5 Electrical Connection

Caution

Prior to commencing work, ensure that the connection cables are de-energised and that it is not possible to activate the power supply.

In order to avoid deformation of the supporting rail i and to protect the base of the connection terminal against torsional forces, it is advisable to hold the

cable in position when tightening the clamping screw.

The protective measure of earth connection serves to prevent excessive touch voltage on freely accessible metal parts. The

PROTECT 1. is earthed by the provided earthing bolts ( / PE). Prior to start-up, it must be ensured that the PROTECT 1. is earthed in accordance with valid regulations, e.g. VDE 0100.

Before the connection work is carried out, check that:

♦The values of the nominal voltage (input voltage) and frequency match those on the nameplate of the UPS.

♦The earth connection matches the prescribed IEC standards or the local regulations,

♦The UPS is connected to the electrical mains via a separate supply line equipped with fuses on the supply- side MI distribution.

♦The power fuse in the MI distribution has the same or higher value as the one indicated on the nameplate of the UPS system.

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