Lowara 4OS submersible motor. Representative manufacturer family photograph.
Lowara 4OS submersible motor. Representative manufacturer family photograph.
Lowara 4OS motor construction sections showing smaller and larger motor designs. Manufacturer family reference diagram.
Lowara 4OS motor construction sections showing smaller and larger motor designs. Manufacturer family reference diagram.
Lowara 4OS submersible motor. Representative manufacturer family photograph.
Lowara 4OS motor construction sections showing smaller and larger motor designs. Manufacturer family reference diagram.

LOWARA 4OS05M/2W 0.55KW 220-240V SINGLE PHASE, TWO WIRE SUBMERSIBLE MOTOR

Lowara 4OS05M/2W is a 0.55kW replacement motor for Lowara GS and other compatible 4-inch bore-pump ends. It can replace a failed motor while retaining a serviceable pump section.

✓ Motor only. Pump end is separate
✓ Motor output: 0.55kW
✓ Supply: 220-240V single phase, two wire, 50Hz
✓ Starting equipment built into the motor
✓ Maximum motor submergence: 150m below the water surface
✓ Water temperature: up to 35°C
✓ Motor lead included. Control panel and cable jointing kit are separate

For compatible Lowara GS and other 4-inch NEMA bore-pump ends.

Lowara 4OS Motor Technical Data
Lowara 4OS Installation: three-wire single-phase and three-phase motors

More Information
Product Specifications
Lowara 4OS submersible motor. Representative manufacturer family photograph.
LOWARA 4OS05M/2W 0.55KW 220-240V SINGLE PHASE, TWO WIRE SUBMERSIBLE MOTOR
Lowara 4OS submersible motor. Representative manufacturer family photograph.
Lowara Submersible 4" Motor Only 0.37 kw 0.5 HP 3 Wire Single Phase PULO0.37KW1PHLOW
$616.08 /each
Lowara 4OS submersible motor. Representative manufacturer family photograph.
Lowara Submersible 4" Motor Only 0.37 kw 0.5 HP 2 Wire Single Phase PULO0.37KW1PH2WIRE
$886.12 /each
Lowara 4OS submersible motor. Representative manufacturer family photograph.
Lowara Submersible 4" Motor Only 0.37 kw 0.5 HP – Three Phase PULO0.37KW3PHLOW
$644.37 /each
Lowara 4OS submersible motor. Representative manufacturer family photograph.
Lowara Submersible 4" Motor Only 0.55 kw 0.75 HP 3 Wire – Single Phase PULO0.5KW1PHLOW
$629.82 /each
Lowara 4OS submersible motor. Representative manufacturer family photograph.
Lowara Submersible 4" Motor Only 0.55 kw 0.75 HP 2 Wire – Single Phase PULO0.55KW1PH2WIRE
$947.56 /each
Lowara 4OS submersible motor. Representative manufacturer family photograph.
Lowara Submersible 4" Motor Only 0.55 kw 0.75 HP – Three Phase PULO0.5KW3PHLOW
$657.31 /each
Lowara 4OS submersible motor. Representative manufacturer family photograph.
Lowara Submersible 4" Motor Only 0.75 kw 1 HP 3 Wire – Single Phase PULO0.75KW1PHLOW
$637.91 /each
Lowara 4OS submersible motor. Representative manufacturer family photograph.
Lowara Submersible 4" Motor Only 0.75 kw 1 HP 2 Wire – Single Phase PULO0.75KW1PH2WIRE
$987.99 /each
Lowara 4OS submersible motor. Representative manufacturer family photograph.
Lowara Submersible 4" Motor Only 0.75 kw 1 HP – Three Phase PULO0.75KW3PHLOW
$675.10 /each
Lowara 4OS submersible motor. Representative manufacturer family photograph.
Lowara Submersible 4" Motor Only 1.1 kw 1.5 HP 3 Wire – Single Phase PULO1.1KW1PHLOW
$731.69 /each
Lowara 4OS submersible motor. Representative manufacturer family photograph.
Lowara Submersible 4" Motor Only 1.1 kw 1.5 HP 2 Wire – Single Phase PULO1.1KW1PH2WIRE
$1,112.50 /each
Lowara 4OS submersible motor. Representative manufacturer family photograph.
Lowara Submersible 4" Motor Only 1.1 kw 1.5 HP – Three Phase PULO1.1KW3PHLOW
$731.69 /each
Lowara 4OS submersible motor. Representative manufacturer family photograph.
Lowara Submersible 4" Motor Only 1.5 kw 2 HP 3 Wire – Single Phase PULO1.5KW1PHLOW
$832.76 /each
Lowara 4OS submersible motor. Representative manufacturer family photograph.
Lowara Submersible 4" Motor Only 1.5 kw 2 HP – Three Phase PULO1.5KW3PHLOW
$829.52 /each
Lowara 4OS submersible motor. Representative manufacturer family photograph.
Lowara Submersible 4" Motor Only 2.2 kw 3 HP 3 Wire – Single Phase PULO2.2KW1PHLOW
$1,129.47 /each
Lowara 4OS submersible motor. Representative manufacturer family photograph.
Lowara Submersible 4" Motor Only 3 kw 4 HP – Three Phase PULO3KW3PHLOW
$1,283.90 /each
Lowara 4OS submersible motor. Representative manufacturer family photograph.
Lowara Submersible 4" Motor Only 4 kw 5.5 HP – Three Phase PULO4KW3PHLOW
$1,692.19 /each
Lowara 4OS submersible motor. Representative manufacturer family photograph.
Lowara Submersible 4" Motor Only 5.5 kw 7.5 HP – Three Phase PULO5.5KW3PHLOW
$2,170.82 /each
Lowara 4OS submersible motor. Representative manufacturer family photograph.
Lowara Submersible 4" Motor Only 7.5 kw 10 HP – Three Phase PULO7.5KW3PHLOW
$2,595.29 /each

