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Description of terminal functions (main circuit terminal)
Classification
Terminal
symbol
Terminal name
Specification
M
ai
n c
ir
c
ui
t
L1/R, L2/S,
L3/T
Main power
input
Terminals to connect three-phase power source.
L1/L, L2/N
Main power
input
Terminals to connect single-phase power source.
U, V, W
Inverter output
Terminals to connect three-phase motors.
P (+), P1
For direct
current reactor
connection
Terminals to connect DC reactor (DCR) for power factor enhancement.
It must be connected in the following cases:
ND mode: Types FRN0139E2■-4G or above.
HD/HND
mode: Types FRN0168E2■-4G or above.
HHD mode: Types FRN0203E2■-4G or above.
It is not required to connect a DC reactor when supplying the inverter only from PV
panel.
P (+), N (-)
For direct
current bus
connection
Terminals to connect to DC supply voltage from PV panel.
P (+), DB
For braking
resistor
connection
Terminals to connect a braking resistor (optional). Wiring length: Below 5 meters.
(Types FRN0220
E2■-2G/FRN0072E2■-4G or below)
G
For inverter
chassis (case)
grounding
Grounding terminal for inverter chassis (case).
R0, T0
Auxiliary power
input for control
circuit
When it is desired to retain the alarm signal for the activation of the protective
function at even inverter main power supply shut off or when continuous display of
the keypad is desired, connect this terminal to the power supply.
(Types FRN0185E2
■-2G/FRN0059E2■-4G or above)
R1, T1
Auxiliary power
input for fan
Ordinarily, these terminals do not need to be connected. Connect these terminals
to AC power supply when operating with direct current power input (such as in
combination with PWM converters).
(Types FRN0203
E2■-4G or above)
Follow the sequence below when wiring.
(1) Inverter ground terminal (
z
G)
(2) Inverter output terminals (U, V, W), motor ground terminal (
z
G)
(3) Direct current reactor connection terminals (P1, P(+))*
(4) Braking resistor connection terminals (P(+), DB)*
(5) Direct current bus connection terminals (P(+), N(-))*
(6) Main power supply input terminals (L1/R, L2/S, L3/T) or (L1/L, L2/N)
* Connect if necessary
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Summary of Contents for Frenic-Sce
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