Frenic 5000VG7S Series, Instruction Manual

Page: 26 / 97

2-8
Figure 2-3-4
(3) Auxiliary control power input terminals (R0 and T0)
If the magnetic contactor in the power supply circuit to
the inverter is turned off (open) when the protection
circuit is activated, the inverter control power supply is
shut off. As a result, alarm outputs (30A, B, and C)
are no longer retained and indications on the
KEYPAD panel go away. To prevent this, the same
AC voltage as used for the main circuit is applied to
the auxiliary control power input terminals, R0 and T0.
Although the inverter functions with no voltage
applied to these terminals, it is strongly recommended
to connect the voltage to R0 and T0 to ensure safe
operation.
1) When a radio noise filter is used, the power to be
connected to the auxiliary control power input
terminals, R0 and T0, should be taken from a point
downstream the filter.
If it is taken from a point upstream the filter, the
noise reduction effect is impaired.
(4) DC reactor connecting terminals (P1 and P(+))
1) These terminals are provided to connect the
optional input power-factor correcting DC reactor.
A jumper is connected between the terminals
before delivery from the factory.
Remove the
jumper before connecting the DC reactor.
2) Do not remove the jumper when the DC reactor is
not used.
Note:
The DC reactors are (externally) provided as
standard equipment for 75kW or higher inverters.
Always use the DC reactor for those inverters.
3) Connect a DC reactor for an inverter meeting the
following conditions and having a rated motor
output of 55 kW or less.
･
The capacity ratio between the power transformer
and the inverter follows the Figure 2-3-4.
･
You connect a thyristor load to the same power
supply, or you control to turn ON/OFF a capacitor
adjusting power factor.
･ Imbalance of 2% or more exists in power supply.
Power supply voltage imbalance rate [% ]
Maximum voltage [V] – Minimum voltage [V]
Three-phase average voltage [V]
･ Improving input power factor is intended.
Power factor will be improved up to about 0.94.
Figure 2-3-3
Figure 2-3-2 Wiring of Auxiliary Control
Power Input Terminals
=
x 67
DC reactor required
(b)Power supply
system
Power supply
transformer
MCCB MCCB
MCCB
Inverter
Thyristor
converter
Power factor
adjusting
capacitor
(a)Capacity ratio
P
ow
er su
ppl
y
tr
an
sfo
rm
e
r ca
pa
ci
ty
Inverter capacity [kVA]/unit
0 100
500
1000
50
DC reactor not required
[kVA]
MC