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When operating cables with long cables are configured for the following requirements, all models of inverters will operate at full load according to the specifications:
Dimensions A to F
Ø with shielding: 50m
Ø Unshielded: 150m
Dimensions FX and GX
Ø with shielding: 100m
Ø Unshielded: 150m
If the output reactor specified in catalog DA 51.2 is used, the following cable lengths are also possible:
Ø with shielding: 200m
Ø Unshielded: 300m
2.4.2 Connection of power supply and motor WARNING The inverter must be grounded reliably when it is put into operation.
绝缘 Before connecting the inverter to the power cable or replacing the power cable of the inverter, complete the insulation test of the power cable.
确信 Make sure that the motor and supply voltage match correctly. It is not allowed to connect MICROMASTERS frequency converters to higher voltage power supplies.
̈ When connecting a synchronous motor or connecting several motors in parallel, the frequency converter must be under U/f control characteristics (P1300 =
0, 2 or 3) operation.
Note After the power cable and motor cable have been connected to the appropriate terminals of the inverter, you must make sure that the front cover of the inverter is properly closed when the power supply is connected!
Tips ̈ Make sure that the circuit breaker/fuse corresponding to its rated current is properly connected between the power supply and the frequency converter (refer to the table in Chapter 7 below).
̈ Use only one-level 60/75oC copper wire for connection cables (UL compliant). For the tightening torque of the power terminal, refer to Table 7-2 below.
Wiring and Removing Power Supply and Motor Terminals After removing the front cover, the MICROMASTER 440 Inverter can be disconnected and connected to the power supply and motor terminals (see Figure 2-8 and Figure 2-10).
When the front cover of the inverter is open and the terminals are exposed, the wiring of the power supply and motor terminals is shown in Figure 2-11.
Wiring of the brake unit (only dimensions FX and GX)
At the top of the frequency converter there is a window for removing and connecting the DC link. These terminals can be connected to external brake units.
The positions of the windows are shown in Figures 2-9 and 2-10.
The maximum cross section of the connecting conductor is 50mm2, and on the side of the inverter, the end of the cable should have a flat section with a hot-fitted lug. This measure is very important for ensuring the insulation gap and creepage distance.

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