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3
PRECAUTIONS FOR USE OF THE INVERTER
Installation of power factor improving reactor
3.2 Installation of power factor improving reactor
When the inverter is connected near a large-capacity power transformer (500kVA or more) or when a power capacitor is to be
switched over, an excessive peak current may flow in the power input circuit, damaging the converter circuit. To prevent this,
always install an optional reactor (FR-HAL, FR-HEL).
∗ When connecting the FR-HEL, remove the jumper across terminals P/+ and P1.
The wiring length between the FR-HEL and inverter should be 5m (16.4feet) maximum and minimized.
REMARKS
Use the same wire size as that of the power supply wire (R/L1, S/L2, T/L3). (Refer to page 17)
P/+
P/+
(m)
(32.8feet)
MCCB MC
Inverter
AC reactor
(FR-HAL)
Power supply
R
S
TZ
Y
X
U
V
W
P1
DC reactor
(FR-HEL) *
R/L1
S/L2
R/L1
S/L2
T/L3
IM
Wiring length
Power supply system capacity
(kVA)
500
0
1000
1500
10
Range requiring
installation of
the reactor
MCCB MC
Inverter
AC reactor
(FR-HAL)
Power supply
R
S
TZ
Y
X
U
V
W
P1
DC reactor
(FR-HEL) *
IM
Three-phase power input
Single-phase power input