Communications Diagnostics Technical data
28
Commander S100 User Guide
4.7 Electromagnetic compatibility (EMC)
Due to the switching devices used within the drive, the drive may emit radio-frequency noise causing disturbance to electrical devices in close
proximity. Emissions are higher with long motor cables and high switching frequencies. Shorter motor cables and low switching frequencies reduce
emissions. To ensure reliable operation of the drive and minimise the risk of disturbing nearby equipment, follow the guidance below that is suitable
for drive installations that should comply with IEC 61800-3.
The installer of the drive is responsible for ensuring compliance with the EMC regulations that apply in the country in which the drive is to be used.
Operation in the first environment
Observe the guidelines given in section 4.7.1
.. Single phase 230 V drives with an internal C1 filter for operation in the first
environment are available. For the other drives in the series, an external EMC filter will always be required to achieve C1.
Operation in the second environment
In all cases a shielded motor cable must be used. The correct external filter must be fitted at the input to the drive to achieve equipment category C2
compliance for radiated emissions.
For EMC Performance Ratings and optional external EMC filters, refer to section 10.4
4.7.1 EMC compliant installation
This section describes installation steps that should be followed to minimise radio-frequency emissions from the drive to reduce disturbance to nearby
equipment. As an overview this entails:
•
Ensuring good EMC grounding
•
Using shielded motor cables
•
Providing suitable cable clearances
•
Providing surge suppression to analog and digital inputs
•
Managing motor cable interruptions
•
Following enclosure layout considerations
Ensuring good EMC grounding
Ensure good electrical contact between the drive EMC backplate screw, marked
❶
in Figure 4-6 below, and the enclosure backplate. This may
require removing paint on the back panel of the enclosure before installing the drive. The same should be done for the mounting points on an external
EMC filter if one is being used.
Where the drive is mounted on DIN rail, a good electrical connection to the backplate is not guaranteed without fitting the additional EMC backplate
screw (bottom-centre). If it is not possible to use this screw, then the motor cable screen should be bonded to the cable management bracket
accessory, or if necessary connected using a short pig-tail to the drive ground connections.
Figure 4-6 EMC backplate screw
NOTE
In a residential environment, this product may cause radio interference in which case supplementary mitigation measures may be required.
CAUTION
The second environment typically includes an industrial low-voltage power supply network which does not supply buildings used for
residential purposes. Operating the drive in this environment without an external EMC filter may cause interference to nearby electronic
equipment whose sensitivity has not been appreciated. The user must take remedial measures if this situation arises. If the consequences
of unexpected disturbances are severe, it is recommended that the guidelines in section 4.7.1
. be adhered to.
CAUTION
Summary of Contents for COMMANDER S100
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