GE FVR-C9S-7UX instruction manual Electromagnetic Compatibility EMC, General, RFI Filters

FVR-C9S-7UX

16. Electromagnetic Compatibility (EMC)

1. General

In accordance with the provisions described in the European Commission Guidelines Document on Council Directive 89/336/EEC, Fuji Electric Co., Ltd. has chosen to classify the FVR-C9S-7UX range of drives as “Com- plex Components”. Classification as “Com- plex Components” allows a product to be treated as “apparatus”, and thus permits compliance with the essential requirements of the EMC Directive to be demonstrated to both an integrator of FVR drives and to his customer or the installer user. FVR drives up to 2 Hp are supplied “CE-marked”, signifying compliance with EC Directive 89/336/EEC when fitted with specified filter units installed and earthed in accordance with this sheet. This specification requires the following performance criteria to be met.

Immunity : EN50082-2

Emissions : EN50081-1

2. RFI Filters

It is strongly recommended that the appro- priate FVR input filter is used, as shown in the followings, to limit RF current flowing into the main supply circuit. Without an input filter a FVR installation may not meet statu- tory requirement. FVR drives contain high power semi-conductor devices which are switched at high speeds to synthesis a near- sinusoidal current waveform across the frequency range of the output. Rapidly- changing voltages and currents will generate some degree of electromagnetic emission. Emissions will be predominantly conducted through the motor and the mains supply cables, although some radiated emissions will be detected in close proximity to the drive system. It is essential that precautions are taken both at the design stage and at the time of installation to prevent radio fre- quency interference (RFI) from the drive system affecting sensitive equipment in close proximity.

3. Recommended Installation Instructions

It is necessary that to conform to the EMC Directive, these instructions must be fol- lowed. Follow the usual safety procedures when working with electrical equipment. All electrical connections to the filter, drive and motor must be made by a qualified electrical technician.

1)Check the filter rating label to ensure that the current, voltage rating and part number are correct.

2)The back panel of the wiring cabinet of board should be prepared for the mounting dimensions of the filter. Care should be taken to remove any paint etc. from the mounting holes and face area around the hole of the panel. This will ensure the best possible earthing of the filter.

3)The filter should then be securely mounted in position, and the drive mounted to the front of the filter with the screws provided.

4)Connect the incoming mains supply to the filter terminals marked “LINE” and earth any cables to the earth stud provided. And fit the Input Ferrite Ring (if required two ferrite rings, refer to table 1), then connect the filter terminals marked “LOAD” to the mains input of the drive using short length of appropriate gauge wire.

5)Fit the Output Ferrite Ring as close to the drive as possible and connect the motor. Armored or screened cable should be used with the 3 phase conductors only passing twice through the center of the Output Fer- rite Ring. The earth conductor should be securely earthed at both drive and motor ends. The screen should be connected to enclosure.

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