Chapter 4 WiringMS300 (IP66/NEMA 4X)
4-3
4-1 System Wiring Diagram
Figure 4-1
Power input
terminal
Please refer to Chapter 9 Specification Table in
the user manual for details.
NFB or fuse
There may be a large inrush current during
power on. Refer to Section 7-2 NFB to select a
suitable NFB or Section 7-3 Fuse Specification
Chart.
Electromagnetic
contactor
Switching the power ON/OFF before the
magnetic contactor more than once per hour
can damage the drive.
AC reactor
(input terminal)
When the mains power capacity is > 500 kVA or
when the drive is preceded by a capacitor bank,
the instantaneous peaks voltage and current
may destroy the drive. In that case it is
recommended to install an AC input reactor that
also improves the power factor and harmonics.
The cable between reactor and drive should be
< 10 m.
Please refer to Section 7-4.
Zero-phase
reactor
Used to reduce radiated emission, especially in
environments with audio devices, and reduce
input and output side interference.
The effective range is AM band to 10 MHz.
Please refer to Section 7-5.
EMC filter
Can be used to reduce electromagnetic
interference.
Please refer to Section 7-6.
Brake module
&
Brake resistor
(BR)
Used to shorten the deceleration time of the
motor.
Please refer to Section 7-1.
AC reactor
(output
terminal)
The wiring length of the motor affects switching
current peaks. It is recommended to install an
AC output reactor when the motor wiring length
exceeds the value listed in Section 7-4.
Table 4-1
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