs / valves provided in the upper housing.
The dynamically balanced rotors of these W series motors maintain uniform clearance thereby giving better efficiency and increase the life cycle of the water lubricated bush bearings. The unique design of thrust bearings creates a wedge of water between the shoe and the disc, and thereby providing better water lubrication and increases the life cycle of the thrust bearings. Pressure equalizing rubber diaphragm is provided to guard the pressure and volume variations of the water inside the motor. Motor sealing are made by means of O rings
4" Submersible Water Filled Rewindable Motors
Description
Motor power in kW
7.5
C.R.I. "W series" motors are deep well / bore hole rewindable submersible type, pre-filled with water, which acts as coolant and lubricant. These motors are available in single phase and three phase power supply. All single phase motors are thermally protected . Rotors are supported with bush and thrust bearings to withstand maximum axial and radial thrust loads. All mounting dimensions are in accordance with NEMA standards.
Specification
Nominal Diameter
4"
Series
Water Filled Rewindable Submersible Motors
Power Range kW
Single Phase : 0.37 2.2kW, Three Phase : 0.37 7.5kW ,* Single phase motors are thermally protected.
Speed
2900 rpm
Versions
Single Phase : 230V 50Hz, Three Phase : 380V -415V, 50Hz
Method of Starting
Single Phase Capacitor Star Capacitor Run (CSCR), Three Phase Direct On Line(DOL).
Maximum Down Thrust Load
0.37 1.5kW 3000N, 2.2 7.5 kW 6500N
Type of Duty
S1 (Continuous)
Degree of Protection
IP 58
Class of Insulation
Y
Max.Temperature of Liquid
30?C
Minimum Cooling Flow Along the Motor
0.5 m/sec
Starts per Hour
Single Phase 20 Times, Three Phase 12 Times
Available M.O.C
Type A & N
Features
High efficiency
Water lubricated rewindable motor
Thermal protection in single phase motors
Extremely hardwearing and water lubricated bearings
Corrosion resistant stainless steel motor body
Can be easily dismantled and repaired
Application
Residence
Agriculture
Gardens
Sprinkler systems
Fountains
Building services
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