Converter Operation On A Grounded Network - Siemens SIMOTICS FD 1MQ1 Operating And Installation Instructions
Low-voltage motor
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Service and Support (Page 171)
If you connect two motors in series in "tandem operation", locate a coupling between the
motors; this coupling should satisfy the Directive 2014/34/EU or the regulations that apply in the
country where the equipment is installed.
4.20.6
Converter operation on a grounded network
NOTICE
Damage resulting from protective conductor currents
When the machine is operated with a converter with current limiting, but without ground-fault
monitoring, protective conductor currents of up to 1.7 times the phase conductor current can
flow if there is a ground fault on the output side. Neither the PE conductors of normally rated
multi-conductor connecting cables nor the PE connecting points of standard terminal boxes is
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 FD 1MQ1
Operating Instructions 01/2019
Preparations for use
4.20 Converter operation
47
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