Inovance MD300A-S0.2BA - Chapter 3 Mechanical and Electrical Installation; Mechanical Installation; Basic Electrical Installation

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Chapter 3 Mechanical and electrical Installation
3.1 Mechanical installation
Installation environment:
1) Mount in the location where vibration is less than 0.6g.The inverter shall be far away from
impacting lathe.
2) Do not install the inverter in the place with direct sunlight, high humidity and water.
3) Mount the inverter in the location free of corrosive gas, explosive gas or combustible gas.
4) Mount the inverter in the location free of oil dirt, dust, and metal powder.
5) Install the inverter vertically so that the heat may be expelled from the top. When two inverters
are mounted up and down, an airflow diverting plate should be fixed in between, so as to avoid
the upper inverter being baked by the lower inverter. The installation bracket must be flame
retardant. If the inverter is installed in the area with metal powder, the space inside the sealing
cabinet shall be big enough.
3.2 Basic Electrical Installation
1) There are two types of main circuit terminals for the MD300A inverter based on the voltage class,
as shown in the following table:
Terminals Name Description
L1, L2
Power input terminals for
single-phase 220V inverter
To connect to the AC 220V power supply
R, S, T
Power input terminals for
three-phase 380V inverter
To connect to the AC 380V three-phase
power supply
(+), (-)
Negative and positive
terminals of DC bus
The output point of the DC voltage, which
can connect to the braking unit, or be
used for sharing DC bus
(+), PB
Connecting terminals of
braking resistor
To connect to the braking resistor
U, V, W Output terminals of inverter To connect to the motor
PE Grounding terminal
The grounding terminal of the inverter
cabinet
2) Notes on Wiring:
 Input power supply terminals L1, L2 or R, S ,T: It is unnecessary to consider the phase
sequence.
 DC bus (+) and (-) terminals: They are the output points of the inverter after rectification. There
may exist dangerous voltages on the terminals after power-down because of the power storage
of the internal capacitors. Do not operate the terminals and internal components of the inverter
unless 5 minutes has passed after power-down.
 For the sake of safety and interference immunity, the grounding terminals of the inverter must