4M

The 4" SM series submersible motors are rewindable, like their predecessors, and can operate in wells with water temperatures no higher than 35°C and a pH between 6.5 and 8.0. The filling liquid is a dielectric fluid called white oil, approved by the American FDA and other pharmacological institutions worldwide. The coupling dimensions and flange comply with NEMA standards as these submersible motors are specifically designed to operate in conjunction with submersible pumps (in deep wells) with the same coupling dimensions.

Power supply can be single-phase or three-phase. Single-phase models range from 0.37 kW (0.5 HP) to 4.0 kW (5.5 HP), while three-phase models range from 0.37 kW (HP) to 7.5 kW (10 HP). Submersible motors are typically used in vertical installations. However, they can be installed horizontally, subject to prior approval from our technical department and a comprehensive assessment of the required application. The motors can be installed in 4" wells with a maximum depth of 250 meters.


Their rewindability is ensured by a design that facilitates the disassembly and reassembly of the motors themselves.


APPLICATIONS:


The 4" electric motors ensure reliable operation in wells with a diameter of 4" or greater. Oil-lubricated axial and radial bearings allow for maintenance-free operation. Pressure compensation within the motor is ensured by a special diaphragm.


ADVANTAGES :


  • stator in oil;
  • cable material compliant with drinking water standards (with related testing);
  • sand protection and mechanical seal to allow excellent operation in the presence of sand in the well;
  • excellent efficiency with low operating costs;
  • All motors are pre-filled with liquid and 100% tested.


STANDARD ENGINES:


  • 0,37 - 7,5 kW;
  • NEMA 4” flange;
  • Protection: IP68;
  • Number of starts per hour: max. 30;
  • Vertical and horizontal operation (only if approved);
  • Rated voltage: 210-220-230/50Hz / 380-415V/50Hz / 460V/60Hz;
  • Voltage tolerance: 10%;
  • Motor protection: real thermal selection according to EN60947-4-1 standards, trip class 10 or 10A, trip time < 10 s. at 5 x IN;
  • Insulation: class F;
  • Ambient temperature: 30°C;
  • Cable size: 4 x 1.5 mm2;
  • Min. cooling flow 8 cm/sec.
  • pH water:6.5-8;
  • Axial load:1500 N, 2500 N, 4500 N(K), 6500 N(K).



6M

Series of 6", 8", and 10" rewindable water-filled submersible motors, asynchronous 2-pole motors with squirrel-cage rotors. PVC-filled wire windings are easily rewindable. Robust and oversized motors designed to withstand heavy loads and last a long time.

The radial bearings and thrust bearing are Mitchell products and are lubricated by the motor's internal water; this allows for long, maintenance-free operation. The mechanical seal mounted on the crankshaft provides exceptional resistance to sand.


CHARACTERISTICS :


  • Wet wire winding in PVC (PE2 PA on request);
  • Stainless steel outer jacket and bottom cover;
  • Upper support and lower support in G25 cast iron;
  • Upper and lower radial bearings in graphite;
  • Graphite axial bearing - AISI 303;
  • Mechanical seal in SiC - NBR - AISI304;
  • Non-toxic filling liquid: water glycol;
  • Parasabbia in NBR - AISI304;
  • Motor insulation class Y/B - IP 68 protection;
  • Shaft projection and coupling dimensions to NEMA standards;
  • Easily disassembled and retracted;
  • Possibility of Y/A star delta starting.


LIMITS OF USE:


  • Maximum number of starts allowed per hour: 20 (6MA - 10MA) - 7 (8MA);
  • Axial thrust: 15500N from 5.5 to 25 hp (6MA) / 20000N from 30 to 35 hp (6MA) / 25000N from 40 hp (6MA) /27500N from 50 to 60 hp (6MA);
  • Axial thrust: 45000N from 30 to 150 hp (8MA);
  • Axial thrust: 60000N from 125 to 200 hp (10MA);
  • Maximum diving depth: 150 m (6MA);
  • Maximum diving depth: 100 m (8MA - 10MA);
  • Minimum water flow: 0.30 m/s (6MA);
  • Minimum water flow: 0.50 m/s (8MA - 10MA).