Siemens SINAMICS G120C Getting Started page 13

Components for United States / Canadian installations (UL/CSA)
In order that the system is UL/CSA-compliant, use UL/CSA-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 converter 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.
EMC compliant installation
Rules for EMC-compliant installation:
Install the converter on a metal mounting plate.

The mounting plate has to be unpainted and
with a good electrical conductivity.
Use shielded cables for the following

connections:
– Motor and motor temperature sensor
– Braking resistor
– Process interfaces (Field bus, digital and
analog inputs and outputs)
Use a clamp for connecting each shielded

cable. Connect the shield to the mounting plate
or to the shield plate through a good electrical
connection and through the largest possible
surface area.
SINAMICS G120C frequency converter
Getting Started, 03/2012, FW V4.5, A5E03831830B AA
code VZCA and VZCA7).
= 2000 V, I
PR
, 50/60 Hz, 3-phase.
AC
= 3 kA min, MCOV = 550 V
N
Screening example for converter frame size A
Installing
3.2 Electrical installation
, SCCR = 40 kA.
AC
11