Electrical connection
6.8 Final checks
1LA5/6/7/9, 1LG4/6, 1MA6/7, 1MB..1/2/3/4/5 - SH 63 ... 355
Operating Instructions, 06/2018, A5E44455710A
85
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 non-sparking "ec" "nA" type of protection
The operation of the explosion-proof machines on the converters 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 tripping unit.
Machines with increased safety "eb" type of protection
Converter operation for these machines must be expressly certified. It is essential that you
observe the separate 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 EC-type examination certificate.
Machines with type of protection, 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. The maximum
temperature at the cable entries is 120 °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 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.
Thermal protection (Page 43)
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