Electrical connection
6.7 Final checks
1MB..5/6 shaft height 71 ... 355
Operating Instructions, 07/2020, A5E41926185A
81
Operating explosion-protected 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. Tripping units according to Directive 2014/34/EU ("Explosion Protection
Directive") 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"
These machines are generally equipped with 3 PTC thermistors in accordance with DIN 44082
with a rated response temperature that depends on the maximum possible surface
temperature. Select the PTC thermistors 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 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.
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.
To Next Page
Loading...
