Technical Data
5
Dry-Run Protection
The SQ and SQE incorporate integrated Dry-Run protec-
tion. When the water level falls below the inlet of the pump
the pump will shut off. After a period of time, the pump will
then automatically start up again.
For the SQ pumps the cut-off level is factory-set. For the
SQE pumps you must set this level by using a CU300 and
R100.
High Motor Efficiency
The SQ and SQE motors are based on a permanent
magnet rotor which produce high efficiency within a wide
load range. The high and flat efficiency curve of the
Permanent-Magnet motor allows for a coverage of a wide
power range with the same motor, as compared to con-
ventional AC motors. For SQE pumps, this means three
motors to cover the horsepower range from 1/3 to 1.5Hp.
High Pump Efficiency
The pump components are made from a 30% glass filled
engineered composite. The pumps are designed to
deliver at peak efficiency levels. Because of high pump
efficiencies, overall power consumption will be reduced.
Excellent Wear Resistance
The SQ/SQE pump design uses “floating” impellers. Each
impeller has its own tungsten carbide/ceramic bearing.
This design and the high quality materials make the pump
very wear resistant especially in sandy conditions.
Amps
sec.
Soft start
DOL
2
Protection against up-thrust
During start-up many pumps start in an up-thrust condi-
tion. To prevent damage caused by up-thrust a top
bearing has been placed in the motor to protect both the
pump and the motor against up-thrust.
Soft-Start
Both the SQ and SQE motors have a soft start because of
the integrated electronics. Soft start reduces the starting
current and gives the pump a smooth and steady accel-
eration.
The soft-start will reduce your chance of water hammer,
minimizes the risk of wear and prevent overloading of your
circuit during start-up.
High Starting Torque
Because of the permanent-magnet motor the SQ/SQE
pumps have excellent starting capabilities. The high
locked rotor torque produced by the PM motor provides a
starting torque that is 1.5 times greater than conventional
pump motors. Even if the voltage is low the PM motor will
still maintain a high starting torque.
Overvoltage and Undervoltage Protection
Overvoltage and undervoltage may occur at anytime
especially if you have an unstable voltage supply.
The integrated voltage protection of the SQ and SQE
motors protects the motors when the voltage falls outside
the permissible voltage range.
The 230V pump will cut out if voltage falls below 150V or
above 280V. The motor will automatically start when the
voltage is within the permissible voltage range. It is not
necessary to have additional voltage protection.
Overload Protection
When the pump load rises above the maximum amp level,
the motor will automatically compensate and reduce the
speed to maintain its maximum amp level. If the speed
drops to 65% of the nominal speed, the motor will shut off.
Features and Benefits
200 250 300 350 400 450 500 550 600 [W]
45
50
55
60
65
70
[%]
Conventional 1ph
Conventional 3ph
MS 3
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