5 Basic Settings
5 - 12
High-function General-purpose Inverter 3G3RX-V1 User’s Manual (I578-E1)
The 3G3RX-V1 Series Inverter supports dual load ratings (heavy load mode and light load mode).
This enables the efficient utilization of the inverter according to your application.
• According to your application, select one of the two modes: heavy load mode and light load mode.
• The heavy load mode provides the same load rating as the conventional 3G3RX Series Inverter. This
means that the overload capacity is 150% of the rated current of the inverter for 1 minute.
• For loads (such as fan and pumps) that do not require frequent use of the inverter above the rated
torque, you can select the light load mode.
Setting the light load mode causes the rated current of the inverter to increase, which enables the
inverter to drive a motor, one size larger in capacity. However, the overload capacity is 120% of the
rated current of the inverter for 1 minute.
• Use the Heavy Load/Light Load Selection (b049) to switch between the heavy load mode and the
light load mode.
It is not necessary to cycle the power supply after changing this setting.
The characteristics in the heavy load mode and the light load mode are as shown below.
Changing the Heavy Load/Light Load Selection (b049) setting switches the setting ranges and default
datas of some parameters.
Doing so also causes some parameter settings to be initialized at the same time.
For these parameters, you must set data again after changing the b049 setting even if you configured
them beforehand.
• Changing from heavy load mode to light load mode:
Basically causes the parameter settings to be initialized. For details, refer to the Initialization at mode
switching column in the following table.
• Changing from light load mode to heavy load mode:
Basically does NOT cause the parameter settings to be initialized. For details, refer to the
Initialization at mode switching column in the following table.
5-2-2 Heavy Load/Light Load Selection
Parameter No. Function name Data Default data Unit
b049
Heavy Load/Light Load
Selection
00: Heavy load mode (CT)
01: Light load mode (VT)
00 –
Item Heavy load (CT) Light load (VT)
Feature
Loads that require a high torque during
acceleration/deceleration etc.
Loads that do not require frequent use of the
inverter above rated torque
Application Elevator, crane, conveyor, etc. Fan, pump, air conditioner, etc.
Rated current
(Example)
3.0 A (3-phase 200-V, 0.4-kW inverter) 3.7 A (3-phase 200-V, 0.4-kW inverter)
Overload current
rating
150%, 60 s 120%, 60 s
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