Electrical Connection - GEA Bock EX-HG88e Series Assembly Instructions Manual

5 | Electrical connection

5 Electrical connection
DANGER
ATTENTION When attaching accessories with an electrical cable, a minimum
INFO
Risk of electric shock! High voltage!
Only carry out work when the electrical system is disconnected
from the power supply!
bending radius of 3 x the cable diameter must be maintained for
laying the cable.
Connect the compressor motor accord-
ing to the circuit diagram (s. fig. 20-22
or sticker inside the terminal box). Comply with local safety reg-
ulations for electrical work, safety standards (within the EU:
EN 60204, EN 60335 among others) and regulations for setting up
electrical systems in explosion-endangered areas (within the EU: IEC/
EN 60079-14 among others).
Avoid damage to cable fittings, since otherwise operational safety
can be impaired. Lay the cable so that the fitting to the terminal box
will not loosen itself. If necessary (e.g. installation that is not twist
free), protection against loosening can be achieved through check
nuts or appropriate adhesive. Avoid abrasion points on cables.
For cable lead-through at the terminal box, use suitable Ex cable
screw connections in the correct protective version (see name plate).
Use strain relief. Avoid abrasion points on cables.
Install all switching devices outside the explosion-endangered area.
Motor contactors, feed lines and fuses are to be rated according to
the maximum operating current (see name plate). Recommendations
for contactor and motor protection selection are included in the table
at the end of the „Electrical system" chapter 5.1.
Do not separate contacts 1 + 2 of the motor thermistors under volt-
age.
Compare the details for voltage and frequency on the nameplate with
the details for the electricity mains supply. The motor may only be
connected if these details match.
Use a motor protector switch. It should be set to the rated motor cur-
rent and checked.
For the installation of phases L1, L2 and L3 to line-up terminals U1, V1
and W1, no solid wire may be used.
Only line and cable inserts approved for the corresponding device
category may be used for passage of cables into the terminal box.
Appropriately protect cable screw connections/plug screws made of
plastic if there is an increased risk of mechanical hazard.
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