ABB RDNA-01 Bedienungsanleitung PDF herunterladen (Seite 279)

ACS550-01/U1 User’s Manual 279

Technical data

Ground connections

For personnel safety, proper operation and reduction of electromagnetic emission/

pick-up, the drive and the motor must be grounded at the installation site.

• Conductors must be adequately sized as required by safety regulations.

• Power cable shields must be connected to the drive PE terminal in order to meet

safety regulations.

• Power cable shields are suitable for use as equipment grounding conductors only

when the shield conductors are adequately sized as required by safety

regulations.

• In multiple drive installations, do not connect drive terminals in series.

Corner grounded TN systems

WARNING! Do not attempt to install or remove the EMC filter screws EM1, EM3, F1

or F2 while power is applied to the drive’s input terminals.

Corner grounded TN systems are defined in the following table. In such systems,

disconnect the internal ground connection through the EMC filter capacitors (do this

also if the grounding configuration of the system is unknown), see section

Disconnecting the internal EMC filter on page 23.

The EMC filter capacitors make an internal ground connection

that reduces electro-magnetic emission. Where EMC (electro-

magnetic compatibility) is a concern, and the system is

symmetrically grounded, the EMC filter may be connected.

For reference, the diagram on the right illustrates a

symmetrically grounded TN system (TN-S system).

Corner grounded TN systems – EMC filter must be disconnected

Grounded at the

corner of the

delta

Grounded at the

mid point of a

delta leg

Single phase,

grounded at an

end point

Three phase

“Variac” without

solidly grounded

neutral

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ABB RDNA-01 Bedienungsanleitung Seite 279