Table of Contents
Advertisement
Converter operation
● If the design of the motor requires connection to a particular converter type, the rating plate
● The converter is correctly parameterized. The parameterization data is specified on the
● Any supplementary motor monitoring devices and equipment have been correctly
● In continuous operation, the motor cannot exceed the specified upper speed limit n
Dangerous voltage via the converter
As long as the feeding converter is switched on, or the DC link of the converter is not
discharged, there can be a voltage at the motor terminals even when the rotor is not moving.
The voltage is up to 1000 V, depending on the converter type.
Ensure that the five safety rules (Page 16) are followed before working on the motor.
7.3
Measuring the insulation resistance before commissioning
Measuring the insulation resistance and polarization index (PI) provides information on the
condition of the machine. It is therefore important to check the insulation resistance and the
polarization index at the following times:
● Before starting up a machine for the first time
● After an extended period in storage or downtime
● Within the scope of maintenance work
The following information is provided regarding the state of the winding insulation:
● Is the winding head insulation conductively contaminated?
● Has the winding insulation absorbed moisture?
As such, you can determine whether the machine needs commissioning or any necessary
measures such as cleaning and/or drying the winding:
● Can the machine be put into operation?
● Must the windings be cleaned or dried?
Detailed information on testing and the limit values can be found here:
"Testing the insulation resistance and polarization index" (Page 61)
SIMOTICS FD 1MH1
Operating Instructions 08/2017
will contain corresponding additional information.
rating plate of the machine. Information about the parameters is available in the operating
instructions for the converter.
connected and are functioning correctly.
undershoot the lower speed limit n
The permissible acceleration time to the limit speed n
assignment.
WARNING
7.3 Measuring the insulation resistance before commissioning
.
min
depends on the parameter
min
Start-up
or
max
107
Advertisement
Table of Contents
