Fully submersible, multistage submersible pump with radial impellers in sectional construction for vertical or horizontal installation, with built-in non-return valve. Corrosion-free asynchronous motor with integrated frequency converter with a fixed speed of up to 8400 rpm for connection directly to the alternating current system. Rewindable oil-filled motor with self-lubricating bearings, designed for high speeds. The motor and the frequency converter are cooled by the fluid. Therefore, the unit must always be operated immersed. In cases of vertical installation, a cooling jacket must be provided depending on the diameter of the bore. In cases of horizontal installation, a cooling jacket must always be provided . For pumping water out of boreholes with a maximum immersion depth of 150 m and a max. sand content of 50 g/m³.

Scope of delivery:

• Hydraulics + motor fully installed
• Frequency converter
• Connecting cable approved for drinking water
• Installation and operating instructions

Operating data

• Fluid media
  Water
• Max. delivery head H
  6.77 m

Unit

• Pipe connection on the pressure side RPD
  Rp 1
• Maximum operating pressure p
  40 bar
• Protection class motor
  IP58
• Max. immersion depth
  15.00 m
• Min. fluid temperature T_min
  3 °C
• Max. fluid temperature T_max
  35 °C
• Net weight, approx. m
  10 kg

Motor data

• Mains connection
  1~230 V, 50/60 Hz
• Rated power P₂
  0.90 kW
• Rated speed n
  2900 rpm
• Rated current I_N
  12.00 A
• Activation type
  Direct online (DOL)
• Max. switching frequency t
  30 1/h
• Motor diameter Ø
  76.2 mm
• Min. flow rate at the motor m/s
  0.08 m/s

Materials

• Pump housing
  1.4301
• Motor housing
  1.4301
• Shaft
  1.4104
• Impeller
  PC

Information for order placements

• Net weight, approx. m
  10 kg
• Brand
  Wilo
• Product description
  Sub TWU 3-0303-HS-I
• Article number
  6064281