Final Checks - Siemens SIMOTICS XP Operating Instructions Manual

Machine overheating
Operating explosion-proof machines at the converter without using the appropriate
protective equipment can result in death or severe injury.
Always use PTC thermistor monitoring when operating explosion-protected machines at the
converter. Trip units according to Directive 2014/34/EU ("Explosion Protection Directive") or
according to country regulations are always necessary when using PTC thermistor
monitoring.
Machines with types of protection flameproof enclosure "db", dust explosion protection
"tb" or dust explosion protection "tc"
For converter operation, these machines must be equipped with 3 PTC thermistors in
accordance with DIN VDE V 0898-1-401 with a rated response temperature that depends on
the maximum possible surface temperature. Select the PTC thermistor trip units in
accordance with this standard. If the temperature of the cable bushings is not stated on the
rating plate, it is max. 70 °C. Use suitable cables for this temperature. Do not exceed the
maximum frequency dependent on the number of poles, which is stamped on the rating
plate.
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 public grids 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.
6.7

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 71)
• 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.
1MB..5/6 shaft height 71 ... 355
Operating Instructions, 10/2021, A5E41926185A
WARNING
Electrical connection
6.7 Final checks
81