Siemens SINAMICS G120 Operating Instructions Manual page 37

Components for United States / Canadian installations (UL/cUL)
In order that the system is UL/cUL-compliant, use UL/cUL-certified J-type fuses, overload
circuit-breakers or intrinsically safe motor protection devices. For each frame size A to C use
class 1 75° C copper wire only.
Install the inverter with any external recommended suppressor with the following features:
● Surge-protective devices; device shall be a Listed Surge-protective device (Category
● Rated nominal voltage 480/277 V
● Clamping voltage V
● Suitable for Type 1 or Type 2 SPD application
● Clamping shall be provided between phases and also between phase and ground
Connecting the motor
The following cable lengths are permissible:
● Unshielded 100 m
● Shielded:
Star connection and delta connection
With SIEMENS motors, you will see a
diagram of both connection types on the
inside of the cover of the terminal box:
• Star connection (Y)
• Delta connection (Δ)
The motor rating plate provides
information about the correct connection
data.
SINAMICS G120C Inverter
Operating Instructions, 01/2011, FW 4.4, A5E02999804A AB
code VZCA and VZCA7)
= 2000 V, I
PR
– 50 m for inverter without filter
– 25 m for inverter with filter
, 50/60 Hz, 3-phase
AC
= 3 kA min, MCOV = 550 V
N
Installing
4.4 Connecting the inverter
, SCCR = 40 kA
AC
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