2.2 Wiring
2-5
INSTALLATION AND WIRING
Chap 2
(Note 1) Install recommended circuit breakers (MCCB) or residual-current-operated protective device (RCD)/
earth leakage breakers (ELCB) (with overcurrent protective function) on the inputs of each inverter
(primary side) for wiring protection. Do not use breakers which exceed the recommended rated current.
(Note 2) Install recommended magnetic contactors (MC) as necessary on each inverter as these will be used to
disconnect the inverter from the power supply separately from the MCCB or RCD / the ELCB.
Additionally, when installing coils such as MC or solenoid close to the inverter, connect surge absorbers
in parallel.
(Note 3) When it is desired to retain the alarm signal for the activation of the protective function even inverter
main power supply is shut off, or when it is desired continuous display of the keypad, connect this
terminal to the power supply. The inverter can be operated without connecting power to this terminal
(applicable for types FRN0059E2■-4/ FRN00088E2■-2 or above)
(Note 4) The terminal does not need to be connected. Use this terminal when operating in combination with a
high power factor regenerative PWM converter (RHC series). Applicable for types FRN0203E2■-4 or
above)
(Note 5) Remove the shorting bar between the inverter main circuit terminals P1-P(+) before connecting the
direct current reactor (DCR) (option).
It must be connected in the following cases:
ND mode: Types FRN0139 E2■-4 or above, HD/ HND mode: Types FRN0168E2■-4 or above, HHD
mode: Types FRN0203E2■-4 or above.
Use the direct current reactor (option) when the power supply transformer capacity is above 500 kVA
and the transformer capacity is over 10 times the rated capacity of the inverter, or when “thyristor load
exists” in the same power system.
(Note 6) Types FRN0011E2■-7/FRN0115E2■-2/ FRN0072E2■-4 or below have built-in braking transistors,
allowing direct connection of braking resistors between P(+)-DB.
(Note 7) When connecting braking resistors to types FRN0085E2■-4 or above, always add the braking unit
(option). Connect the braking unit (option) between P(+)-N(-). Auxiliary terminals [1] and [2] have polarity.
Please connect as shown in the diagram.
(Note 8) This terminal is used for grounding the motor. Grounding the motor using this terminal is recommended
in order to suppress inverter noise.
(Note 9) Use twisted lines or shielded lines for the control signals.
Generally, the shielded line requires grounding, but when the effect of externally induced noise is large,
connecting to [CM] may suppress the effect of noise. Separate the line from the main circuit wiring and
do not enclose in the same duct. (Separation distance of over 10 cm is recommended.) When crossing
the main circuit wiring, make the intersection perpendicular.
(Note 10) The various functions listed for terminals[X1] to [X5](digital inputs), terminals [Y1] to [Y2](transistor
output), and terminal [FM] (monitor output) show the functions assigned as factory default.
(Note 11) These are connectors for switching the main circuit. For details, refer to “2.2.7 Switching connector
(types FRN0203E2■-4 or above)”.
(Note 12) The slide switches on the control printed circuit board define the settings for the inverter operation. For
details, refer to “2.2.8 Operating slide switches”.
(Note 13) Make the circuit breakers (MCCB) or the magnetic contactors (MC) trip by the thermal relay auxiliary
contacts (manual recovery).
(Note 14) Shorting bars are connected between the safety function terminals [EN1], [EN2], and [PLC]
as factory
defau
lt. Remove the shorting bars when using this function.
(Note 15) and are separated and insulated.
(Note 16) Charge lamp does not exist in the inverters FRN0069E2■-2/FRN0044E2■-4/FRN0011E2■-7 or
below.
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