8 Technical Reference
8.1 Motor data
Feature Description
Motor type Squirrel-cage induction
Frequency 50 Hz or 60 Hz
Supply 1-phase or 3-phase
Starting method • Direct on-line
• Star-delta
• Soft starter
• Variable frequency drive (VFD)
For more information, see
VFD requirements
on
page 23.
Maximum starts for each hour 15 evenly spaced starts for each hour
Code compliance IEC 60034-1
Voltage variation without overheating ±10%, if it does not run continuously at full load
Voltage imbalance tolerance 2%
Stator insulation class F (155°C [311°F])
Motor encapsulation
Motor encapsulation is in accordance with IP68.
8.1.1 Thermal contacts, opening temperature
The table shows the opening temperature for the thermal contacts on products approved for
hazardous locations.
Temperature and
temperature class
Motor
3-phase 1-phase
125°C (257°F), T4 13-08-2BB 13-08-4BB 13-10-2BB 13-10-2BB 13-10-4BB
140°C (284°F), T3 13-10-4BB
8.2 Application limits
Data Description
Liquid temperature Maximum 40°C (104°F)
The pump is intended to operate completely submerged in the pumped
liquid.
Warm-liquid version: 70°C (158°F) maximum
Liquid density 1100 kg/m³ (9.2 lb for each US gal) maximum
pH of the pumped media 5.5–14
Depth of immersion Maximum 20 m (65 ft)
Other For the specific weight, current, voltage, power ratings, and speed of the
pump, see the data plate of the pump.
8.3 Minimum permitted liquid level
In hazardous areas, this information is critical for the safety of the installation of this product.
The pump must completely submerged in the pumped liquid during operation.
8 Technical Reference
Flygt 3069 Installation, Operation, and Maintenance Manual 61
EN
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