Sub TWU 3.03-03-HS-ECP-B | Wilo

Sub TWU 3.03-03-HS-ECP-B

Technical data
Tender text

Fully submersible, multistage submersible pump with radial impellers in sectional construction for vertical or horizontal installation, with built-in non-return valve.

Corrosion-free permanent magnet motor for direct starting for connection to the supplied frequency converter. Oil-filled motor with self-lubricating bearings, designed for high speeds up to 8400 rpm.

Operation with the frequency converter means the rotation speed of the unit is adapted to the current water requirements automatically. As a result, the submersible pump always delivers a constant pressure. 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 cooling, the frequency converter must be installed directly in the pipe outside the fluid (overflow-proof). 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 completely assembled
  • Frequency converter
  • Connection cable approved for drinking water
  • Installation and operating instructions
Operating data
Fluid media
Max. delivery head H
54 m
Pipe connection on the pressure side DNd
Rp 1
Maximum operating pressure p
40,0 bar
Max. sand content
50 g/m³
Protection class motor
Max. immersion depth
150 m
Min. fluid temperature Tmin
3 °C
Max. fluid temperature Tmax
35 °C
Net weight, approx. m
4 kg
Motor data
Mains connection
1~230 V, 50/60 Hz
Rated power P2
0,6 kW
Rated speed n
8400 1/min
Rated current IN
8,3 A
Activation type
Direct online (DOL)
Max. switching frequency t
30 1/h
Motor diameter DM
76 mm
Min. flow rate at the motor m/s
0,08 m/s
Connection cable length
1,8 m
Cable cross-section
4G1,5 mm²
Pump housing
Stainless steel
Motor housing
Stainless steel
Stainless steel
Information for order placements
Net weight, approx. m
4 kg
Product description
Sub TWU 3.03-03-HS-ECP-B
Article number

Certificate REACH (Documents)

REACH regulation

Edition 2020-08
Page format 209.9 x 297.0 mm
Number of pages 2
PDF (158 KB)


Number of pages
DWG (70 KB)


Number of pages
STP (83 KB)


DWG (16 KB)


Number of pages
DWG (17 KB)


Number of pages
DWG (16 KB)