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Section 1
General Information
Installation & Operation 2-3
MN400
Figure 2-2 Typical Motor Performance VS Voltage Variations
+20
+15
+10
+5
0
−
5
−
10
−
15
−
20
−
15
−
10
−
5
0
+5
+10
+15
Voltage Variations (%)
Changes in Motor Performance (%)
Full -Load
Current
Full -Load
Current
Power
Factor
Power
Factor
Efficiency
Efficiency
Maximum
Torque
Maximum
Torque
Rotation
All three phase motors are reversible. To reverse the direction of rotation, disconnect and lock out power
and interchange any two of the three line leads for three phase motors. For single phase motors, check
the connection diagram to determine if the motor is reversible and follow the connection instructions for
lead numbers to be interchanged. Not all single phase motors are reversible.
Adjustable Frequency Power Inverters used to supply adjustable frequency power to induction motors
produce wave forms with lower order harmonics with voltage spikes superimposed. Turn
−
to
−
turn,
phase
−
to
−
phase, and ground insulation of stator windings are subject to the resulting dielectric stresses.
Suitable precautions should be taken in the design of these drive systems to minimize the magnitude of
these voltage spikes. Consult the drive instructions for maximum acceptable motor lead lengths, and
proper grounding.
Luggage Point STP ST18 Pre Treatment (Aqua-Screen (Andritz) Operation and Maintenance Manual) General
Q-Pulse Id: TMS579
Active: 13/12/2013
Page 179 of 316