Instruction Manual
Page 12 of 40 Issue: 2.1
N:\Engineering\Manuals\Pump Unit E2-30 & 40 R2.1.doc
Installation – Section 3.2 - Electrical
Inverter
The pump cycle rate and thus the fluid output is controlled by adjusting the motor
speed, this is achieved by changing the electrical frequency input to the motor
between the range of 20 and 80 Hz.
A suitable 3PH AC inverter must be used to control the motor speed,
Where the customer provides a suitable inverter then the following parameters are to
be used.
Important! The electric motor is certified for use in a hazardous area between
frequencies of 20 Hz an 80 Hz, therefore it is essential that this range cannot be
inadvertently exceeded by the operator as this will invalidate the certification
and use of the electric motor.
Required European Inverter Settings Value
Maximum Hz output 80 Hz
Minimum Hz output 20 Hz
Acceleration Ramp 5 Seconds
Deceleration Ramp 0.1 Seconds
Rated Motor Power 1.5 kW
Rated Motor Current 3.8 A
Rated Motor Voltage 400 V
Rated Motor speed 1440 RPM
Rated Motor Power Factor 0.81
Rated Motor Efficiency 78 %
Rated Motor Frequency 50 Hz
Application Criteria
In a general manner inverters can be connected directly to the power supply line
without line reactors. But in this case, ensure the following:
To prevent damage to the inverter and to ensure its expected life, minimum line
impedance that introduces a voltage drop of 1%, as a function of the motor load,
should be used. If the line impedance (transformers + wirings) is lower than these
values, it is recommended to use line reactor.
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