Commissioning and Diagnostics
3-5
EM 148-FC
Frequency Converter
A5E00065321-03
3.4
Unusual operating conditions
Operation under conditions such as the following can lead to an increased
thermal load on the frequency converter:
High pulse frequency (16 kHz)
Increased supply voltage (500 V)
Low motor frequency (operating speed)
Increased ambient temperature
Constant steep ramping
If a number of these conditions are combined, the frequency converter heats up
considerably. This can lead to the frequency converter being shut down with a
diagnosis of overload. The heat sink of the frequency converter can become very
hot.
To prevent this happening, you can do the following things:
Reduce the pulse frequency
Increase the motor frequency
Reduce the supply voltage
Longer ramp times
Ensure better cooling
Summary of Contents for SIMATIC EM 148-FC
Page 56: ...Functions and Technical Specifications 4 22 EM 148 FC Frequency Converter A5E00065321 03 ...
Page 66: ...Mode of Functioning 5 10 EM 148 FC Frequency Converter A5E00065321 03 ...
Page 70: ...Dimensioned Drawing B 2 EM 148 FC Frequency Converter A5E00065321 03 ...
Page 76: ...4 Product Information on Manual EM 148 FC Frequency Converter Edition 04 2003 A5E00476687 03 ...