SINAMICS G120
Standard inverters 0.37 kW to 250 kW (0.5 hp to 400 hp)
Line-side power components
Line reactors
4/77
Siemens D 11.1 · 2009
4
■
Overview
A line reactor reduces the system perturbations caused by
harmonics. This particularly applies in the case of weak line
supplies (line supply short-circuit power u
K
>1%).
Example: Line reactors for Power Modules frame sizes FSA to FSE
Example: Line reactor for PM240 Power Modules frame size FSGX
Example: Power Module frame size FSB with base line reactor and shield
bonding plate
Note: A line reactor must not be used in combination with a
PM250 or PM260 Power Module.
■
Benefits
Only AC reactors are available as reactors for the inverter.
• Only an AC reactor provides protection for the input rectifier of
the inverter.
• The capacitor lifetime of the inverter increases when using an
AC reactor by a factor of 2 when compared to the lifetime
when using a DC reactor.
• The harmonic behavior of AC reactors remain almost constant
over the complete lifetime. Over time (months), the harmonic
behavior of DC reactors changes.
• An AC reactor reduces possible dissymmetries between the
current phases. In this case, a DC reactor would not be effec-
tive.
To Next Page
Loading...