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Electrical connection
6.7 Final checks
Machine overheating
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. Trip units according to Directive 2014/34/EU ("Explosion Protection Directive") or
according to country regulations are always necessary when using PTC thermistor
monitoring, e.g. for USA/CANADA: CSA C22.2 or NFPA70, Article 500.
Machines with non-sparking "ec" or "nA" type of protection Class I, Div. 2
Operating explosion-proof machines with a converter is permitted, when the specifications
for the speed control range and torque characteristic are observed, and if winding
temperature monitoring is ensured via the integrated temperature sensors in conjunction
with a certified trip unit.
Machines with increased safety "e" or "eb" type of protection
Converter operation for these machines must be expressly certified. Observe the specific
manufacturer's information and instructions. Converter and protective devices must be
marked as belonging together and the permitted operating data must be defined in the
common certificate, e.g. EU-type examination certificate, IECEx certificate of conformity or
country-specific certificate.
Machines with type of protection, dust explosion protection "tb", dust explosion
protection "tc" or Class II, Div. 2
These machines are generally 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 thermistors in accordance with this standard. If
the temperature of the cable glands is not stamped on the rating plate, then 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
Carefully comply with the information and data provided in 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.
100
WARNING
1MB1.33 Eagle Line shaft heights 71 ... 315
Operating Instructions, 08/2023, A5E52990459A
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