INVT CHF100A-004G-2, Operation Manual

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CHF100A series high performance universal inverter
.21.
When two motors are running at the same time (i.e. winding application), one is in driving
status and the other is in regenerative status. In this case the DC buses of these two
inverters can be connected in parallel so that the regenerated energy can be supplied to
motors in driving status whenever it needs. Its detailed wiring is shown in the following
figure:
Figure 4.20 Wiring of common DC bus.
Notice: Two inverters must be the same model when connected with Common DC
bus method. Be sure they are powered on at the same time.
4.4.6 Ground Wiring (PE)
In order to ensure safety and prevent electrical shock and fire, terminal PE must be
grounded with ground resistance. The ground wire should be big and short, and it is
better to use copper wire (>3.5mm
2
). When multiple inverters need to be grounded, do
not loop the ground wire.
4.5 Wiring Control Circuit
4.5.1 Precautions
4.5.1.1 Use shielded or twisted-pair cables to connect control terminals.
4.5.1.2 Connect the ground terminal (PE) with shield wire.
4.5.1.3 The cable connected to the control terminal should leave away from the main
circuit and heavy current circuits (including power supply cable, motor cable, relay and
contactor connecting cable) at least 20cm and parallel wiring should be avoided. It is
suggested to apply perpendicular wiring to prevent inverter malfunction caused by
external interference.