O2

4" 2-wire single-phase oil-cooled motors (1x220-230V / 50Hz)

Electric motors from series O2 are 2 pole asynchronous single-phase submersible motors, designed to operate coupled to ZDS 4” hydraulic parts. Strong and reliable, they are made of materials suitable for contact with water and oil-cooled by FDA - Food Drug Administration approved dielectric fluid. O2 motors are equipped with a special and unique start and run capacitor, which is designed
to guarantee a long-life to the motor and avoid the installation of an external control panel. They also come with a special and manually resettable built-in thermal protection, which stops the motor when overheated. Supply cable connector is removable for quick and easy maintenance.
 
APPLICATIONS
O2 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. O2 motors can be installed with a frequency inverter.
 
CHARACTERISTICS OF CONSTRUCTION
  • 2 pole asynchronous 2-wire single-phase oil-cooled motor.
  • Special and long lasting integrated start and run capacitor.
  • 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 - 1,5
  • 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
  • Maximum quantity of suspended sand: 600 g/m3
  • Rated ambient temperature: max 40° C
  • Cooling flow: min 8 cm/sec
  • Maximum starts/h: 150, equally distributed
  • Mounting: vertical/horizontal
  • Maximum immersion depth: 100 m
  • Allowed range of water pH: 6,4 - 8,0
  • Thrust: 1.500 N, 2.500 N (according to ranges)

Automatic protections

Thermal protection

Thermal protection

The built in thermal protection system stops the O2 motor when overheated. This can happen because of: the high temperature of the pumped liquid; when the minimum distance between the pump installed and the well bottom isn’t respected; when the pump is installed in well/tanks bigger than 4” without a proper cooling system; when the pump works in shut-off.

Current overload protection

Current overload protection

In case the pump is partially o totally blocked, the O2 motor is protected against overload.

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.
  • In order to reset the thermal protection, disconnect the pump power, wait that the correct working temperature parameters are restored, then plug it in again.

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