Electrical connection
6.5 Line supply connection
Installation and Operating Instructions SINAMICS G180
Operating Instructions, 02/2019, 4BS0751-007
95
●
If you are using an RCD circuit breaker, then as a result of the high capacitive discharge
currents, use an RCD circuit breaker with a high cut-off current. The leakage current
basically depends on the type, length and laying of the motor cable.
–
Use at least a 500 mA RCD circuit breaker for up to approx. 100 kW inverter output.
–
Use at least a 1 A RCD circuit breaker for more than 100 kW inverter output.
–
The RCD circuit breakers used must be of type B "sensitive to all current types" with
this label:
6.5.4
Connecting mains power cable to the inverter
You do not need any N conductor.
Procedure
●
Only connect the inverter via a permanently routed connecting cable. Refer to the
following table for the possible connection cross-sections for compact devices. The
connection cross-sections for cabinet units can be found in the technical data of the
inverter documentation.
●
Observe the switch manufacturer instructions when connecting cables directly at the main
switch. These are provided in the circuit diagram pocket in the invertercabinet. If
necessary, special equipment cable lugs must be used in order to be able to utilize the
connection spaces available.
Table 6- 3
Conductor cross-sections for compact devices
Frame size
Flexible cable
Rigid cable
BG K1
0,2 - 6 mm²
0,2 - 10 mm²
BG K2
4 - 16 mm²
2,5 - 25 mm²
BG K3
0,75 - 35 mm²
0,75 - 50 mm²
BG K4
2,5 - 120 mm²
2,5 - 120 mm²
BG K5
2,5 - 120 mm²
2,5 - 120 mm²
BG K51
2,5 - 120 mm²
2,5 - 120 mm²
BG K6
50 - 240 mm²
50 - 240 mm²
