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Electrical connection
6.7 Connecting converters
6.7
Connecting converters
NOTICE
Excessively high supply voltage
Material damage can occur if the supply voltage is too high for the insulation system.
SIMOTICS machines can be operated with SINAMICS G converters and SINAMICS S
converters (uncontrolled and controlled infeed) when maintaining the permissible peak
voltages.
Carefully observe the values in the following tables.
Rise times t
The insulation system of SIMOTICS machines corresponds to the specifications laid down
in IEC 60034-18-41 according to voltage stress category C (IVIC C = high stress).
Table 6- 9
Maximum voltage peaks at the motor terminals for line (DOL) motors, converter operation possible
Rated motor voltage
V
≤ 500 V
6.7.1
Connecting explosion-proof machines to the converter
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. 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
78
> 0.1 µs.
r
Û
phase-to-phase
V
pk
1500
900
WARNING
Maximum peak voltage at the motor terminals
Û
dependent on the rise time t
max
Û
phase-to-ground
V
pk
1100
900
r
t
Rise time
r
μs
0.5
0.1
Operating Instructions, 03/2018, A5E41926185A
U
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