Final Checks - Siemens SIMOTICS A 1FU9 Operating Instructions Manual

Synchronous motors

Table of Contents

Depending on the step height, the voltage rise times for the individual voltage steps in the

line-to-ground voltage at the motor end of the cable must not fall below the following values.

Table 7-7

Rise times as a function of voltage level

Step height

System, converter-cable-electrical machine

Please observe the information in accordance with EN / IEC 60034-17 and EN / IEC 60034-25

regarding winding stress. For line supplies with operating voltages up to 690 V, the

maximum value of the voltage peaks at the end of the cable must not exceed twice the

value of the converter's DC-link voltage.

7.8

Final checks

Before closing the terminal box/terminal base of the machine enclosure, check the following:

• Establish the electrical connections in the terminal box in accordance with the information

in this documentation.

• Maintain the air clearances between non-insulated parts as described in Chapter Minimum

air clearances. (Page 72)

• Avoid protruding wire ends.

• In order not to damage the cable insulation, freely arrange the connecting cables.

• Connect the machine corresponding to the specified direction of rotation.

• Keep the inside of the terminal box clean and free from trimmed-off ends of wire.

• Ensure that all seals and sealing surfaces are undamaged and clean.

• Correctly and professionally close unused openings in the terminal boxes. Observe the

information in this documentation.

• Observe the information on torques in this documentation.