A-12
CDA3000 Operation Manual
Example for the digital output OSD01:
Attention: A corresponding driver relay has to be used between the
digital output and the motor contactor.
A.6 through use of a
line choke
Characteristics of environment class 3 include:
• Mains voltage fluctuations > + 10% U
N
• Short-time interruptions between 10 ms and 60 s
• Voltage asymmetry > 3%
Environment class 3 typically applies where:
• a major part of the load is supplied by power converters (dc choppers
or soft-start equipment).
• welding machines are present.
• induction or arc furnaces are present.
• large motors are started frequently.
• loads fluctuate rapidly.
t
0
0
1
0
1
f [Hz]
STR (Start/Stop)
power stage
0
1
e.g. OSD01 (ENMO)
TENMO
TENMO
Line chokes are required:
• Where the drive controller is used in applications with disturbance
variables corresponding to environment class 3, as per
EN 61000-2-4 and above (hostile industrial environment).
• With a dc-link between multiple drive controllers.
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