Inovance MD500-PLUS Series - Electrical Wiring Diagram

System Structure
‑23‑
Device
Description
(Electromagnetic)
Contactor
Switches ON/OFF the AC drive. Do not start/stop the AC drive frequently by switching the
contactor ON/OFF (time interval is at least one hour) or use the contactor to directly start the
AC drive.
AC input reactor
Improves the power factor on the input side .
Eliminates high harmonics of the input side effectively and prevents other devices from being
damaged due to distortion of voltage waveform.
Eliminates input current unbalance due to unbalance between the power phases.
EMC filter
Reduces external conduction and radiation interference of the AC drive.
Decreases conduction interference 󽗊owing from the power supply to the AC drive and
improves the anti‑interference capacity of the AC drive.
Simple filter
Reduces external conduction and radiation interference of the AC drive.
Braking resistor
Use a braking resistor for models containing letter B in the designation. The braking resistor is
used to consume the regenerative energy during motor deceleration.
Braking unit
Use a braking unit (MDBUN) or recommended braking resistor of Inovance for models not
containing letter B in the designation. The braking unit is used to consume the regenerative
energy during motor deceleration.
AFE unit
An active front end (AFE) is an optional unit used to feed the energy generated by the motor
during braking back to the power grid, which removes the use of the braking unit and braking
resistor and reduces heat emission. Inovance AFE features energy efficiency, low noise, low
harmonic, and high power factor.
DC reactor
Optional for T5 models. Standard for T6 models and above.
Improves the input‑side power factor.
Improves the efficiency and thermal stability of the AC drive.
Eliminates the impact of input high harmonics on the AC drive and reduces external
conducted and radiated disturbance.
Output reactor
Standard for T10 to T12 models containing letter L in the designation and built in for T13
models.
The output side of the AC drive generally suffers from high harmonics. When a motor is far
away from the AC drive, distributed capacitance will be generated in the circuit and certain
harmonics may cause resonance in the circuit, which will:
1. Degrade motor insulation performance and damage the motor in the long term.
2. Generate large leakage current and trigger AC drive protection frequently.
Protects motor insulation and reduces the bearing current.
Magnetic ring and ferrite
clamp
A magnetic ring on the input side suppresses noise in the input power supply system of the AC
drive. A magnetic ring on the output side reduces the interference generated by the AC drive
to external devices and reduces the bearing current.
Motor
Select an applicable motor.
External operating panel External LED operating panel MD32NKE1 and LCD operating panel MDKE9.
Note: For selection of peripheral electrical devices, see Chapter "Options".
3.2 Electrical Wiring Diagram
The typical wiring diagram is shown in " Figure 3–2 " on page 24 .