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Chapter 3 Installation
Handling methods of interference from peripheral electromagnetic equipment
on AC drive.Electromagnetic effects on inverter generally result from the inst-
allation of many relays, contactors or electromagnetic contactors near AC
drive. When AC drive has false operation from the interference, please try to
solve it with following methods:
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Install surge suppressor on the devices that make interference
Install filter at signal input terminal of AC drive;
The leading wire of AC drive’s control signal line and detection circuit sh-
all be shield cable, and reliable ground connection also is necessary for
shielding layer.
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The handling methods
of interference on peripheral equipments from the noi
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ses of AC drive:
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Instrument, receiver, sensor and other equipment for measurement,gen
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erally have a weaker signal. If they are placed near AC drive or in a same
control cabinet, they will suffer interference and operate falsely. So we
advise to take following methods: Keep away from interference source;
Signal line shall not be placed with power line in parallel, especially shall
not be tied up together in parallel, and please adopt shield cable signal
line and power line;Install linear filter or radio noise filter at the input and
output sides of AC drive.
When interrupted equipments and AC drive share a same power supply, if
above methods still cannot help to eliminate interference, you shall install
linear filter or radio noise filter between AC drive and power supply.
This part of noise can be divided into two categories: One is the radiation of
AC drive itself, and the other one is the radiation of the leading wire from inv-
erterto motor.
These two kinds of radiations make the leading wires surface of peripheral
electrical equipments suffer electromagnetic and electrostatic induction,
which will lead to false operations of equipments. About these several differ-
ent disturbed conditions, please refer to following methods to resolve them:
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