Operation On A Converter With A Low Pulse Frequency; Converter Operation On A Grounded Network - Siemens SIMOTICS HT Series Operating Instructions & Installation Instructions

6.6.1

Operation on a converter with a low pulse frequency

NOTICE
Increased motor temperature
If the pulse frequency is less than the rated pulse frequency, then increased motor losses
occur. This results in a higher motor temperature.
● Reduce the power to prevent exceeding the temperature class and to avoid consequential
● Contact the Service Center if necessary.
6.6.2

Converter operation on a grounded network

NOTICE
Damage resulting from protective conductor currents
When the machine is operated on a converter with current limiter, but without ground-fault
monitoring, protective conductor currents of up to 1.7 times the external conductor current
can arise if there is a ground fault on the output side. Neither the PE conductors of normally
rated multi-core connecting cables nor the PE connecting points of normal terminal boxes
are suitable for this purpose. Material damage can result.
● Use an appropriately sized PE conductor.
● Connect the PE conductor to the grounding terminal on the motor enclosure.
SIMOTICS HT Series HT-direct 1FW4...1......A
Operating Instructions 11/2018
premature thermal aging of the insulation.
Electrical connection
6.6 Converter operation
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