Chapter 4 Electrical Installation
Shenzhen Hpmont Technology Co., Ltd.
- 32 -
HD3N Series User Manual V1.1
4.5
Meet EMC Requirement of Installation
4.5.1
Correct EMC Installation
According to national standards GB/T12668.3, the controller should meet the two requirements of
electromagnetic interference (EMI) and anti-electromagnetic interference. The international standards
IEC/61800-3 (VVVF drive system part 3: EMC specifications and test methods) are identical to the
national standards GB/T12668.3.
HD3N are designed and produced according to the requirements of IEC/61800-3. Please install the
controller as per the description below so as to achieve good electromagnetic compatibility (EMC).
•
In a drive system, the controller, control equipment and sensors are installed in the same cabinet;
the electromagnetic noise should be suppressed at the main connecting points, and the EMI filter
and AC reactor installed in cabinet to satisfy the EMC requirements.
•
The most effective but expensive measure to reduce the interference is to isolate the noise source
and the noise receiver, which should be considered in mechanical system design phase. In driving
system, the noise source can be controller, braking unit and contactor. Noise receiver can be
automation equipment, encoder and sensor etc.
The mechanical/system is divided into different EMC areas according to electrical characteristics. The
recommended installation positions are shown in Figure 4-15.
Figure 4-15 System wiring
Explanation:
•
All areas should be isolated in space to achieve electromagnetic decoupling effect.
•
The min. distance between areas should be 20cm, and use grounding bars for decoupling among
areas, the cables from different area should be placed in different tubes.
•
EMI filters should be installed at the interfaces between different areas if necessary.
•
All of the communication cables from and signal cable from panel must be shielded.
Mains power supply
Inverter
Sensor (temperature,
liquid level sensor) etc.
Control device (the
host PC, PLC etc.)
EMI filter
Mechanical system
Motor
EMI filter
AC reactor
Manufacture machines
Earth isolated board
Power supply control cabinet
Area F
Area A
Area B
Area C
Area D
Area E
Area A
: transformers of control power
supply, control devices and sensor etc.
Area B
: interfaces of signal and control
cables, correct immunity is required.
Area C
: noise sources such as AC reactor,
controller, braking unit and contactor.
Area D
: output EMI filter and its cable connection.
Area E
: power spply.
Area F
: motor and its cable.
