Installing
3.2 Connecting
SINAMICS G120C, FSD ... FSF inverters
26 Compact Operating Instructions, 11/2016, FW V4.7 SP6, A5E39339884B AA
To install the inverter in compliance with UL/cUL, perform the following steps:
● Use the specified protection devices.
● A multi-motor drive is not permissible, i.e. simultaneously operating several motors
connected to one inverter.
● The integrated semiconductor short-circuit protection in the inverter does not provide
branch protection. Install branch protection in compliance with the National Electric Code
and possibly relevant local regulations.
● Use copper cables, Class 1, 60 °C or 75 °C to connect line supply and motor.
● For frame size FSE, use copper cables, Class 1, 75 °C to connect a braking resistor.
● For frame size FSF, to connect the line supply and motor, only use UL approved ring-type
cable lugs (ZMVV), which are certified for the particular voltage. Permissible current of
the ring-type cable lugs ≥ 125 % of the input or output current.
● Leave parameter p0610 in its factory setting.
The factory setting p0610 = 12 means: The inverter responds to motor overtemperature
immediately with an alarm and after a certain time with a fault.
● Use the specified protection devices.
● Use a surge protection device with article no. 5SD7424-1.
● Alternative: Install the inverter with an external surge protection device with the following
attributes:
– Surge protection device with ‘listed’ test symbol: category checking numbers VZCA
and VZCA7
– Rated voltage 3-phase 480/277 VAC, 50/60 Hz
– Terminal voltage V
PR
= 2000 V, I
N
= 3 kA min, MCOV = 508 VAC, SCCR = 40 kA
– Suitable for SPD applications, type 1 or type 2
● When commissioning the drive system, set the motor overload protection to 115%, 230%
or 400% of the rated motor current using parameter p0640. This means that motor
overload protection according to CSA C22.2 No. 274 is complied with.
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