Lowara 4OS05M/2W is a 0.55kW replacement motor for Lowara GS and other compatible 4-inch bore-pump ends. It can replace a failed motor while retaining a serviceable pump section.

For compatible Lowara GS and other 4-inch NEMA bore-pump ends.

For a Lowara GS pump end, matching models at this power are listed in the specifications. These two-wire motors can also be considered for compatible pump ends from other brands.

Starting equipment and motor protection are built into this two-wire motor. A separate capacitor starter box is not required. Automatic pressure or level control is a separate function.

The motor lead is included. The pump end, external control panel and cable jointing kit are not included. Extend the lead with correctly sized submersible cable and a waterproof joint suited to the installation.

Keep the motor submerged and provide water flow around its exterior for cooling. The standard water-temperature limit is 35°C with adequate cooling flow. A cooling sleeve may be needed in a wide bore or tank. Maximum motor submergence is 150m below the water surface. Do not run dry.

The oil-filled motor has windings that can be rewound during repair. It has a stainless-steel outer sleeve and a mechanical seal protected by a sand guard.

Replacement considerations

The standard NEMA connection allows cross-brand replacement where the pump and motor are correctly matched. Your installer needs to confirm that the motor can drive the pump and that the coupling, controls and installation suit the replacement. A higher motor rating does not by itself increase pump flow or pressure. Changing from a three-wire motor to a two-wire motor changes the starting arrangement.

If the installation uses a variable-speed controller, confirm the motor version before ordering. The 4OS installation manual specifies a specially ordered motor for frequency-converter operation.

Two-year warranty, subject to the applicable Australian Lowara supply terms and consumer rights.

Lowara 4OS Motor Technical Data
Lowara 4OS Installation: three-wire single-phase and three-phase motors

✓ Application
Replacement motor for compatible submersible bore-pump ends. Pump end is separate.

✓ Warranty
Two-year warranty, subject to the applicable Australian Lowara supply terms and consumer rights.

✓ Pump Compatibility
For compatible Lowara GS and other 4-inch NEMA bore-pump ends.
Lowara pump-end models at this output: 1GS05, 2GS05, 4GS05, 6GS05.
Motor output must cover the pump's maximum required shaft power over its intended operating range.
Confirm shaft and mounting fit, coupling clearance, rotation and bearing load before assembly.
Axial thrust capacity: 3000N.
Replacing a three-wire motor changes the starting arrangement.

✓ Starting & Motor Protection
Starting equipment and motor protection are built into this two-wire motor. A separate capacitor starter box is not required. Automatic pressure or level control is a separate function.
Two supply conductors plus protective earth.

✓ Included Equipment
Motor lead included.
Pump end, external control panel and cable jointing kit not included.

✓ Construction
Oil-filled, rewindable motor.
Stainless-steel outer sleeve.
Mechanical seal protected by a sand guard.

✓ Motor & Electrical Supply
4OS05M/2W: P2 0.55kW. 220-240V single phase. Two wire. 50Hz.
Enclosure: IP68. Insulation: Class F.
Protection settings and cable selection must match the motor nameplate.

✓ Cooling & Installation
Maximum standard water temperature: 35°C with at least 0.08m/s flow past the motor.
Maximum motor submergence: 150m below the water surface.
Keep the motor submerged. Fit a cooling sleeve if cooling flow is inadequate.
Do not run dry. Support the assembly using suitable hardware, not its electrical cable.
For horizontal installation, follow both the motor and pump installation limits.

✓ Switching Limits
Maximum 30 starts per hour for direct starting (full supply voltage), evenly spaced.
Maximum 20 starts per hour for impedance starting (a resistor or reactor limits the starting current).

✓ Variable-Speed Controllers
Confirm the supplied motor version is approved for frequency-converter operation.
The specially ordered frequency-converter version requires a 10% motor-output reduction under the 4OS installation instructions.
Maintain the required cooling flow at the lowest operating speed. Follow the motor and controller instructions.

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