8 Technical Reference
8.1 Motor data
Feature Description
Motor type Squirrel-cage induction motor
Frequency 50 Hz or 60 Hz
Supply 1-phase or 3-phase
Starting method • Direct on-line
•
Star-delta
• Soft starter
Maximum starts per hour 15 evenly-spaced starts per 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 can be operated at full load only if at least half the stator housing is
submerged.
The stainless steel version of the pump can be operated at full load only if the
complete stator housing is submerged.
Warm-liquid version: 70°C (158°F) maximum
Liquid density 1100 kg/m³ (9.2 lb per 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.
This pump can be partly submerged during operation, but it must be submerged to half
the drive unit length.
8 Technical Reference
58 Flygt 3069 Installation, Operation, and Maintenance Manual
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