Inovance MD880-01S-0751-4 - EMC-Compliant Cable Routing

3 Electrical Installation
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3.3 System Structure
Table 3-1 Descriptions of system peripherals
Peripheral Name Mounting Location Function
Circuit breaker
Between power supply
and AC drive input side
MCCB: Cuts o󶍽 power supply when overcurrent
occurs on downstream devices.
Earth leakage circuit breaker (ELCB): Protects against
potential leakage current during AC drive running to
prevent electric shock which may cause a 󶍾re. Select
a proper ELCB based on actual applications.
Fuse
Between power supply
and AC drive input side
Provides protection in case of short circuit and
protect downstream semiconductors.
(Electromagnetic)
Contactor
Between the circuit
breaker and the AC
drive input side
Do not start/stop the AC drive frequently by switching
on/o󶍽 the contactor (at an interval less than 1 h) or
start the AC drive directly through the contactor.
Input reactor AC drive input side
Improves the power factor of power input side.
Eliminates higher harmonics of the input side
e󶍽ectively and prevents other devices from being
damaged due to distortion of voltage waveform.
Eliminates input current unbalance caused by inter-
phase unbalance.
EMC 󶍾lter AC drive input side
Reduces external conduction and radiation
interference of the AC drive.
Reduces conduction interference 󶍿owing from
power supply to the AC drive and improves the anti-
interference capacity of the AC drive.
DC reactor
Between the EMC 󶍾lter
and the braking resistor
The DC reactor is
standard in models
above 22 kW only.
Improves the power factor of power input side.
Improves the overall e󶎀ciency and thermal stability
of the AC drive.
Eliminates harmonics on the input side and reduces
conducted and radiated interferences generated from
the AC drive to the outside.
Braking resistor
Models of 90 kW and
below: terminals (+) and
BR
Use a braking resistor for models of 90 kW and below
as needed.
Dissipates regenerative energy during motor
deceleration.
Braking unit
Models of 110 kW and
above: terminals (+) and
(-)
Use an MDBUN braking unit of Inovance and a
recommended braking resistor for models of 110 kW
and above as needed.
Dissipates regenerative energy during motor
deceleration.