O3

4" single-phase oil-cooled PSC motor (1x220-230V / 50Hz)

Electric motors from series O3 are 2 pole asynchronous single-phase submersible motors designed to operate coupled to hydraulic parts with 4” Nema standard. Strong and reliable, they are made of materials suitable for contact with water and oil-cooled by FDA - Food Drug Administration approved dielectric fluid. O3 motors require a start and run control panel, that has to include capacitor and manual reset amperometric protection. The supply cable connector is removable for quick and easy maintenance.
 
APPLICATIONS
O3 oil-cooled motors ensure reliable working in 4” or larger diameter wells and are designed to be used for lifting, distribution, and pressurisation of water in water systems. O3 motors can be installed with a frequency inverter.
 
CHARACTERISTICS OF CONSTRUCTION
  • 2 pole asynchronous single-phase PSC oil-cooled motor.
  • Rewindable stator and rotor immersed in dielectric fluid (FDA approved).
  • Oversized axial and radial oil-lubricated bearings to guarantee longer life to the motor.
  • The pressure compensation inside the motor is ensured by a special internal diaphragm.
  • Sand protection to guarantee optimal operation even with sand in the borehole.
  • Motor bottom cover for extra protection and safety.
  • Removable lead connector to make installation and maintenance easier.
  • Supply cable according to drinking water regulations (ACS), available in different lenghts.

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  • kW: 0,37 - 2,2
  • Voltage range: 1x220-230V / 50Hz
  • Flange: 4" NEMA standard dimensions
  • Voltage tolerance 50Hz from nominal: +6% / -10% Un
  • Rotation: ccw, facing shaft end
  • Degree of protection: IP 68
  • Insulation: F
  • Rated ambient temperature: max 40° C
  • Maximum quantity of suspended sand: 600 g/m3
  • Cooling flow: min 8 cm/sec
  • Maximum starts/h: 150, equally distributed
  • Mounting: vertical/horizontal
  • Maximum immersion depth: 150 m
  • Allowed range of water pH: 6,4 - 8,0
  • Thrust: 1.500 N, 2.500N, 4500 N (according to ranges)
  • Protection requirements: For O3 motors without the control box CBO an overload protection and a control unit for motor start and run must be installed according to EN 60947-4-1 trip time < 10 sec. at 5xIn.

Information on a proper installation

  • Before installation, it is necessary to verify technical requirements of the given hydraulic part (thrust, power) to select the correct motor.
  • If you are using a generator with an internal combustion engine, it is necessary that the generator’s power measured in kW (in continuous delivery) is three times the rated power in kW of the submersible pump.
  • We recommend to install a proper cooling jacket in installations bigger than 10 cm, to guarantee the correct motor cooling flow.
  • The maximum quantity of sand allowed in the pumped water is 120 g/m³.

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