Delta MH300 Series - 4-1 System Wiring Diagram

Chapter 4 WiringMH300
4-3
4-1 System Wiring Diagram
Power input
terminal
Please refer to Chapter 9 Specification Table
in the user manual for detail.
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 one per hour
can damage the drive.
AC reactor
(input terminal)
When the mains power capacity is > 500kVA 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 facto
r and
harmonics. The cable between reactor and
drive should be < 10m.
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 10MHz.
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.