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The temperature monitoring of explosion-protected motors requires short-circuit protection
of the sensor cable depending on the sensor cable length:
• Sensor cable length ≤ 250 m: Short-circuit detection by the OM-SMT
• Sensor cable length > 250 m: Additional short-circuit protective measures, e.g. separate
routing or special rails
The protective measures must be evaluated in a risk analysis.
4.14.12
Achievable EMC category and maximum motor cable length
Requirement
Reliable and disturbance-free converter operation is only ensured when it is installed in an EMC-
compliant way.
Description
The achievable EMC category is dependent on the motor cable length and the line system
configuration. The following conditions apply to the permissible application environment.
Application environment
Cable length
Installation loca‐
tion
Line supply
Permissible line system configuration
Corresponds to IEC 61000-3-12, Table 4, for RSC ≥120. The compatibility level for harmonic voltage
1)
distortions at the line connection point must be taken into consideration
Complex, large-scale industrial applications and/or IT supply networks. An EMC plan must be drawn up.
2)
3)
Operation with the default pulse frequency or with reduced pulse frequency
An external line filter is required to comply with the requirements relating to CE certification.
4)
SINAMICS G220 converter
Operating Instructions, 04/2024, FW V6.2, A5E51781573B AB
Motor
Braking resistor
Residential environment
Light industry and com‐
merce
Heavy industry
Public
Non-public
4.14 EMC-compliant installation
Achievable EMC category
C2
Converter with integrated
line filter
3)
≤ 150 m shielded CY cable
≤ 10 m shielded CY cable
No
Yes
Yes
Yes
1)
Yes
TN or TT system with groun‐
ded neutral point
Application planning
C4
4)
Converter without in‐
tegrated line filter
≤ 200 m shielded
≤ 300 m unshielded
≤ 10 m shielded
No
No
Yes
2)
No
Yes
2)
Any
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