Siemens SIMOTICS XP 1MB5 SH400, Руководство по эксплуатации, Страница: 93 / 166

Second shaft extension
If the second shaft extension is not used:
● Carefully secure the feather key to prevent it from being thrown out, and for balancing type
"H" (standard type), ensure its weight is reduced to approximately 60 % of the original value.
● Using covers, carefully secure the unused shaft extension so that it cannot be touched.
Converter operation
● If the motor design requires connection to a specific converter type, carefully check the
supplementary data on the rating plate/supplementary plate.
● Carefully ensure that the converter is correctly parameterized. The parameterization data is
specified on the rating plate of the machine. Information about the parameters is available
in the operating instructions for the converter.
● Check that the supplementary equipment and devices to monitor the machine are correctly
connected and are functioning correctly.
● In continuous operation, carefully ensure that the motor cannot exceed the specified upper
speed limit n
max
or fall below the lower speed limit n
min
.
The permissible acceleration time to the limit speed n
min
depends on the parameter
assignment.
WARNING
Risk of explosion as a result of 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.
An explosion can occur in operation. This can result in death, serious injury or material
damage.
● Observe the data on the machine rating plate.
● Never fall below the minimum pulse frequency. This means that you avoid exceeding the
temperature class, and as a consequence igniting an explosive atmosphere.
WARNING
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 11) are followed before working on the motor.
7.2 Measuring the insulation resistance and polarization index
Measure the insulation resistance and the polarization index. This provides information about
the condition of the winding insulation.
Commissioning
7.2 Measuring the insulation resistance and polarization index
1MB5 SH 400/450
Operating Instructions, 05/2019, A5E45959221A
91