11.4 Option
11-32
[2] Power regenerative PWM converters, RHC series
(1) Overview
îš„ Possible to reduce power supply facility capacity
Its power-factor control realizes the same phase
current as the power-supply phase-voltage. The
equipment, thus, can be operated with the
power-factor of almost "1."
This makes it possible to reduce the power
transformer capacity and downsize the other devices,
compared with those required without the converter.
îš„ Upgraded braking performance
Regenerated energy occurring at highly frequent
accelerating and decelerating operation and elevating
machine operation is entirely returned to power
supply side.
Thus, energy saving during regenerative operation is
possible.
As the current waveform is sinusoidal during
regenerative operation, no troubles are caused to the
power supply system.
Rated continuous regeneration : 100%
Rated regeneration for 1 min 150% (CT use )
120% (VT use )
îš„ Enhanced maintenance/protective functions
Failure can be easily analyzed with the trace back
function (option).
(1) The past 10 alarms can be displayed with the
7-segment LEDs.
This helps you analyze the alarm causes and take
countermeasures.
(2) When momentary power failure occurs, the converter
shuts out the gate to enable continuous operation
after recovery.
(3) The converter can issue warning signals like
overload, heat sink overheating, or the end of service
life prior to converter tripping.
îš„ Enhanced network support
The converter can be connected to MICREX-SX, F series
and CC-Link master devices (using option).
The RS-485 interface is provided as standard.
When replacing an inverter from an old model
(FRENIC5000VG7S or FRENIC5000G11S) to
FRENIC-MEGA, changes to cabling may be
required. For details, refer to Appendix H.
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