Chapter 10 Options
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10-4.Noise filter
This filter is used to inhibit the conduction of electromagnetic interference noise
generated from the inverter, and also inhibit the interference of external radio and
instantaneous surge to this unit.
Before using, firstly confirm that the power supply is three-phase three-wire or
three-phase four-wire; if it's a single-phase, the grounding wire should be chunky, the
filter should be close to the inverter as much as possible.
The filter shall be used in the following occasions of residential area, commercial
area, scientific & research units, and the occasion that requires higher protection to
radio interference, or the conditions that meets CE, PL, CSA standards and is inadequate
on the peripheral anti-interference equipments.
To purchase it, please contact this company.
10-5.Contactor
It's used to cut off power supply to prevent the failure to be expanded when the
protection function of the system is activated. The contactor can not be used to control
the stop/start of the motor.
10-6.Braking unit and braking resistor
Frequency inverter PI9000 series: 220V 7.5kW and below models & 380V 15kW
and below models, there is built-in braking unit, the maximum braking torque is 50%.
Refer the table below to match the braking resistors. 220V 11kW and above models &
380V 18.5kW and above models need external braking unit if braking function required.
Please select POWTRAN braking unit and resistor models according to the specific site
conditions.
Resistance of
braking resistor(Ω)
Power of braking
resistor(W)
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