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Siemens D 21.4 · 2017
Tools and configuration
Configuration notes
Power units
13
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Configuration
(continued)
Line-side power options (main switch, fuses, line filters, etc.)
The following line-side options are recommended for the drive
configuration:
General overview of line infeed
The main switch may take various formats:
•
Main and EMERGENCY STOP switch + fuse switch discon-
nector (with leading signal via auxiliary contact for trip mode)
•
Load interruptor with fuses
•
Circuit breaker
To protect the units against line-side surge voltages, it is advis-
able to install overvoltage protection directly at the infeed point
(upcircuit of main switch). Surge protection is essential in order
to satisfy the requirements of Canadian standard CSA C22.2
No. 14-05. For examples of suitable surge voltage arresters, go
to
www.raycap.com
or
www.dehn-international.com
Depending on the power rating required, a fuse switch dis-
connector combined with a contactor or a circuit breaker can
be used as the main switch.
A line contactor can be used, for example, if the drive has to be
disconnected from the line supply in the event of a fault or for
remote tripping. Follow the instructions in the SINAMICS S120
Configuration Guides to interlock the line contactor in the context
of safety functions.
A line filter should be used on TN (grounded) systems to reduce
system disturbance.
PE
U1 / L1
U1 / L2
U1 / L3
Line Module
Line fuses
Main switch
Line
contactor
Line filter
Line reactor
G_D212_EN_00017b
© Siemens AG 2017