Home » Products » Stainless Steel Submersible Motors » 60Hz Submersible Motor

Features and Benefits :

• A complete Motor Range : We offer a complete submersible motor range in different voltages :
  • 4” motors, single phase up to 4 kW.(Encapsulated & Rewindable)
  • 4” motors, three phase up to 7.5 kW.(Encapsulated & Rewindable)
  • 6” motors, three phase from 2.2 kW to 37 kW. (Rewindable)
  • 8” motors, three phase from 11 kW to 220 kW. (Rewindable)

High Motor Efficiency : Within the area of high motor efficiency Star is a market leader. This is due to newly developed motor concept which is introduced with the MS 100, MS101 and MS 160.

Shaft Seal : The Choice of material is ceramic/tungsten carbide providing optimum sealing, optimum wear resistance and long life. The spring loaded shaft seal is designed with a large surface and a sand shield. The result is a minimum exchange of pumped and motor liquids and no penestration of particles.

Over temperature protection : Both for Star MS submersible motors accessories for protection against over temperature is available. When the temperature become too high, the protection device will cutout and damage to the pump and motor be avoided.

Restart of the motor after cutout can be achieved in two ways :

• Manual restart or
• Automatic restart

Automatic restart means that the control unit attempts to restart the motor after 15 min. If the first attempt is not successful, restarting will be re-attempting at 30 minute intervals.

Protection Against Upthrust : In case of a very small counter pressure in connection with start-up there is a risk that the entire pump body may rise. This is called upthrust. Upthrust may damage both pump and motor. Therefore both pumps and motors are protected against upthrust as standerd, preventing upthrust from occurring in the critical start-up phase. The protection consists of either a built-in stop ring of hydraulic balancing.

Built in cooling chambers : In all submersible motors an efficient cooling is ensured by cooling chambers at the top and at the bottom of the motor, and by an internal circulation of motor liquid. As long as there is the required flow velocity, cooling of the motor will be efficient.

Lighting protection : The smallest Star submersible motor, i.e. of the type MS101, are all insulated in order to minimize the risk of motor bumout caused by stroke of lighting.

Reduced risk of short circuit : The embedded stator winding in the star MS submersible motor is hermetically enclosed in stainless steel. The result is high mechanical stability and optimum cooling. Also, this eliminates the risk of short circuit of the windings caused by condensed water.

Rewindable motors : The standerd shaft seal is a rubber lip type. The shaft seal is replaceable. The material features good wear resistance and resistance to particales. Together with the shaft seal housing, the sand shield forms a labyrinth seal, which duriing normal operating conditions prevents penetration of sand particles into the shaft seal. On request, motors can be supplied with a SiC/SiC seal.

Applications :

The QF Motors are suitable for the following application :

• Raw water supply.
• Irrigation systems.
• Groundwater lowering.
• Pressure boosting.
• Industrial applications.

Motored Liquids :

Clean, thin, non-aggressive liquids without solid particles or fibers.

Operating Conditions :

• Flow rate, Q : 0.1 – 335 m3/h.
• Head, H : Maximum 810m.

General :

• Curve tolerate according to ISO 9906, Annex A.
• The performance curves show Motor performance at actual speed cf. standard motor range.
  • The speed of the motors is approximately :
    • 4” motors : n=3460 min-1
    • 6motors : n=3460 min-1
    • 8” to 12” motors : n=3460 min-1
• The measurements were made with airless water at a temperature of 200c. The curves apply to a kinematic viscosity of 1mm2/s. When Motoring liquids with a density higher than that of water, motors with correspondingly higher outputs must be used.
• The bold cures indicate the recommended performance range.
• The performance curves are inclusive of possible losses such as non-return valve loss.

QF1, QF1.5, QF2, QF5, QF6, QF12, QF20, QF25 Curve :

• Q/H : The curves are inclusive of valve and inlet losses at the actual speed.
• Power Curve : Bpkw/Stage shows Motor power input per stage.
• Efficiency Curve : Efficiency shows Motor stage efficiency.

QF10, QF15, QF30, QF50, QF75, QF100, QF125, QF160, QF210, QF270, QF360 Curve :

• Q/H : The curves are inclusive of valve and inlet losses at the actual speed.Operation without non-return valve will increase the actual head at nominal performance by 0.5 to 1.0m.
• NPSHR The curve is inclusive of suction case and shows required inlet pressure.
• Power Curve : It shows Motor power input at the actual speed required inlet pressure.
• Efficiency Curve : Efficiency shows Motor stage efficiency.

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