5 Commissioning

Attention

Before any work is started, ensure that the cables are free of tension and no power can be switched on.

To prevent a deformation of the bus-bar and to i keep the foot of the terminal free of torsion, it is recommended to hold the cable when removing

the terminal screw.

The grounding protection prevents inappropriately high contact tension with reachable metal pieces. The grounding of the PROTECT C. is realised via the grounding screw

( / PE). Before starting ensure that the PROTECT C. is grounded according the regulations, e.g. VDE 0100.

Before starting the connection tasks check that:

♦the values of the mains voltage (input voltage) and frequency complies with the values on the label on the UPS,

♦the grounding connection complies with the IEC norms or with the regional regulations,

♦the UPS is connected to the mains via a separate and fused line in a preswitched NS distribution,

♦the power fuse in the NS distribution has the same or higher value as indicated on the label on the rear of the UPS appliance.

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