Installation
3.3 Electrical Installation
Distributed converter for SIMOGEAR geared motors
Getting Started, 04/2018, FW V4.7 SP10, A5E36100338B AG
51
Thermal stability of the system
The SINAMICS G110M system is comprised of a motor and a converter which are
designed to work together. The system can generate a significant amount of heat which
can affect the performance of your application.
If the duty cycles of the system are not calcu
lated properly, it could result in your application
not working efficiently and produce nuisance trips from overtemperature faults.
To ensure the thermal stability of the system, duty cycles should be calculated using the
lowest rated component of the system - this should be either the motor or the converter
depending on the your application.
To ensure trouble free operation we recommend the mains supply impedance is less than
1% (RSC > 100).
UL transient surge suppression requirements
To ensure that the electrical installation of this equipment complies with the UL
requirements for transient surge protection, the following requirement must be strictly
adhered to:
Transient surge suppression shall be installed on the line side of this equipment and shall
be rated 480 v (phase to ground), 480 v (phase to phase), suitable for overvoltage category
III and shall provide protection for a VPR maximum of 2 kv, type 1 or type 2 SPD
application.
Note
Optional 24 V PSU loss of power
The optional 24 V PSU derives power from the mains supply to the converter. Should the
mains supply be removed from the converter, the 24 V PSU will not longer provide power to
the control and
communications components of the
Connections and interference suppression
All connections should be made so that they are permanent. Screwed connections on
painted or anodized metal components must be made either by means of special contact
washers, which penetrate the isolating surface and establish a metallically conductive
contact, or by removing the isolating surface on the contact points.
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