Rockwell Automation 8720MC 8720MC Regenerative Power Supply User Manual - Manual (Page 75)

Notes on Wiring 8720MC-RPS units comply with the requirements of CE Mark and
a Declaration of Conformity was issued for these units. Insert the
specified line filter into the power supply line if these units are used
as the units conforming to the requirements of CE Mark.
Caution must be paid to the following when performing wiring:
• Because instantaneous large power is required at overload,
provide sufficient AC power supply facility having a smaller
voltage fluctuation to prevent the input voltage from dropping
below the minimum specified requirement.
• The 8720MC-RPS Regenerative Power Supply does not contain a
circuit breaker. Install an adequate circuit breaker on the AC
input power line (see Sections "Installing Circuit Breaker" in this
chapter). When an earth leakage breaker is used, select a breaker
equipped with harmonic suppressor.
• The phases of the main terminals L
1
, L
2
and L
3
must be same as
the phases of the control power terminals L
1AUX
, L
2AUX
and
L
3AUX
. Failure to keep the phase relationship the same will cause
malfunction of the 8720MC-RPS Regenerative Power Supply.
• Completely separate the sequence control signal wiring from the
power wiring, and do not put the both into a same duct. Also,
do not route the both wires in parallel.
• To prevent noise problem, peripherals of the 8720MC-RPS
Regenerative Power Supply such as magnetic contactors and
relays must be provided with adequate surge suppressor, such as
CR filter for AC circuit and inverse-parallel diodes for DC
operation circuit.
• Install a varistor for absorbing surge between AC input wires
and a specified harmonic filter for reducing higher order
harmonics generated by fast switching.
• When wiring is finished, check that all the wiring has been
connected correctly before supplying power.
4-37 Wiring