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High-function General-purpose Inverter RX2 Series User’s Manual
External Resistor Type (Model: 3G3AX-RBU23/RBU24/RBU42/RBU43)
Applicable voltage class 3-phase 200-V class 3-phase 400-V class
Model 3G3AX-RBU23 3G3AX-RBU24
3G3AX-RBU42
*1
*1. To use the braking resistor (3G3AX-RAB/RBB/RBC) for the 400-V class regenerative braking unit, be sure to remove the
built-in resistor and connect two resistors of the same model in series. Using a 400-V class regenerative braking unit with
only a single braking resistor connected may cause damage to the braking resistor.
3G3AX-RBU43
*1
Connection
resistance
Continuous operation 6 min. 4 min. 24 min. 12 min.
Short-time operation/
Allowable operation
cycle/
Allowable continuous
ON time
4 min.
Cycle 1/5
(ON for 2 min/
OFF for 8 min)
2 min
2 min.
Cycle 1/5
(ON for 2 min/
OFF for 8 min)
2 min
10 min.
Cycle 1/10
(ON for 10 s/
OFF for 90 s)
10 s
6 min.
Cycle 1/5
(ON for 2 min/
OFF for 8 min)
2 min
Operating voltage (ON/OFF)
ON: 362.5 ± 5 V, OFF: 355 ± 5 V
(–5% or –10% setting available)
ON: 725 ± 5 V, OFF: 710 ± 5 V
(–5% or –10% setting available)
Operation indication LED ON (Lit)
Maximum number of units for paral-
lel interlocking operation
*2
*2. Use DIP switches to set the number of connected units.
2 units
Protective
function
Internal power mod-
ule overheat protec-
tion
Built-in relay specifications
· Cooling fin temperature: Relay operates at approximately 100°C or higher.
· Contact rating: 240 VAC 3A (R load)
36 VDC 2A (R load)
· Minimum load: 5 VDC 50 mA (R load)
Operating
environment
Operating ambient
temperature
–10 to 50°C
Storage ambient tem-
perature
–20 to 65°C
Operating ambient
humidity
20% to 90% (with no condensation)
Vibration resistance
4.9 m/s
2
(0.5 G), 10 to 55 Hz
Location At a maximum altitude of 1,000 m (without corrosive gases or dust)
Paint color Munselle 5Y7/1 (except for cooling fan with aluminum base color)
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