Circuit Breaker; Connecting Control Cable - Siemens SINAMICS G180 Installation And Operating Instructions Manual

Electrical connection

6.4 Connecting control cable

● Locate a gL fuse or circuit breaker upstream from the inverter.
● In the case of the circuit breaker, set the thermal release to 1.2x the inverter continuous
Procedure when the motor has a significantly lower rating than theinverter (I
● Protect the inverter against short-circuits.
● Dimension the fuse value as follows: I
● Parameterize the inverter parameter P-INVERTER DATA/I contin. as a maximum to the
● Locate a general line fuse or circuit breaker upstream from the inverter.
● In the case of the circuit breaker, set the thermal release to 2x the rated motor current
6.3

Circuit breaker

In order to safely disconnect the inverterfrom the line supply, connect a main switch or a circuit
breaker on the line side of the inverter.
The main switch or the circuit breaker must be capable of carrying at least 1.2 times the
inverterrated current.
The switching capacity of the main switch or the circuit breaker must equal the short-circuit
current of the supply system.
6.4 Connecting control cable
● Connect the control cables as described in section "Communication options" (Page 84) or
● Use shielded, twisted pair cables for the connection of signal lines in order to increase the
● When installing cables and selecting the cabling materials, it is essential that you observe
● Instructions for correct EMC connection can be found in section "Correct EMC installation
● For more detailed information about control cable terminals, please refer to section
52
input current as stamped on the type plate and the magnetic release to the lowest possible
value, between 1.5 and 2x the value of the inverter continuous input current.
– Only use circuit breakers without time grading (time discrimination).
– The break time of the circuit breaker in the case of a short circuit must be less than 8
ms.
than calculated.
fuse value.
stamped on the type plate and the magnetic release to the lowest possible value, between
1.5 and 2x the value of the inverter continuous input current.
– The break time of the circuit breaker in the case of a short circuit must be less than 8
ms.
according to the supplied equipment documentation.
signal quality.
the information in section "Safe isolation in accordance with EN 61800‑5‑1" (Page 97).
and connection" (Page 37).
"Technical data of control cable terminals" (Page 176).
< 2 * I . Use the next lower standard fuse value
fuse mot
Installation and operating instructions Sinamics G180
Operating Instructions, 05/2013, 4BS0751-001
< 0.5 * I )
mot fu