2-13
2) Connect an optional DBR to terminals P(+) and DB.
The internal relay terminal on inverters with a capacity of 5.5 and 7.5 kW is left unused.
3) Arrange the DBR and inverter so that the wiring length comes to 5 m or less and twist the two DBR wires or route them
together in parallel.
When connecting a DC braking resistor (DBR), never connect it to terminals other than terminals P(+) and DB.
Otherwise, a fire could occur.
DC link bus terminals P(+) and N(-)
Capacity
(kW)
Braking
transistor
Built-in DC braking
resistor (DBR)
Optional devices Devices and terminals
Braking unit Inverter―Braking unit: P(+) and N(-)
30 to 630 None None
DC braking resistor (DBR) Braking unit―DBR: P(+) and DB
1) Connecting an optional braking unit or DC braking resistor (DBR)
For inverters with a capacity of 30 kW or above, both a braking unit and DBR are necessary.
Connect the terminals P(+) and N(-) of a braking unit to those on the inverter. Arrange the inverter and the braking unit
so that the wiring length comes to 5 m or less and twist the two wires or route them together in parallel.
Next, connect the terminals P(+) and DB of a DBR to those on the braking unit. Arrange the braking unit and DBR so
that the wiring length comes to 10 m or less and twist the two wires or route them together in parallel.
For details about the wiring, refer to the Braking Unit Instruction Manual.
2) Connecting other external devices
A DC link bus of other inverter(s) or a PWM converter is connectable to these terminals.
When you need to use the DC link bus terminals P(+) and N(-), consult your Fuji Electric representative.
Switching connectors
Power switching connectors (CN UX) (for 400 V class series with 75 kW or above)
The 400 V class series with 75 kW or above is equipped with a set of switching connectors (male) which should be
configured according to the power source voltage and frequency. By factory default, a jumper (female connector) is set to U1.
If the power supply to the main power inputs (L1/R, L2/S, L3/T) or the auxiliary fan power input terminals (R1, T1) matches
the conditions listed below, change the jumper to U2.
For the switching instructions, see Figures 2.6 and 2.7.
(a) FRN75G1
-4 to FRN110G1
-4
Connector configuration
Power source voltage
398 to 440 V/50 Hz, 430 to 480 V/60 Hz
(Factory default)
380 to 398 V/50 Hz
380 to 430 V/60 Hz
(b) FRN132G1
-4 to FRN630G1
-4
Connector configuration
Power source voltage
398 to 440 V/50 Hz, 430 to 480 V/60 Hz
(Factory default)
380 to 398 V/50 Hz,
380 to 430 V/60 Hz
Note: A box (
) in the above figure replaces S or E depending on the enclosure.
A box () in the above figure replaces A or E depending on the shipping destination.
The allowable power input voltage fluctuation is within -15% to +10% of the power source voltage.
CN UX (red)
CN UX (red)
CN UX (red)
CN UX (red)
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