Chapter 4 Wiring of Inverter
ET/EP/EH Series Intelligent Flexible Driver Manual
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EP6/ET6
inverter
capacity
(kW)
Emergency stop device
The overall design and installation must include an emergency stop device and other required safety
device. Controlling the motor by means of a key from the inverter operator, or by commands from
the I/O terminals or communications does not guarantee:
Achieving emergency stop of the motor.
Separating the inverter from dangerous voltages.
4.1.2.3 Input power cables/connections
The input cable connection can be any of the following:
The four-core cable (three-phase and grounding protection wire) does not require shielding
layer (if there are requirements for conducted and radiated disturbances, the shielding wire
needs to be configured).
Four-core insulated conductors installed in the conduit.
In any case, the conductor must be smaller than the maximum limit defined by the terminal size.
Motor cables should be used in derating when they are too long or when the cross-sectional area of
the motor cable is too large. Only cables with a specified cross-sectional area should be used for
inverters (see Table 4-11). Since the larger the cross-sectional area of the cable, the greater the
capacitance to ground and the greater the leakage current to ground, the use of cables with a larger
cross-sectional area should result in a lower output current, with a current reduction of about 5% for
each additional step in area. Table 4-11 lists the cable types for copper-core cables at different load
currents. The recommended models are only available for the cases listed in the upper part of the
table. It is not recommended to use aluminum-core cables.
Table 4-3 Corresponding load currents for cables
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