Submersible 6" motor DAB 6GF 9.2 kW, 3 × 400 V – two-pole, direct-on-line starting (DAB.MOTOR 6GF)

Product detailed description

DAB 6GF 9.2 kW (code I0612500) is a 6" submersible three-phase asynchronous motor with two poles, which drives the hydraulic unit of a submersible pump in a borehole or well. It is suitable for direct starting at 3 × 400 V and is compatible with 6" and 8" submersible pumps with a flange and NEMA connection – for example with the hydraulic parts of DAB SS6; to 10" pumps after verifying the flange dimensions.

Construction

The motor housing is made of stainless steel, all metal parts in contact with water are made of stainless steel or cast iron. The stator is enclosed in a hermetically sealed stainless steel casing, the rotor runs in a filling of demineralized water with a non-freezing lubricating mixture (water and polypropylene glycol), so the pumped water is not contaminated. Large axial forces are absorbed by a robust axial bearing of the Kingsbury type – at this power up to 16,000 N. The motor has a removable power cable with a replaceable connector, IP68 protection and insulation class F.

Operating conditions

• water temperature 0 to +35 °C with at least 0.3 m/s flow around the motor, otherwise a cooling jacket is required
• vertical and horizontal mounting (horizontal, if the pump's axial pull does not drop below 250 N)
• maximum submersion 300 m, maximum 20 direct starts per hour
• possibility of power supply via a frequency inverter 30 – 50/60 Hz with a 10 % power reduction
• the power of the connected pump must not exceed the motor power

Protection of the motor against overload and short circuit is ensured by the user using a suitable electrical panel; the power supply must also have a 30 mA residual current device. Installation and wiring must be carried out by a qualified person. The motor does not require regular maintenance.

Technical parameters

Frequently asked questions

With which pumps is the DAB 6GF 9.2 kW motor connected?
With 6" and 8" submersible pumps with a flange and NEMA coupling, for example with the hydraulic parts of DAB SS6. The pump power must not exceed 9.2 kW.

What cross-section of the power cable should be selected?
According to the instructions for direct starting at 380 – 400 V and 4 % voltage drop: 4 mm² up to 104 m, 6 mm² up to 155 m, 10 mm² up to 255 m, 16 mm² up to 402 m. A larger cross-section is required for longer lines.

When is a cooling jacket required?
If the water flow around the motor is slower than 0.3 m/s, for example in a wide well or tank. Without sufficient flow, the motor may not cool sufficiently.

Can the motor be controlled by a frequency inverter?
Yes, in the range of 30 – 50/60 Hz. The power must be reduced by 10 % and even at the lowest frequency, sufficient water flow around the motor must be maintained.