4.2 European Standards
248 YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual
Enable the Internal EMC Filter
On drive models 2xxxB, 2xxxC, 4xxxB, and 4xxxC, move the screw or screws to turn ON and OFF (enable and
disable) the EMC filter.
WARNING! Electrical Shock Hazard. Make sure that the power to the drive is OFF and the CHARGE LED light is OFF before
you move the EMC filter screw or screws. Failure to obey could cause death or serious injury.
WARNING! Electrical Shock Hazard. Do not remove covers or touch circuit boards while the drive is energized. Failure to obey
can cause death or serious injury.
WARNING! Electrical Shock Hazard. Ground the neutral point on the power supply of drive models 2xxxB/C and 4xxxA/B/C to
comply with the EMC Directive before turning on the EMC filter or if there is high resistance grounding. If the EMC filter is
switched ON without the neutral point being grounded or if there is high resistance grounding, it can cause death or serious
injury.
WARNING! Electrical Shock Hazard. Connect the ground cable correctly. Failure to obey can cause death or serious injury.
NOTICE: When disabling the internal EMC filter, move the screws from ON to OFF and then tighten to the specified torque.
Completely removing the screws or tightening the screws to an incorrect torque may cause drive failure.
NOTICE: Move the EMC switch screw or screws to the OFF position for networks that are not symmetrically grounded. Failure
to obey can cause damage to the drive.
Make sure that the symmetric grounding network is applied, and install the screw or screws in the ON position to
enable the built-in EMC filter in compliance with the EMC Directive. The EMC filter switch screw or screws are
installed in the OFF position by default.
Figure 4.7 Symmetric Grounding
NOTICE: When operating the drive with a non-grounding network, high resistance grounding, asymmetric grounding network,
install the screw or screws in the OFF position to disable the built-in EMC filter. Failure to obey the instructions can damage the
drive.
Table 4.6 shows asymmetric grounding networks.
Table 4.6 Asymmetric Grounding
Type of Grounding Diagram
Grounded at the corner of the delta connection
Grounded at the middle of the side
Single-phase, grounded at the end point
Three-phase variable transformer without solidly grounded neutral
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