18
Electrical Connection
Electrical Connection
The electrical connection may only be carried out by specialists with the necessary know-
ledge of relevant accident prevention regulations and other standard regulations relevant
to health and safety in the workplace, based on their training and experience.
Take protective measures!
During installation and connection of the unit, additional protective measures must be
taken into account when setting up low voltage equipment in accordance with the EC
directive and the regulations of the local utility provider. Ensure earthing/grounding and
potential equalisation is provided for the unit and all connected components and indivi-
dual units.
It must be ensured in a demonstrable way that all individual units are connected in a elect-
roconductive manner. (Usually potential equalisation is provided using connection screws
and bolts). The entire unit or system must be connected to the same potential.
Passive switch contacts in explosion protected units may only be used in intrinsically safe
electric circuits.
ELECTRICAL HAZARD!
All power supply connections must be switched off and be voltage-free and secured
against unintentional switching on. Earth and short-circuit them and cover over any neigh-
bouring electrically conducting components or block them off. Failure to do so may lead
to serious injury or death.
NOTE
The cable installation must be carried out in accordance with the enclosed wiring diagram
of the unit and nationally applicable standards and guidelines. Only one separate mains
power cable should be used. Never connect other units to this mains power cable.
Prerequisites
• Carry out a full visual inspection of the entire unit and installed components.
• Before you start with the electrical connection, check the following:
– The characteristics of the mains power supply must satisfy EN 60204-1 regula-
tions and the power requirements of the unit.
– The size of the backup fuse must be determined by the specialist electricalte-
chnician responsible based on the unit’s power rating.
– The motors must be able to operate at their nominal capacity where the input
voltage with nominal frequency is between 95 % and 105 % of the nominal
voltage.
Cable routing and grommets by others
• The installation of cable grommets and the routing of cables near doors, panels with
sash fasteners, panel connections and cover strips must be avoided.
• Screw connections and grommets must not cause any leaks.
• The connecting cables within the fan components must be long enough to allow the
motor to be moved without difficulty (in order to re-tension the V-belt, for example).
Connecting the unit
Each subassembly with an electrical connection must be earthed separately.
Visual inspection of the
mechanics
