4″ 3-Phase NBS4

Three phase 4″ submersible motors for use in wells with diameters equal to or greater than 4″.

Product advantages

• Stator in oil
• Cable material compliant with drinking water standards (with relative inspection)
• Sand protection and mechanical seal to allow for optimal operation even in the presence of sand in the well
• Excellent efficiency and low operating costs
• All motors are pre-filled with liquid and 100 % tested

Techincal Specifications

• Power range: 0.37 – 7.5 kW
• 4’’ NEMA flange
• Protection rating: IP68
• Number of starts per hour: max. 30
• Vertical and horizontal operation (prior authorisation).
• Rated voltage: 210-220-230 V/50 Hz; 380-415 V/50 Hz; 460 V/60 Hz
• Voltage tolerance: ± 10 %
• Motor protection: thermal relays in compliance with EN 60947-4-1, trip class 10 or 10A, trip time < 10 s. at 5 x IN
• Insulation class: F
• Ambience temperature: 30 °C
• Cable dimensions: 4×1.5 mm2
• Cooling flow rate: min. 8 cm/sec.
• Water pH: 6.5-8
• Thrust load: 1500 N, 2500 N, 4500 N(K), 6500 N(K)