3.3.2 Terminal functions
Table 3.3-1 Main Circuit Terminals
Converter stack
Terminal symbol
Name
Specification
M
ai
n
ci
rcu
it
L1/R, L2/S, L3/T
Main power input
Connect to 3-phase power supply via an exclusive reactor or
the like.
P(+), N(-)
Converter output
Connect to the power input terminals P (+) and N (-) of the
inverter.
G
Grounding terminal
Grounding terminal of the chassis (case) of the converter.
R0, T0
Auxiliary control power
input
Connect to the same power system as the main circuit power
supply and backup terminal of the control power supply.
R1, S1, T1
Synchronous power
supply input for voltage
detection / Fan power
input
Synchronous power supply input for voltage detection and
Fan power input are sharing by factory default.
R1, S1, T1 : Voltage detection terminal used for the control
inside converter; connect to the power supply of the special
filter.
R1, T1 : Connection terminal for AC cooling Fan power
inside converter; connect to the power supply of the special
filter.
R3, T3
Fan power input
R1, T1 are Fan power input by factory default.
To use the Fan power supply individually, tap switching is
required inside the converter.
For the details of basic connection diagram, refer to Section 3.3.4 "Basic connection
diagrams" and Section 3.3.5 "Details of connection".
N(-)
Cdc
R0
T0
PWM converter (RHC-D series)
P(+)
N(-)
U
V
W
L1/R
L2/S
L3/T
Inverter
M
3
φ
Power
supply
R1
S1
T1
AVR
ACR
PWM
Base drive
signal
Auxiliary
control
power
input
Current
detection
Voltage
detection
Edc*
fs
IR
IT
+
-
+
-
AVR: Auto voltage regulator
ACR: Auto current regulator
PWM: Pulse width modulation
fs: Carrier frequency
Lr: Boosting reactor
Fac: AC fuse
Fdc: DC fuse
Edc: DC link bus voltage
Cdc: Capacitor DC voltage
PLC: Programmable logic controller
52: Magnetic contactor (MC)
73: Magnetic contactor for charging circuit
Ro: Charging resistor
RUN
X1
RST
CM
30A
30B
30C
Y5A
Y1
Y2
Y3
Y5C
Arithmetic
control unit
Communications
option
PLC
Edc
P(+)
52
MCCB or
RCD/ELCB
PLC
73C
73A
M
G
G
CME
AO1
Fac
R3
T3
IS
FAN
U1
U2
DCF1
DCF2
DCF1
DCF2
Microswitch for DC
fuse blowout
detection
Fdc
Sequence circuit
(Refer to Section 3.3.4
“
Basic
connection diagrams.
”
)
Filter stack (RHF-D series)
U0
V0
W0
Lr
R0
Lf
73
73-2
73-1
73
L1
L2
L3
L4
L5
L6
R3
T3
ACFAN
R11
T11
T12
R12
Cf
Rf
FUS1
FUS2
U1
U2
Sequence circuit
(Refer to Section 3.3.4
“
Basic
connection diagrams.
”
)
G
Microswitch for AC
fuse blowout
detection
Fac
Fac
×
Alarm output
Relay output (Operation
preparation complete)
General-purpose
transistor output
General-purpose
analog output
Keypad
Display and
setting process
Signal output unit
Communication
processing unit
Signal input unit
RUN/STOP
General-purpose terminal
Alarm reset
Common
Fdc
2
1
73ONB
73
73ONC
73ONA
73
CM
X1(THR)
Connect to
Microswitch for
AC fuse blowout
detection
Figure 3.3-2 Basic Circuit Configuration and Terminals
3-6
