Delta MS300 Series User Manual page 32

4-1 System Wiring Diagram
Figure 4-1
Supply power according to the rated power
Power input
specifications indicated in the manual (refer to
terminal
Chapter 9 Specification).
There may be a large inrush current during
power on. Refer to Section 7-2 NFB to select a
NFB or fuse
suitable NFB or Section 7-3 Fuse Specification
Chart.
Switching the power ON/OFF on the primary
side of the electromagnetic contactor can turn
the drive ON/OFF, but frequent switching can
cause machine failure. Do not switch ON/OFF
more than once an hour.
Electromagnetic
Do not use the electromagnetic contactor as the
contactor
power switch for the drive; doing so shortens the
life of the drive.
Refer to Section 7-2 Magnetic Contactor / Air
Circuit Breaker to select the electromagnetic
contactor that meets your requirement.
When the main power supply capacity is greater
than 500 kVA, or when it switches into the phase
capacitor, the instantaneous peak voltage and
current generated may destroy the internal
circuit of the drive.
AC reactor
(input terminal)
It is recommended that you install an input side
AC reactor in the drive. This also improves the
power factor and reduces power harmonics. The
wiring distance should be within 10 m. Refer to
Section 7-4 AC/DC Reactor for details.
Used to reduce radiated interference, especially
in environments with audio devices, and reduce
input and output side interference.
Zero phase
reactor
The effective range is AM band to 10 MHz.
Refer to Section 7-5 Zero Phase Reactors for
details.
Can be used to reduce electromagnetic
EMC filter interference. Refer to Section 7-6 EMC Filter for
details.
Brake module
Used to shorten the deceleration time of the
&
motor. Refer to Section 7-1 Brake Resistors and
Brake resistor
Brake Units Used in AC Motor Drives for details.
(BR)
The motor cable length affects the size of the
reflected wave on the motor end. It is
AC reactor
recommended that you install an AC output
(output terminal)
reactor when the motor wiring length exceeds
the value listed in Section 7-4.
23
Chapter 4 WiringMS300
Table 4-1